diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index e0d59df..560f396 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -21,6 +21,7 @@ import ClubsPage from './pages/ClubsPage'
 import SkillsPage from './pages/SkillsPage'
 import TrainingPlanningPage from './pages/TrainingPlanningPage'
 import TrainingUnitRunPage from './pages/TrainingUnitRunPage'
+import TrainingCoachPage from './pages/TrainingCoachPage'
 import AdminCatalogsPage from './pages/AdminCatalogsPage'
 import AdminHierarchyPage from './pages/AdminHierarchyPage'
 import AdminMaturityModelsPage from './pages/AdminMaturityModelsPage'
@@ -153,6 +154,7 @@ function AppRoutes() {
         <Route path="clubs" element={<ClubsPage />} />
         <Route path="skills" element={<SkillsPage />} />
         <Route path="planning" element={<TrainingPlanningPage />} />
+        <Route path="planning/run/:unitId/coach" element={<TrainingCoachPage />} />
         <Route path="planning/run/:unitId" element={<TrainingUnitRunPage />} />
         <Route path="admin" element={<Navigate to="/admin/hierarchy" replace />} />
         <Route path="admin/hierarchy" element={<AdminHierarchyPage />} />
diff --git a/frontend/src/components/ExercisePeekModal.jsx b/frontend/src/components/ExercisePeekModal.jsx
new file mode 100644
index 0000000..1063e7d
--- /dev/null
+++ b/frontend/src/components/ExercisePeekModal.jsx
@@ -0,0 +1,149 @@
+/**
+ * Schnellansicht einer Übung aus dem Katalog (ohne die Planungsseite zu verlassen).
+ */
+import React, { useEffect, useState } from 'react'
+import { Link } from 'react-router-dom'
+import api from '../utils/api'
+import { sanitizeTrainerHtml } from '../utils/htmlUtils'
+
+function HtmlBlock({ html, className = '' }) {
+  if (!html || !String(html).trim()) return null
+  const safe = sanitizeTrainerHtml(html)
+  return (
+    <div className={`rich-text-content ${className}`} dangerouslySetInnerHTML={{ __html: safe }} />
+  )
+}
+
+function TagMini({ exercise }) {
+  const parts = []
+  ;(exercise.focus_areas || []).slice(0, 5).forEach((f) => {
+    parts.push(f.name)
+  })
+  if (parts.length === 0) return null
+  return (
+    <div className="exercise-tag-row" style={{ marginTop: '10px' }}>
+      {parts.map((p, i) => (
+        <span key={i} className="exercise-tag exercise-tag--accent">
+          {p}
+        </span>
+      ))}
+    </div>
+  )
+}
+
+export default function ExercisePeekModal({ open, exerciseId, onClose, titleFallback }) {
+  const [loading, setLoading] = useState(false)
+  const [err, setErr] = useState(null)
+  const [exercise, setExercise] = useState(null)
+
+  useEffect(() => {
+    if (!open) {
+      setExercise(null)
+      setErr(null)
+      return
+    }
+    if (!exerciseId) {
+      setErr('Keine Übung gewählt')
+      return
+    }
+    let cancelled = false
+    ;(async () => {
+      setLoading(true)
+      setErr(null)
+      try {
+        const data = await api.getExercise(exerciseId)
+        if (!cancelled) setExercise(data)
+      } catch (e) {
+        if (!cancelled) setErr(e.message || 'Laden fehlgeschlagen')
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    })()
+    return () => {
+      cancelled = true
+    }
+  }, [open, exerciseId])
+
+  if (!open) return null
+
+  return (
+    <div className="admin-modal-backdrop" role="presentation" onClick={(e) => e.target === e.currentTarget && onClose()}>
+      <div
+        className="admin-modal-sheet"
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="exercise-peek-title"
+        style={{
+          maxWidth: '620px',
+          width: '100%',
+          maxHeight: '88vh',
+          display: 'flex',
+          flexDirection: 'column',
+        }}
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="admin-modal-sheet__header">
+          <h3 id="exercise-peek-title" className="admin-modal-sheet__title">
+            {loading ? '…' : exercise?.title || titleFallback || `Übung #${exerciseId}`}
+          </h3>
+          <button type="button" className="btn btn-secondary admin-modal-sheet__close" onClick={onClose}>
+            Schließen
+          </button>
+        </div>
+        <div style={{ overflowY: 'auto', padding: '1rem', flex: 1 }}>
+          {loading && (
+            <div style={{ textAlign: 'center', color: 'var(--text2)' }}>
+              <div className="spinner" />
+              <p style={{ marginTop: '0.65rem' }}>Laden…</p>
+            </div>
+          )}
+          {!loading && err && <p style={{ color: 'var(--danger)' }}>{err}</p>}
+          {!loading && exercise && (
+            <>
+              {exercise.summary && (
+                <div style={{ fontSize: '0.95rem', color: 'var(--text2)' }}>
+                  <HtmlBlock html={exercise.summary} />
+                </div>
+              )}
+              <TagMini exercise={exercise} />
+              {(exercise.goal || exercise.preparation || exercise.execution || exercise.trainer_notes) && (
+                <hr style={{ border: 'none', borderTop: '1px solid var(--border)', margin: '1rem 0' }} />
+              )}
+              {exercise.goal && (
+                <>
+                  <h4 style={{ fontSize: '0.85rem', color: 'var(--text3)', marginBottom: 6 }}>Ziel</h4>
+                  <HtmlBlock html={exercise.goal} />
+                </>
+              )}
+              {exercise.preparation && (
+                <>
+                  <h4 style={{ fontSize: '0.85rem', color: 'var(--text3)', margin: '14px 0 6px' }}>Vorbereitung</h4>
+                  <HtmlBlock html={exercise.preparation} />
+                </>
+              )}
+              {exercise.execution && (
+                <>
+                  <h4 style={{ fontSize: '0.85rem', color: 'var(--text3)', margin: '14px 0 6px' }}>Ablauf</h4>
+                  <HtmlBlock html={exercise.execution} />
+                </>
+              )}
+              {exercise.trainer_notes && (
+                <>
+                  <h4 style={{ fontSize: '0.85rem', color: 'var(--text3)', margin: '14px 0 6px' }}>Trainer-Hinweise</h4>
+                  <HtmlBlock html={exercise.trainer_notes} />
+                </>
+              )}
+            </>
+          )}
+        </div>
+        {exerciseId && (
+          <div style={{ padding: '0 1rem 1rem', flexShrink: 0 }}>
+            <Link to={`/exercises/${exerciseId}`} className="btn btn-secondary" style={{ width: '100%', textDecoration: 'none', textAlign: 'center', display: 'block' }}>
+              Vollständige Übungsseite öffnen
+            </Link>
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/frontend/src/pages/TrainingCoachPage.jsx b/frontend/src/pages/TrainingCoachPage.jsx
new file mode 100644
index 0000000..b84c3ba
--- /dev/null
+++ b/frontend/src/pages/TrainingCoachPage.jsx
@@ -0,0 +1,521 @@
+/**
+ * Coach-Modus: eine Position nach der anderen mit Assistentenhinweisen, Zeitnahme und optionaler Nachbereitung.
+ */
+import React, { useCallback, useEffect, useMemo, useState } from 'react'
+import { Link, useNavigate, useParams } from 'react-router-dom'
+import api from '../utils/api'
+import ExercisePeekModal from '../components/ExercisePeekModal'
+import {
+  flattenPlanTimeline,
+  itemStableKey,
+  sectionsToPutPayload,
+  summarizeTimelineEntry,
+} from '../utils/trainingPlanUtils'
+
+function storageStepKey(unitId) {
+  return `sj_coach_step_${unitId}`
+}
+
+function storageDeltasKey(unitId) {
+  return `sj_coach_deltas_${unitId}`
+}
+
+function formatClock(totalSec) {
+  const m = Math.floor(totalSec / 60)
+  const s = totalSec % 60
+  return `${String(m).padStart(2, '0')}:${String(s).padStart(2, '0')}`
+}
+
+function statusLabel(s) {
+  if (s === 'completed') return 'Durchgeführt'
+  if (s === 'cancelled') return 'Abgesagt'
+  return 'Geplant'
+}
+
+function mergeDelta(setDeltas, itemKey, patch) {
+  setDeltas((prev) => ({ ...prev, [itemKey]: { ...prev[itemKey], ...patch } }))
+}
+
+export default function TrainingCoachPage() {
+  const { unitId } = useParams()
+  const navigate = useNavigate()
+  const idNum = unitId ? parseInt(unitId, 10) : NaN
+
+  const [unit, setUnit] = useState(null)
+  const [loadError, setLoadError] = useState(null)
+  const [loading, setLoading] = useState(true)
+
+  const [peekId, setPeekId] = useState(null)
+  const [outlineOpen, setOutlineOpen] = useState(false)
+  const [debriefOpen, setDebriefOpen] = useState(false)
+
+  const [step, setStep] = useState(0)
+  const [deltas, setDeltas] = useState({})
+
+  const [runStartAt, setRunStartAt] = useState(null)
+  const [pausedAccumMs, setPausedAccumMs] = useState(0)
+  const [, setPulse] = useState(0)
+
+  const [trainerAppend, setTrainerAppend] = useState('')
+  const [saveMarkDone, setSaveMarkDone] = useState(true)
+  const [saving, setSaving] = useState(false)
+  const [saveOk, setSaveOk] = useState(null)
+
+  const reloadUnit = useCallback(async () => {
+    const u = await api.getTrainingUnit(idNum)
+    setUnit(u)
+  }, [idNum])
+
+  useEffect(() => {
+    if (!unitId || Number.isNaN(idNum)) {
+      setLoadError('Ungültige Trainingseinheit')
+      setLoading(false)
+      return
+    }
+    let cancelled = false
+    ;(async () => {
+      setLoading(true)
+      setLoadError(null)
+      try {
+        await reloadUnit()
+        if (cancelled) return
+        try {
+          const s = parseInt(sessionStorage.getItem(storageStepKey(idNum)), 10)
+          if (!Number.isNaN(s) && s >= 0) setStep(s)
+        } catch {
+          /* ignore */
+        }
+        try {
+          const raw = sessionStorage.getItem(storageDeltasKey(idNum))
+          if (raw) {
+            const o = JSON.parse(raw)
+            if (o && typeof o === 'object') setDeltas(o)
+          }
+        } catch {
+          /* ignore */
+        }
+      } catch (e) {
+        if (!cancelled) setLoadError(e.message || 'Laden fehlgeschlagen')
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    })()
+    return () => {
+      cancelled = true
+    }
+  }, [unitId, idNum, reloadUnit])
+
+  useEffect(() => {
+    sessionStorage.setItem(storageStepKey(idNum), String(step))
+  }, [idNum, step])
+
+  useEffect(() => {
+    try {
+      sessionStorage.setItem(storageDeltasKey(idNum), JSON.stringify(deltas))
+    } catch {
+      /* quota */
+    }
+  }, [idNum, deltas])
+
+  useEffect(() => {
+    if (runStartAt == null) return undefined
+    const iv = setInterval(() => setPulse((p) => p + 1), 380)
+    return () => clearInterval(iv)
+  }, [runStartAt])
+
+  const timeline = useMemo(() => flattenPlanTimeline(unit), [unit])
+
+    pausedAccumMs + (runStartAt != null ? Date.now() - runStartAt : 0)
+
+  const tickDisplaySec = Math.max(0, Math.floor(elapsedMs / 1000))
+
+  const clampStep = (s) =>
+    Math.max(0, Math.min(s, Math.max(timeline.length - 1, 0)))
+
+  const currentEntry = timeline[step]
+  const nextEntry = timeline[step + 1] || null
+  const next2Entry = timeline[step + 2] || null
+
+  const timerStart = () => {
+    setRunStartAt(Date.now())
+  }
+
+  const timerPause = () => {
+    if (runStartAt != null) {
+      setPausedAccumMs((a) => a + (Date.now() - runStartAt))
+      setRunStartAt(null)
+    }
+  }
+
+  const timerReset = () => {
+    setRunStartAt(null)
+    setPausedAccumMs(0)
+  }
+
+  const applySuggestedDuration = () => {
+    if (!currentEntry?.item || currentEntry.item.item_type !== 'exercise') return
+    const key = itemStableKey(currentEntry.item, currentEntry.secOrder, currentEntry.ii)
+    const min = Math.max(1, Math.round(elapsedMs / 60000)) || null
+    if (min != null) mergeDelta(setDeltas, key, { actual_duration_min: min })
+    timerPause()
+  }
+
+  const goPrev = () => setStep((s) => clampStep(s - 1))
+  const goNext = () => setStep((s) => clampStep(s + 1))
+
+  const markCurrentDoneAdvance = () => {
+    timerPause()
+    if (step < timeline.length - 1) setStep((s) => s + 1)
+  }
+
+  const durationOverridesForApi = useMemo(() => {
+    const out = {}
+    for (let i = 0; i < timeline.length; i++) {
+      const ent = timeline[i]
+      const { item } = ent
+      if (item.item_type !== 'exercise' || item.id == null) continue
+      const k = itemStableKey(item, ent.secOrder, ent.ii)
+      const dv = deltas[k]?.actual_duration_min
+      if (dv !== undefined && dv !== '' && dv !== null && !Number.isNaN(Number(dv))) {
+        out[String(item.id)] = { actual_duration_min: Number(dv) }
+      }
+    }
+    return out
+  }, [timeline, deltas])
+
+  const handleSaveDebrief = async () => {
+    setSaveOk(null)
+    setSaving(true)
+    try {
+      const sectionsPayload = sectionsToPutPayload(unit, durationOverridesForApi)
+      const tn = trainerAppend.trim()
+      const mergedTrainer = tn
+        ? [unit.trainer_notes || '', `--- (${new Date().toLocaleString('de-DE')}) ---`, tn].filter(Boolean).join('\n')
+        : unit.trainer_notes
+
+      await api.updateTrainingUnit(idNum, {
+        trainer_notes: mergedTrainer.trim() ? mergedTrainer.trim() : unit.trainer_notes,
+        ...(saveMarkDone ? { status: 'completed' } : {}),
+        sections: sectionsPayload,
+      })
+      await reloadUnit()
+      setTrainerAppend('')
+      try {
+        sessionStorage.removeItem(storageDeltasKey(idNum))
+      } catch {
+        /* ignore */
+      }
+      setDeltas({})
+      setSaveOk('Gespeichert.')
+      setDebriefOpen(false)
+    } catch (e) {
+      setSaveOk(`Fehler: ${e.message || e}`)
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  if (loading) {
+    return (
+      <div style={{ padding: '2rem', textAlign: 'center' }}>
+        <div className="spinner" />
+        <p>Coach laden…</p>
+      </div>
+    )
+  }
+
+  if (loadError || !unit) {
+    return (
+      <div className="card" style={{ margin: '1rem', padding: '1.5rem' }}>
+        <p style={{ marginBottom: '1rem' }}>{loadError || 'Nicht gefunden.'}</p>
+        <button type="button" className="btn btn-secondary" onClick={() => navigate('/planning')}>
+          Zur Planung
+        </button>
+      </div>
+    )
+  }
+
+  return (
+    <div className="training-coach-page" style={{ maxWidth: '720px', margin: '0 auto', paddingBottom: 'calc(env(safe-area-inset-bottom) + 2rem)' }}>
+      <ExercisePeekModal open={peekId != null} exerciseId={peekId || null} onClose={() => setPeekId(null)} titleFallback={null} />
+
+      <nav
+        className="no-print training-coach-top"
+        style={{ display: 'flex', flexWrap: 'wrap', gap: '8px', alignItems: 'center', marginBottom: '12px' }}
+      >
+        <button type="button" className="btn btn-secondary" onClick={() => navigate(`/planning/run/${unitId}`)}>
+          Zur Planansicht
+        </button>
+        <button type="button" className="btn btn-secondary" onClick={() => navigate('/planning')}>
+          Planung
+        </button>
+        <button
+          type="button"
+          className="btn btn-primary"
+          onClick={() => setOutlineOpen((o) => !o)}
+          style={{ marginLeft: 'auto' }}
+        >
+          {outlineOpen ? 'Rahmen schließen' : 'Trainingsrahmen'}
+        </button>
+      </nav>
+
+      <header className="card training-coach-hero" style={{ padding: '14px 16px', marginBottom: '12px', background: 'var(--surface)', borderRadius: '12px', borderLeft: `4px solid var(--accent)` }}>
+        <div style={{ fontSize: '0.75rem', color: 'var(--text3)', textTransform: 'uppercase', letterSpacing: '0.06em' }}>Im Training · Coach</div>
+        <h1 style={{ fontSize: '1.28rem', margin: '8px 0 6px', lineHeight: 1.28 }}>
+          {unit.planned_date}
+          {unit.planned_time_start && ` · ${String(unit.planned_time_start).slice(0, 5)}`}
+          {unit.planned_focus ? ` · ${unit.planned_focus}` : ''}
+        </h1>
+        <div style={{ fontSize: '0.86rem', color: 'var(--text2)', display: 'flex', gap: '10px', flexWrap: 'wrap', alignItems: 'center' }}>
+          {unit.group_name && (
+            <span>
+              <strong>Gruppe</strong>: {unit.group_name}
+            </span>
+          )}
+          <span>
+            <strong>Status:</strong> {statusLabel(unit.status)}
+          </span>
+          <span style={{ opacity: 0.85 }}>
+            Schritt {(step || 0) + 1} / {Math.max(timeline.length, 1)}
+          </span>
+        </div>
+      </header>
+
+      {outlineOpen && (
+        <div className="card training-coach-outline" style={{ marginBottom: '12px', padding: '12px 14px' }}>
+          <div style={{ fontSize: '0.78rem', color: 'var(--text3)', marginBottom: '8px' }}>Ablauf (Antippen springt zum Schritt)</div>
+          <div style={{ display: 'flex', flexDirection: 'column', gap: '6px', maxHeight: '38vh', overflowY: 'auto' }}>
+            {timeline.map((ent, ix) => {
+              const lbl = summarizeTimelineEntry(ent)
+              const secTitle = ent.sec.title || `Abschnitt ${ent.si + 1}`
+              const active = ix === step
+              return (
+                <button
+                  key={`${itemStableKey(ent.item, ent.secOrder, ent.ii)}-${ix}`}
+                  type="button"
+                  className={`btn ${active ? 'btn-primary' : 'btn-secondary'}`}
+                  style={{
+                    textAlign: 'left',
+                    justifyContent: 'flex-start',
+                    opacity: active ? 1 : 0.92,
+                    fontWeight: active ? 700 : 500,
+                  }}
+                  onClick={() => setStep(ix)}
+                >
+                  <span style={{ opacity: 0.75 }}>{secTitle.substring(0, 14)} › </span>
+                  <span>{lbl}</span>
+                </button>
+              )
+            })}
+          </div>
+        </div>
+      )}
+
+      {timeline.length === 0 ? (
+        <p className="card" style={{ padding: '1rem' }}>
+          Dieser Plan ist leer.{' '}
+          <Link to="/planning">Unter Planung ergänzen</Link>.
+        </p>
+      ) : (
+        <>
+          <div className="card training-coach-assist" style={{ marginBottom: '12px', padding: '14px 16px', background: 'var(--accent-light)' }}>
+            <div style={{ fontSize: '0.75rem', fontWeight: 700, color: 'var(--accent-dark)', marginBottom: '8px' }}>Assistenz · als Nächstes</div>
+            {nextEntry ? (
+              <>
+                <p style={{ margin: '0 0 6px', fontSize: '0.94rem', color: 'var(--text1)' }}>
+                  <strong>Nächste:</strong> {summarizeTimelineEntry(nextEntry)}
+                </p>
+                {next2Entry && (
+                  <p style={{ margin: 0, fontSize: '0.85rem', color: 'var(--text2)' }}>
+                    <strong>Daraufhin:</strong> {summarizeTimelineEntry(next2Entry)}
+                  </p>
+                )}
+              </>
+            ) : (
+              <p style={{ margin: 0, fontSize: '0.95rem', color: 'var(--text2)' }}>
+                Dies war der letzte Eintrag.
+                <br />
+                Gute Arbeit — unten kannst du notieren und Ist-Zeiten speichern.
+              </p>
+            )}
+          </div>
+
+          {currentEntry && (
+            <div className="card training-coach-current" style={{ marginBottom: '14px', padding: '18px 16px' }}>
+              <div style={{ fontSize: '0.78rem', color: 'var(--text3)', marginBottom: '6px' }}>
+                {currentEntry.sec.title || 'Abschnitt'} · Teil {step + 1}
+              </div>
+
+              {currentEntry.item.item_type === 'note' && (
+                <div>
+                  <div style={{ fontSize: '0.8rem', color: 'var(--text3)' }}>Coach-Notiz</div>
+                  <p style={{ fontSize: '1.06rem', lineHeight: 1.52, whiteSpace: 'pre-wrap', marginTop: '8px' }}>{currentEntry.item.note_body || ''}</p>
+                </div>
+              )}
+
+              {currentEntry.item.item_type !== 'note' && (
+                <>
+                  <h2 style={{ fontSize: '1.32rem', lineHeight: 1.35, marginBottom: '10px', fontWeight: 800 }}>
+                    {currentEntry.item.exercise_title ||
+                      (currentEntry.item.exercise_id ? `Übung #${currentEntry.item.exercise_id}` : 'Übung')}
+                    {currentEntry.item.exercise_variant_name ? (
+                      <span style={{ fontWeight: 600, color: 'var(--text2)' }}> ({currentEntry.item.exercise_variant_name})</span>
+                    ) : null}
+                  </h2>
+                  <p style={{ fontSize: '0.9rem', color: 'var(--text3)', marginBottom: '10px' }}>
+                    geplant <strong>{currentEntry.item.planned_duration_min ?? '—'}</strong> Min · Ist (Plan/Bearbeitung):{' '}
+                    <strong>
+                      {durationOverridesForApi[String(currentEntry.item.id)] != null
+                        ? durationOverridesForApi[String(currentEntry.item.id)].actual_duration_min
+                        : currentEntry.item.actual_duration_min ?? '—'}{' '}
+                      Min
+                    </strong>
+                    {durationOverridesForApi[String(currentEntry.item.id)] != null ? ' (Entwurf)' : ''}
+                  </p>
+                  {currentEntry.item.exercise_focus_area && (
+                    <p style={{ fontSize: '0.85rem', color: 'var(--text2)', marginBottom: '10px' }}>
+                      Bereich: {currentEntry.item.exercise_focus_area}
+                    </p>
+                  )}
+                  {currentEntry.item.notes ? (
+                    <div style={{ marginBottom: '12px', padding: '10px', background: 'var(--surface2)', borderRadius: '8px' }}>
+                      <div style={{ fontSize: '0.72rem', textTransform: 'uppercase', color: 'var(--text3)' }}>Zu dieser Platzierung</div>
+                      <p style={{ fontSize: '0.96rem', marginTop: '4px', whiteSpace: 'pre-wrap' }}>{currentEntry.item.notes}</p>
+                    </div>
+                  ) : null}
+                  {currentEntry.item.modifications ? (
+                    <div style={{ marginBottom: '12px', padding: '10px', borderRadius: '8px', border: `1px solid var(--accent)` }}>
+                      <div style={{ fontSize: '0.72rem', textTransform: 'uppercase', color: 'var(--accent-dark)' }}>Anpassung / Variante</div>
+                      <p style={{ fontSize: '0.96rem', marginTop: '4px', whiteSpace: 'pre-wrap' }}>{currentEntry.item.modifications}</p>
+                    </div>
+                  ) : null}
+                  {currentEntry.item.exercise_id ? (
+                    <button type="button" className="btn btn-secondary" onClick={() => setPeekId(currentEntry.item.exercise_id)} style={{ marginTop: '4px' }}>
+                      Übung aus Katalog (Popup)
+                    </button>
+                  ) : null}
+                </>
+              )}
+            </div>
+          )}
+
+          <div className="card training-coach-timer" style={{ marginBottom: '14px', padding: '16px', textAlign: 'center', background: 'var(--surface2)' }}>
+            <div style={{ fontSize: '0.74rem', textTransform: 'uppercase', letterSpacing: '0.08em', color: 'var(--text3)', marginBottom: '8px' }}>Zeitnahme für diesen Punkt</div>
+            <div style={{ fontSize: '2.65rem', fontWeight: 800, letterSpacing: '0.06em', fontVariantNumeric: 'tabular-nums', marginBottom: '14px' }}>
+              {formatClock(tickDisplaySec)}
+            </div>
+            <div style={{ display: 'flex', gap: '10px', flexWrap: 'wrap', justifyContent: 'center', marginBottom: '10px' }}>
+              {!runStartAt ? (
+                <button type="button" className="btn btn-primary" style={{ minWidth: '112px', minHeight: '48px' }} onClick={timerStart}>
+                  Start
+                </button>
+              ) : (
+                <button type="button" className="btn btn-secondary" style={{ minWidth: '112px', minHeight: '48px' }} onClick={timerPause}>
+                  Pause / Stopp
+                </button>
+              )}
+              <button type="button" className="btn btn-secondary" style={{ minHeight: '48px' }} onClick={() => timerReset()}>
+                Zurücksetzen
+              </button>
+            </div>
+            <p style={{ fontSize: '0.82rem', color: 'var(--text2)', marginBottom: '10px' }}>
+              Übernimmt die gemessene Zeit (auf volle Minuten gerundet) als <strong>Ist‑Minuten</strong> für dieses Element und kann später mit „Nachbereitung“ auf dem Server gespeichert werden.
+            </p>
+            <button type="button" className="btn btn-primary" style={{ width: '100%', maxWidth: '400px', minHeight: '48px' }} onClick={applySuggestedDuration}>
+              {`Übernehmen für Ist-Zeit (${Math.max(1, Math.round(elapsedMs / 60000))} Min.)`}
+            </button>
+          </div>
+
+          <div className="training-coach-nav" style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '12px', marginBottom: '14px' }}>
+            <button type="button" className="btn btn-secondary" style={{ minHeight: '52px', fontWeight: 700 }} disabled={step <= 0} onClick={goPrev}>
+              ← zurück
+            </button>
+            <button type="button" className="btn btn-secondary" style={{ minHeight: '52px', fontWeight: 700 }} disabled={step >= timeline.length - 1} onClick={goNext}>
+              weiter →
+            </button>
+          </div>
+
+          <div style={{ marginBottom: '16px', display: 'flex', gap: '10px', flexWrap: 'wrap', alignItems: 'center', justifyContent: 'center' }}>
+            <button type="button" className="btn btn-primary" style={{ flex: '1 1 200px', minHeight: '50px', fontWeight: 700 }} onClick={markCurrentDoneAdvance}>
+              Abgeschlossen &amp; weiter
+            </button>
+          </div>
+
+          {unit.trainer_notes && (
+            <div className="card" style={{ marginBottom: '14px', padding: '14px', borderLeft: '4px solid var(--accent)' }}>
+              <div style={{ fontSize: '0.72rem', fontWeight: 700, color: 'var(--text3)', textTransform: 'uppercase' }}>Trainernotiz (dieser Einheit)</div>
+              <p style={{ fontSize: '0.92rem', marginTop: '6px', whiteSpace: 'pre-wrap', color: 'var(--text2)' }}>{unit.trainer_notes}</p>
+            </div>
+          )}
+
+          <div className="card training-coach-debrief" style={{ padding: '14px', marginBottom: '12px', borderRadius: '10px', borderColor: 'var(--border)' }}>
+            <button
+              type="button"
+              className="btn btn-secondary"
+              style={{ width: '100%', textAlign: 'left', justifyContent: 'space-between', display: 'flex', alignItems: 'center' }}
+              onClick={() => setDebriefOpen(!debriefOpen)}
+            >
+              <span style={{ fontWeight: 700 }}>Nachbereitung &amp; speichern</span>
+              <span>{debriefOpen ? '▼' : '▶'}</span>
+            </button>
+            {debriefOpen && (
+              <>
+                <p style={{ fontSize: '0.82rem', color: 'var(--text2)', margin: '14px 0 10px', lineHeight: 1.5 }}>
+                  Übertragene <strong>Ist‑Minuten</strong> (Entwürfe aus dem Timer oder hier anpassen). Beim Speichern werden sie mit dem Plan an den Server geschickt.
+                </p>
+                <div style={{ display: 'flex', flexDirection: 'column', gap: '10px', marginBottom: '12px' }}>
+                  {timeline
+                    .filter((e) => e.item.item_type === 'exercise')
+                    .map((ent) => {
+                      const k = itemStableKey(ent.item, ent.secOrder, ent.ii)
+                      const val = deltas[k]?.actual_duration_min ?? ent.item.actual_duration_min ?? ''
+                      return (
+                        <label key={k} style={{ display: 'grid', gridTemplateColumns: '1fr 88px', gap: '10px', alignItems: 'center', fontSize: '0.88rem' }}>
+                          <span style={{ wordBreak: 'break-word' }}>{summarizeTimelineEntry(ent)}</span>
+                          <input
+                            type="number"
+                            min="0"
+                            className="form-input"
+                            style={{ margin: 0 }}
+                            value={val === '' || val == null ? '' : String(val)}
+                            placeholder="Min"
+                            onChange={(e) => {
+                              const raw = e.target.value
+                              if (raw === '') mergeDelta(setDeltas, k, { actual_duration_min: null })
+                              else mergeDelta(setDeltas, k, { actual_duration_min: parseInt(raw, 10) })
+                            }}
+                          />
+                        </label>
+                      )
+                    })}
+                </div>
+                <label style={{ display: 'block', marginBottom: '10px', fontSize: '0.88rem', color: 'var(--text2)' }}>
+                  Ergänzung Trainer (wird angehängt · mit Zeitstempel)
+                  <textarea className="form-input" rows={3} value={trainerAppend} onChange={(e) => setTrainerAppend(e.target.value)} style={{ marginTop: '6px' }} />
+                </label>
+                <label style={{ display: 'flex', alignItems: 'center', gap: '8px', marginBottom: '12px', fontSize: '0.88rem' }}>
+                  <input type="checkbox" checked={saveMarkDone} onChange={(e) => setSaveMarkDone(e.target.checked)} />
+                  Einheit als <strong>durchgeführt</strong> markieren
+                </label>
+                {saveOk && (
+                  <p
+                    style={{
+                      fontSize: '0.88rem',
+                      marginBottom: '8px',
+                      color: saveOk.startsWith('Fehler') ? 'var(--danger)' : 'var(--accent-dark)',
+                    }}
+                  >
+                    {saveOk}
+                  </p>
+                )}
+                <button type="button" className="btn btn-primary" style={{ width: '100%', minHeight: '48px' }} disabled={saving} onClick={handleSaveDebrief}>
+                  {saving ? 'Speichert…' : 'Speichern'}
+                </button>
+              </>
+            )}
+          </div>
+        </>
+      )}
+    </div>
+  )
+}
diff --git a/frontend/src/pages/TrainingPlanningPage.jsx b/frontend/src/pages/TrainingPlanningPage.jsx
index d28a220..600071b 100644
--- a/frontend/src/pages/TrainingPlanningPage.jsx
+++ b/frontend/src/pages/TrainingPlanningPage.jsx
@@ -3,6 +3,7 @@ import { Link } from 'react-router-dom'
 import api from '../utils/api'
 import { useAuth } from '../context/AuthContext'
 import ExercisePickerModal from '../components/ExercisePickerModal'
+import ExercisePeekModal from '../components/ExercisePeekModal'
 
 function defaultSection(title = 'Hauptteil') {
   return { title, guidance_notes: '', items: [] }
@@ -186,6 +187,7 @@ function TrainingPlanningPage() {
   const [quickTemplateId, setQuickTemplateId] = useState('')
   const [exercisePickerOpen, setExercisePickerOpen] = useState(false)
   const [exercisePickerTarget, setExercisePickerTarget] = useState(null)
+  const [planningPeekExerciseId, setPlanningPeekExerciseId] = useState(null)
 
   const today = new Date().toISOString().split('T')[0]
   const thirtyDaysLater = new Date(Date.now() + 30 * 24 * 60 * 60 * 1000).toISOString().split('T')[0]
@@ -787,6 +789,13 @@ function TrainingPlanningPage() {
                     >
                       Plan &amp; Ablauf
                     </Link>
+                    <Link
+                      to={`/planning/run/${unit.id}/coach`}
+                      className="btn btn-primary"
+                      style={{ textDecoration: 'none', display: 'inline-flex', alignItems: 'center', justifyContent: 'center' }}
+                    >
+                      Im Training (Coach)
+                    </Link>
                     <button className="btn btn-secondary" onClick={() => handleEdit(unit)}>
                       Bearbeiten
                     </button>
@@ -1095,6 +1104,16 @@ function TrainingPlanningPage() {
                                 >
                                   Übung suchen…
                                 </button>
+                                {it.exercise_id ? (
+                                  <button
+                                    type="button"
+                                    className="btn btn-secondary"
+                                    style={{ margin: 0, whiteSpace: 'nowrap', fontSize: '0.8rem', padding: '6px 10px' }}
+                                    onClick={() => setPlanningPeekExerciseId(it.exercise_id)}
+                                  >
+                                    Katalog kurz zeigen
+                                  </button>
+                                ) : null}
                                 {(it.exercise_title || it.exercise_id) && (
                                     <span
                                       style={{
@@ -1374,6 +1393,11 @@ function TrainingPlanningPage() {
           setExercisePickerTarget(null)
         }}
       />
+      <ExercisePeekModal
+        open={planningPeekExerciseId != null}
+        exerciseId={planningPeekExerciseId}
+        onClose={() => setPlanningPeekExerciseId(null)}
+      />
       </div>
     </div>
   )
diff --git a/frontend/src/pages/TrainingUnitRunPage.jsx b/frontend/src/pages/TrainingUnitRunPage.jsx
index bb4fa4a..57e10a8 100644
--- a/frontend/src/pages/TrainingUnitRunPage.jsx
+++ b/frontend/src/pages/TrainingUnitRunPage.jsx
@@ -4,28 +4,13 @@
 import React, { useCallback, useEffect, useMemo, useState } from 'react'
 import { Link, useNavigate, useParams } from 'react-router-dom'
 import api from '../utils/api'
+import ExercisePeekModal from '../components/ExercisePeekModal'
+import { itemStableKey, sortedSections, sortedItems } from '../utils/trainingPlanUtils'
 
 function storageKey(unitId) {
   return `sj_training_run_checked_${unitId}`
 }
 
-function itemStableKey(it, secOrder, ix) {
-  if (it && it.id != null) return String(it.id)
-  return `${secOrder}-${it?.item_type || 'row'}-${ix}`
-}
-
-function sortedSections(unit) {
-  const raw = unit?.sections
-  if (!Array.isArray(raw)) return []
-  return [...raw].sort((a, b) => (a.order_index ?? 0) - (b.order_index ?? 0))
-}
-
-function sortedItems(sec) {
-  const raw = sec?.items
-  if (!Array.isArray(raw)) return []
-  return [...raw].sort((a, b) => (a.order_index ?? 0) - (b.order_index ?? 0))
-}
-
 function formatMin(m) {
   if (m === null || m === undefined || m === '') return null
   const n = Number(m)
@@ -48,6 +33,7 @@ export default function TrainingUnitRunPage() {
   const [loadError, setLoadError] = useState(null)
   const [loading, setLoading] = useState(true)
   const [checked, setChecked] = useState(() => new Set())
+  const [peekExerciseId, setPeekExerciseId] = useState(null)
 
   const loadChecked = useCallback((uid) => {
     try {
@@ -156,11 +142,24 @@ export default function TrainingUnitRunPage() {
 
   return (
     <div className="training-run-page" style={{ maxWidth: '720px', margin: '0 auto', paddingBottom: '2rem' }}>
-      <nav className="training-run-toolbar no-print" style={{ marginBottom: '1rem', display: 'flex', gap: '0.5rem', flexWrap: 'wrap' }}>
+      <ExercisePeekModal
+        open={peekExerciseId != null}
+        exerciseId={peekExerciseId}
+        onClose={() => setPeekExerciseId(null)}
+      />
+
+      <nav className="training-run-toolbar no-print" style={{ marginBottom: '1rem', display: 'flex', gap: '0.5rem', flexWrap: 'wrap', alignItems: 'center' }}>
         <button type="button" className="btn btn-secondary" onClick={() => navigate('/planning')}>
           Zur Planung
         </button>
-        <button type="button" className="btn btn-primary" onClick={() => window.print()}>
+        <Link
+          to={`/planning/run/${unitId}/coach`}
+          className="btn btn-primary"
+          style={{ textDecoration: 'none', display: 'inline-flex', alignItems: 'center', justifyContent: 'center' }}
+        >
+          Im Training (Coach)
+        </Link>
+        <button type="button" className="btn btn-secondary" onClick={() => window.print()}>
           Drucken / PDF
         </button>
         <button type="button" className="btn btn-secondary" title="Alle Häkchen auf dieser Matte zurücksetzen" onClick={() => confirm('Fortschritt wirklich zurücksetzen?') && clearProgress()}>
@@ -310,9 +309,20 @@ export default function TrainingUnitRunPage() {
                               </div>
                             )}
                             {it.exercise_id && (
-                              <div className="no-print" style={{ marginTop: '0.5rem' }}>
-                                <Link to={`/exercises/${it.exercise_id}`} style={{ fontSize: '0.82rem', color: 'var(--accent)' }}>
-                                  Zur Übung im Katalog
+                              <div className="no-print" style={{ display: 'flex', flexWrap: 'wrap', gap: '10px', marginTop: '0.55rem', alignItems: 'center' }}>
+                                <button
+                                  type="button"
+                                  className="btn btn-secondary"
+                                  style={{ fontSize: '0.82rem', margin: 0 }}
+                                  onClick={() => setPeekExerciseId(it.exercise_id)}
+                                >
+                                  Katalog (Popup)
+                                </button>
+                                <Link
+                                  to={`/exercises/${it.exercise_id}`}
+                                  style={{ fontSize: '0.82rem', color: 'var(--accent)' }}
+                                >
+                                  Vollständige Seite öffnen
                                 </Link>
                               </div>
                             )}
diff --git a/frontend/src/utils/trainingPlanUtils.js b/frontend/src/utils/trainingPlanUtils.js
new file mode 100644
index 0000000..30e896e
--- /dev/null
+++ b/frontend/src/utils/trainingPlanUtils.js
@@ -0,0 +1,107 @@
+/**
+ * Hilfen für Trainingsplan-Ansicht, Coach-Modus und API-Payload für PUT /training-units/:id.
+ */
+
+export function sortedSections(unit) {
+  const raw = unit?.sections
+  if (!Array.isArray(raw)) return []
+  return [...raw].sort((a, b) => (a.order_index ?? 0) - (b.order_index ?? 0))
+}
+
+export function sortedItems(sec) {
+  const raw = sec?.items
+  if (!Array.isArray(raw)) return []
+  return [...raw].sort((a, b) => (a.order_index ?? 0) - (b.order_index ?? 0))
+}
+
+export function itemStableKey(it, secOrder, ix) {
+  if (it && it.id != null) return String(it.id)
+  return `${secOrder}-${it?.item_type || 'row'}-${ix}`
+}
+
+/** Flache Reihenfolge wie auf der Matte: alle Notizen und Übungen nacheinander. */
+export function flattenPlanTimeline(unit) {
+  const list = []
+  sortedSections(unit).forEach((sec, si) => {
+    const secOrder = sec.order_index ?? si
+    sortedItems(sec).forEach((item, ii) => {
+      list.push({
+        si,
+        ii,
+        secOrder,
+        flatIndex: list.length,
+        sec,
+        item,
+      })
+    })
+  })
+  return list
+}
+
+export function summarizeTimelineEntry({ item }) {
+  if (!item) return ''
+  if (item.item_type === 'note') {
+    const t = String(item.note_body || '').trim()
+    return t.length > 72 ? `${t.slice(0, 70)}…` : t || 'Notiz'
+  }
+  const title = item.exercise_title || (item.exercise_id ? `Übung #${item.exercise_id}` : 'Übung')
+  const vn = item.exercise_variant_name ? ` · ${item.exercise_variant_name}` : ''
+  return `${title}${vn}`
+}
+
+/** Payload für PUT (schließt bestehendes Unit mit optionalen Overrides pro Abschnitt-Item-ID ab). */
+export function sectionsToPutPayload(unit, durationOverridesByItemId = {}) {
+  return sortedSections(unit).map((sec, si) => ({
+    order_index: sec.order_index ?? si,
+    title: ((sec.title || '').trim() || 'Abschnitt'),
+    guidance_notes: sec.guidance_notes?.trim() ? sec.guidance_notes.trim() : null,
+    ...(sec.source_template_section_id != null
+      ? { source_template_section_id: sec.source_template_section_id }
+      : {}),
+    items: sortedItems(sec)
+      .map((it, ii) => {
+        if (it.item_type === 'note') {
+          return {
+            item_type: 'note',
+            order_index: it.order_index ?? ii,
+            note_body: it.note_body ?? '',
+          }
+        }
+        const eid = it.exercise_id
+        if (eid === '' || eid == null || Number.isNaN(Number(eid))) {
+          return null
+        }
+        const vid = it.exercise_variant_id
+        let actual =
+          durationOverridesByItemId[String(it.id)]?.actual_duration_min ??
+          it.actual_duration_min
+        if (actual === '' || actual === undefined) actual = null
+        else actual = typeof actual === 'number' ? actual : parseInt(String(actual), 10)
+        if (actual !== null && !Number.isFinite(actual)) actual = null
+
+        return {
+          item_type: 'exercise',
+          order_index: it.order_index ?? ii,
+          exercise_id: parseInt(String(eid), 10),
+          exercise_variant_id:
+            vid !== '' && vid != null && !Number.isNaN(Number(vid)) ? parseInt(String(vid), 10) : null,
+          planned_duration_min: coalescePositiveInt(it.planned_duration_min),
+          actual_duration_min: actual,
+          notes: trimOrNull(it.notes),
+          modifications: trimOrNull(it.modifications),
+        }
+      })
+      .filter(Boolean),
+  }))
+}
+
+function coalescePositiveInt(v) {
+  if (v === '' || v === null || v === undefined) return null
+  const n = parseInt(String(v), 10)
+  return Number.isFinite(n) ? n : null
+}
+
+function trimOrNull(v) {
+  const s = v != null ? String(v).trim() : ''
+  return s ? s : null
+}
diff --git a/frontend/src/version.js b/frontend/src/version.js
index 34e727d..301e0f7 100644
--- a/frontend/src/version.js
+++ b/frontend/src/version.js
@@ -10,8 +10,9 @@ export const PAGE_VERSIONS = {
   ExercisesPage: "1.1.0",  // Updated: Katalog-Integration
   ClubsPage: "1.0.0",
   SkillsPage: "1.0.0",
-  TrainingPlanningPage: "1.2.0",
-  TrainingUnitRunPage: "1.0.0",
+  TrainingPlanningPage: "1.3.0",
+  TrainingUnitRunPage: "1.1.0",
+  TrainingCoachPage: "1.0.0",
   AdminCatalogsPage: "2.2.0",  // Updated: Frontend API Calls & Field Names für renamed tables
   TrainerContextsPage: "1.0.0",  // New: Trainer-Kontext-Verwaltung
 }