diff --git a/backend/routers/training_planning.py b/backend/routers/training_planning.py
index baac6d3..49e492f 100644
--- a/backend/routers/training_planning.py
+++ b/backend/routers/training_planning.py
@@ -8,6 +8,7 @@ from datetime import date, timedelta
 from typing import Any, Dict, List, Optional
 
 from fastapi import APIRouter, Depends, HTTPException, Query
+from psycopg2.extras import Json as PsycopgJson
 
 from db import get_db, get_cursor, r2d
 from tenant_context import TenantContext, get_tenant_context, library_content_visibility_sql
@@ -771,6 +772,7 @@ def _insert_section_items(cur, section_id: int, items_in: Optional[List[Any]], s
         planning_mp = _normalize_planning_method_profile_payload(raw.get("planning_method_profile"))
         if ek != "combination":
             planning_mp = None
+        planning_sql_val = PsycopgJson(planning_mp) if planning_mp is not None else None
         src_mod = _optional_source_training_module_id_payload(raw.get("source_training_module_id"))
         cur.execute(
             """
@@ -793,7 +795,7 @@ def _insert_section_items(cur, section_id: int, items_in: Optional[List[Any]], s
                 raw.get("notes"),
                 raw.get("modifications"),
                 src_mod,
-                planning_mp,
+                planning_sql_val,
             ),
         )
 
diff --git a/frontend/src/app.css b/frontend/src/app.css
index a9fcbfd..fb4d05e 100644
--- a/frontend/src/app.css
+++ b/frontend/src/app.css
@@ -6327,13 +6327,31 @@ a.analysis-split__nav-item {
   gap: 10px;
 }
 .combo-plan-bracket__station {
-  display: block;
+  display: flex;
+  gap: 10px;
+  align-items: flex-start;
   padding: 10px 10px;
   border-radius: 10px;
   border: 1px solid var(--border);
   background: var(--surface2);
 }
+.combo-plan-bracket__station-load {
+  flex-shrink: 0;
+  min-width: 3rem;
+  max-width: 5rem;
+  padding: 7px 8px;
+  border-radius: 8px;
+  font-size: 0.78rem;
+  font-weight: 700;
+  line-height: 1.2;
+  text-align: center;
+  align-self: flex-start;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  color: var(--accent-dark);
+}
 .combo-plan-bracket__station-main {
+  flex: 1;
   min-width: 0;
 }
 .combo-plan-bracket__station-title {
@@ -6447,6 +6465,11 @@ a.analysis-split__nav-item {
     border-color: #444 !important;
     background: #f4f6f8 !important;
   }
+  .combo-plan-bracket__station-load {
+    border-color: #444 !important;
+    background: #fff !important;
+    color: #06352a !important;
+  }
 }
 
 /* Coach — volle Übung, Nur-Mittelbereich scrollt; Steuerung oben/unten sichtbar */
diff --git a/frontend/src/components/CombinationPlanBracket.jsx b/frontend/src/components/CombinationPlanBracket.jsx
index 7c919dd..fa63cc6 100644
--- a/frontend/src/components/CombinationPlanBracket.jsx
+++ b/frontend/src/components/CombinationPlanBracket.jsx
@@ -7,7 +7,12 @@ import {
   combinationArchetypeLabel,
   sortCombinationSlotsForDisplay,
 } from '../constants/combinationArchetypes'
-import { describeGlobalComboProfile, effectiveStationTimingSummary, readSlotProfilesV1 } from '../utils/combinationMethodProfileUi'
+import {
+  describeGlobalComboProfile,
+  effectiveStationTimingSummary,
+  readSlotProfilesV1,
+  stationPrimaryLoadLabel,
+} from '../utils/combinationMethodProfileUi'
 
 function candidateLine(slot) {
   const cands = slot.candidates
@@ -93,10 +98,18 @@ export default function CombinationPlanBracket({
             const displayStep = si + 1
             const stationTitle = ((slot.title || '').trim() || `Station ${displayStep}`).trim()
             const names = candidateLine(slot)
-            const timing = effectiveStationTimingSummary(arch, methodProfile || {}, timingByIx.get(stationIx))
+            const slotProfRow = timingByIx.get(stationIx)
+            const loadBadge = stationPrimaryLoadLabel(slotProfRow)
+            const timing = effectiveStationTimingSummary(arch, methodProfile || {}, slotProfRow)
 
             return (
               <li key={`slot-${stationIx}-${si}`} className="combo-plan-bracket__station">
+                <div
+                  className="combo-plan-bracket__station-load"
+                  title={loadBadge ? 'Belastung je Station (Sekunden oder Wiederholungen)' : undefined}
+                >
+                  {loadBadge || '—'}
+                </div>
                 <div className="combo-plan-bracket__station-main">
                   <div className="combo-plan-bracket__station-title">{stationTitle}</div>
                   <div className="combo-plan-bracket__station-exercises">{names || '(keine Einzelübung)'}</div>
diff --git a/frontend/src/components/TrainingUnitSectionsEditor.jsx b/frontend/src/components/TrainingUnitSectionsEditor.jsx
index 9493f42..6431ee1 100644
--- a/frontend/src/components/TrainingUnitSectionsEditor.jsx
+++ b/frontend/src/components/TrainingUnitSectionsEditor.jsx
@@ -5,6 +5,7 @@ import CombinationPlanBracket from './CombinationPlanBracket'
 import { comboPlanningProfileJsonForEditor, effectiveComboMethodProfile } from '../utils/comboPlanningMethodProfile'
 import { combinationArchetypeLabel, sortCombinationSlotsForDisplay } from '../constants/combinationArchetypes'
 import {
+  cloneJsonSerializablePlanningProfile,
   comboSlotsOutlineForProfileEditor,
   defaultSection,
   exerciseRow,
@@ -1246,11 +1247,6 @@ export default function TrainingUnitSectionsEditor({
                             <strong style={{ color: 'var(--text1)', fontWeight: 600 }}>Archetyp:&nbsp;</strong>
                             <span style={{ color: 'var(--text1)' }}>
                               {stripArchLbl || stripArchRaw || '—'}
-                              {stripArchRaw && stripArchLbl && stripArchLbl !== stripArchRaw ? (
-                                <span style={{ marginLeft: 6, fontWeight: 400, color: 'var(--text3)', fontSize: '0.72rem' }}>
-                                  ({stripArchRaw})
-                                </span>
-                              ) : null}
                             </span>
                             <span style={{ marginLeft: 10, fontWeight: 500 }}>{compactComboPlanningCaption(it)}</span>
                           </div>
@@ -1628,7 +1624,13 @@ export default function TrainingUnitSectionsEditor({
                     try {
                       const obj = JSON.parse(json || '{}')
                       if (obj && typeof obj === 'object' && !Array.isArray(obj)) {
-                        updateItem(comboPlanningModalSX, comboPlanningModalIX, 'planning_method_profile', obj)
+                        const cleaned = cloneJsonSerializablePlanningProfile(obj) ?? {}
+                        updateItem(
+                          comboPlanningModalSX,
+                          comboPlanningModalIX,
+                          'planning_method_profile',
+                          Object.keys(cleaned).length ? cleaned : null,
+                        )
                       }
                     } catch {
                       /* Ungültiges JSON — Hinweis im Editor */
diff --git a/frontend/src/utils/combinationMethodProfileUi.js b/frontend/src/utils/combinationMethodProfileUi.js
index d5a8b9f..4e145b2 100644
--- a/frontend/src/utils/combinationMethodProfileUi.js
+++ b/frontend/src/utils/combinationMethodProfileUi.js
@@ -322,6 +322,27 @@ export function summarizeSlotProfileBrief(r) {
   return bits.join(' · ')
 }
 
+/**
+ * Kompakte Stations-Belastung für die Plan-Klammer (links): Sekunden oder Wdh., nicht Slot-ID.
+ */
+export function stationPrimaryLoadLabel(slotRow) {
+  if (!slotRow || typeof slotRow !== 'object') return null
+  const adv = slotRow.advance_mode || 'timed'
+  if (adv === 'timed') {
+    if (slotRow.load_sec != null) return `${slotRow.load_sec}s`
+    return null
+  }
+  if (adv === 'rep') {
+    if (slotRow.consecutive_reps != null) return `${slotRow.consecutive_reps}×`
+    return null
+  }
+  if (adv === 'manual') {
+    if (slotRow.consecutive_reps != null) return `~${slotRow.consecutive_reps}×`
+    return null
+  }
+  return null
+}
+
 function globalTimingHintsForArchetype(arch, mp) {
   if (!mp || typeof mp !== 'object' || Array.isArray(mp)) return []
   const bits = []
diff --git a/frontend/src/utils/comboPlanningMethodProfile.js b/frontend/src/utils/comboPlanningMethodProfile.js
index 7ff6e7f..e461284 100644
--- a/frontend/src/utils/comboPlanningMethodProfile.js
+++ b/frontend/src/utils/comboPlanningMethodProfile.js
@@ -1,5 +1,28 @@
 /** Effektives Ablaufprofil für Kombination im Coach/in der Planung */
 
+/** Top-Level: null/undefined aus Planungs-Snapshot löschen keine Katalog-Felder (API liefert oft JSON-null). */
+function omitNullUndefinedTop(planObj) {
+  const out = {}
+  for (const [k, v] of Object.entries(planObj)) {
+    if (v === null || v === undefined) continue
+    out[k] = v
+  }
+  return out
+}
+
+/** Je Slot-Zeile: null/undefined aus Planung überschreiben keine Katalog-Werte (z. B. consecutive_reps). */
+function mergeSlotProfileFields(prev, patch) {
+  const base = prev && typeof prev === 'object' ? { ...prev } : {}
+  if (!patch || typeof patch !== 'object') return base
+  for (const [k, v] of Object.entries(patch)) {
+    if (v === null || v === undefined) continue
+    base[k] = v
+  }
+  const ix = Number(base.slot_index)
+  if (Number.isFinite(ix)) base.slot_index = ix
+  return base
+}
+
 /**
  * Vereinigt slot_profiles_v1 aus Katalog und Planungs-Overlay (je slot_index).
  * @param {unknown} catArr
@@ -20,7 +43,7 @@ function mergeSlotProfilesV1(catArr, planArr) {
     const ix = Number(r.slot_index)
     if (!Number.isFinite(ix)) continue
     const prev = byIx.get(ix) || {}
-    byIx.set(ix, { ...prev, ...r })
+    byIx.set(ix, mergeSlotProfileFields(prev, r))
   }
   return [...byIx.entries()].sort((a, b) => a[0] - b[0]).map(([, row]) => row)
 }
@@ -34,20 +57,30 @@ export function effectiveComboMethodProfile(catalogDict, planningSnapshot) {
   const cat =
     catalogDict && typeof catalogDict === 'object' && !Array.isArray(catalogDict) ? { ...catalogDict } : {}
 
-  if (
-    planningSnapshot === null ||
-    planningSnapshot === undefined ||
-    typeof planningSnapshot !== 'object' ||
-    Array.isArray(planningSnapshot)
-  ) {
+  if (planningSnapshot === null || planningSnapshot === undefined) {
     return { ...cat }
   }
 
-  const plan = planningSnapshot
-  const merged = { ...cat, ...plan }
+  if (typeof planningSnapshot === 'string') {
+    const t = planningSnapshot.trim()
+    if (!t || t === 'null') return { ...cat }
+    try {
+      const p = JSON.parse(t)
+      return effectiveComboMethodProfile(catalogDict, p)
+    } catch {
+      return { ...cat }
+    }
+  }
 
-  if (Object.prototype.hasOwnProperty.call(plan, 'slot_profiles_v1')) {
-    merged.slot_profiles_v1 = mergeSlotProfilesV1(cat.slot_profiles_v1, plan.slot_profiles_v1)
+  if (typeof planningSnapshot !== 'object' || Array.isArray(planningSnapshot)) {
+    return { ...cat }
+  }
+
+  const planRaw = planningSnapshot
+  const merged = { ...cat, ...omitNullUndefinedTop(planRaw) }
+
+  if (Object.prototype.hasOwnProperty.call(planRaw, 'slot_profiles_v1')) {
+    merged.slot_profiles_v1 = mergeSlotProfilesV1(cat.slot_profiles_v1, planRaw.slot_profiles_v1)
   }
 
   return merged
diff --git a/frontend/src/utils/trainingPlanUtils.js b/frontend/src/utils/trainingPlanUtils.js
index 3e88e59..db4139d 100644
--- a/frontend/src/utils/trainingPlanUtils.js
+++ b/frontend/src/utils/trainingPlanUtils.js
@@ -2,6 +2,7 @@
  * Hilfen für Trainingsplan-Ansicht, Coach-Modus und API-Payload für PUT /training-units/:id.
  */
 
+import { cloneJsonSerializablePlanningProfile } from './trainingUnitSectionsForm'
 export function sortedSections(unit) {
   const raw = unit?.sections
   if (!Array.isArray(raw)) return []
@@ -95,7 +96,10 @@ export function sectionsToPutPayload(unit, durationOverridesByItemId = {}) {
         if (isCombo) {
           const pmp = it.planning_method_profile
           if (pmp != null && typeof pmp === 'object' && !Array.isArray(pmp)) {
-            row.planning_method_profile = { ...pmp }
+            const cleaned = cloneJsonSerializablePlanningProfile(pmp)
+            if (cleaned && Object.keys(cleaned).length > 0) {
+              row.planning_method_profile = cleaned
+            }
           }
         }
         return row
diff --git a/frontend/src/utils/trainingUnitSectionsForm.js b/frontend/src/utils/trainingUnitSectionsForm.js
index f0f2be9..ecfacaa 100644
--- a/frontend/src/utils/trainingUnitSectionsForm.js
+++ b/frontend/src/utils/trainingUnitSectionsForm.js
@@ -10,13 +10,34 @@ function normalizeCatalogMethodProfile(cp) {
   return {}
 }
 
-/** NULL = Planung folgt Katalogprofil der Übung */
+/** NULL = Planung folgt Katalogprofil der Übung (Reihenfolge beibehalten: zuerst String-JSON auflösen). */
 function normalizePlanningMethodProfile(pm) {
   if (pm == null) return null
+  if (typeof pm === 'string') {
+    const t = pm.trim()
+    if (!t || t === 'null') return null
+    try {
+      const p = JSON.parse(t)
+      if (p && typeof p === 'object' && !Array.isArray(p)) return { ...p }
+      return null
+    } catch {
+      return null
+    }
+  }
   if (typeof pm === 'object' && !Array.isArray(pm)) return { ...pm }
   return null
 }
 
+/** Reines JSON für PUT /training-units (vermeidet nicht serialisierbare Werte → 500). */
+export function cloneJsonSerializablePlanningProfile(obj) {
+  if (obj == null || typeof obj !== 'object' || Array.isArray(obj)) return null
+  try {
+    return JSON.parse(JSON.stringify(obj))
+  } catch {
+    return {}
+  }
+}
+
 export function exerciseRow() {
   return {
     item_type: 'exercise',
@@ -414,7 +435,10 @@ export function buildSectionsPayload(sections) {
         if (isCombo) {
           const pmp = it.planning_method_profile
           if (pmp != null && typeof pmp === 'object' && !Array.isArray(pmp)) {
-            rowEx.planning_method_profile = { ...pmp }
+            const cleaned = cloneJsonSerializablePlanningProfile(pmp)
+            if (cleaned && Object.keys(cleaned).length > 0) {
+              rowEx.planning_method_profile = cleaned
+            }
           }
         }
         if (smEx != null) rowEx.source_training_module_id = smEx