diff --git a/backend/migrations/010_rename_training_styles_to_style_directions.sql b/backend/migrations/010_rename_training_styles_to_style_directions.sql
new file mode 100644
index 0000000..bfea830
--- /dev/null
+++ b/backend/migrations/010_rename_training_styles_to_style_directions.sql
@@ -0,0 +1,67 @@
+-- Migration 010: Umbenennung "training_styles" → "style_directions"
+-- Erstellt: 2026-04-23
+-- Beschreibung: Konsistente Terminologie - "Stilrichtungen" statt "Trainingsstile"
+-- Grund: "Trainingsstil" wird neue separate Dimension (Breitensport/Leistungssport)
+
+-- ============================================================================
+-- PHASE 1: Tabellen umbenennen
+-- ============================================================================
+
+-- Haupttabelle umbenennen
+ALTER TABLE IF EXISTS training_styles RENAME TO style_directions;
+
+-- Junction-Tabelle umbenennen
+ALTER TABLE IF EXISTS exercise_styles RENAME TO exercise_style_directions;
+
+-- Training-Style-Target-Groups Junction umbenennen
+ALTER TABLE IF EXISTS training_style_target_groups RENAME TO style_direction_target_groups;
+
+-- ============================================================================
+-- PHASE 2: Spalten umbenennen
+-- ============================================================================
+
+-- In style_directions (vormals training_styles)
+-- Keine Spalten-Umbennung nötig - parent_style_id kann bleiben (bedeutet parent_direction)
+
+-- In exercise_style_directions (vormals exercise_styles)
+DO $$
+BEGIN
+    IF EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'exercise_style_directions' AND column_name = 'training_style_id'
+    ) THEN
+        ALTER TABLE exercise_style_directions
+        RENAME COLUMN training_style_id TO style_direction_id;
+    END IF;
+END $$;
+
+-- In style_direction_target_groups (vormals training_style_target_groups)
+DO $$
+BEGIN
+    IF EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'style_direction_target_groups' AND column_name = 'training_style_id'
+    ) THEN
+        ALTER TABLE style_direction_target_groups
+        RENAME COLUMN training_style_id TO style_direction_id;
+    END IF;
+END $$;
+
+-- ============================================================================
+-- PHASE 3: Constraints umbenennen (automatisch durch ALTER TABLE)
+-- ============================================================================
+
+-- Foreign Key Constraints werden automatisch umbenannt
+-- Indizes werden automatisch umbenannt
+
+-- ============================================================================
+-- PHASE 4: Validierung
+-- ============================================================================
+
+-- Nach dieser Migration:
+-- - training_styles → style_directions
+-- - exercise_styles → exercise_style_directions
+-- - training_style_target_groups → style_direction_target_groups
+-- - training_style_id → style_direction_id (in Junction-Tabellen)
+
+-- Nächste Migration 011: Neue Dimension "training_types" (Breitensport/Leistungssport)
diff --git a/backend/migrations/011_create_training_types.sql b/backend/migrations/011_create_training_types.sql
new file mode 100644
index 0000000..da3a737
--- /dev/null
+++ b/backend/migrations/011_create_training_types.sql
@@ -0,0 +1,65 @@
+-- Migration 011: Neue Dimension "Trainingsstil" (Breitensport/Leistungssport)
+-- Erstellt: 2026-04-23
+-- Beschreibung: Neue Katalog-Dimension für Trainingsausrichtung
+-- Grund: Trennung von "Stilrichtung" (Shotokan) und "Trainingsstil" (Breitensport)
+
+-- ============================================================================
+-- PHASE 1: Haupttabelle erstellen
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS training_types (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(100) UNIQUE NOT NULL,
+    abbreviation VARCHAR(20),
+    description TEXT,
+    sort_order INT DEFAULT 99,
+    status VARCHAR(50) DEFAULT 'active' CHECK (status IN ('active', 'archived')),
+    created_at TIMESTAMP DEFAULT NOW(),
+    updated_at TIMESTAMP DEFAULT NOW()
+);
+
+-- ============================================================================
+-- PHASE 2: Seed-Daten
+-- ============================================================================
+
+INSERT INTO training_types (name, abbreviation, description, sort_order) VALUES
+    ('Breitensport', 'BS', 'Freizeitorientiertes Training für Gesundheit und Spaß', 1),
+    ('Leistungssport', 'LS', 'Wettkampforientiertes Training mit Leistungsfokus', 2),
+    ('Wettkampf', 'WK', 'Spezifische Wettkampfvorbereitung', 3)
+ON CONFLICT (name) DO NOTHING;
+
+-- ============================================================================
+-- PHASE 3: Junction-Tabelle für M:N Übungszuordnung
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS exercise_training_types (
+    id SERIAL PRIMARY KEY,
+    exercise_id INT REFERENCES exercises(id) ON DELETE CASCADE,
+    training_type_id INT REFERENCES training_types(id) ON DELETE RESTRICT,
+    is_primary BOOLEAN DEFAULT false,
+    created_at TIMESTAMP DEFAULT NOW(),
+    UNIQUE(exercise_id, training_type_id)
+);
+
+-- ============================================================================
+-- PHASE 4: Indizes
+-- ============================================================================
+
+CREATE INDEX IF NOT EXISTS idx_exercise_training_types_exercise
+    ON exercise_training_types(exercise_id);
+
+CREATE INDEX IF NOT EXISTS idx_exercise_training_types_type
+    ON exercise_training_types(training_type_id);
+
+CREATE INDEX IF NOT EXISTS idx_exercise_training_types_primary
+    ON exercise_training_types(is_primary);
+
+-- ============================================================================
+-- PHASE 5: Validierung
+-- ============================================================================
+
+-- Nach dieser Migration:
+-- - Neue Dimension "training_types" (Breitensport, Leistungssport, Wettkampf)
+-- - M:N Zuordnung zu Übungen über exercise_training_types
+-- - is_primary Flag für Haupt-Trainingsstil
+-- - ON DELETE RESTRICT: Training Types können nicht gelöscht werden wenn zugeordnet
diff --git a/backend/version.py b/backend/version.py
index 3b62e38..2b87d67 100644
--- a/backend/version.py
+++ b/backend/version.py
@@ -1,6 +1,6 @@
 # Shinkan Jinkendo Version Information
 
-APP_VERSION = "0.3.4"
+APP_VERSION = "0.4.0"
 BUILD_DATE = "2026-04-23"
 DB_SCHEMA_VERSION = "20260423"
 
@@ -22,6 +22,19 @@ MODULE_VERSIONS = {
 }
 
 CHANGELOG = [
+    {
+        "version": "0.4.0",
+        "date": "2026-04-23",
+        "changes": [
+            "BREAKING: Migration 010 - Umbenennung training_styles → style_directions",
+            "BREAKING: Migration 011 - Neue Dimension training_types (Breitensport/Leistungssport)",
+            "DB: Konsistente Terminologie - Stilrichtungen vs. Trainingsstile",
+            "DB: Neue Tabelle training_types mit Seed-Daten (Breitensport, Leistungssport, Wettkampf)",
+            "DB: Neue Junction-Tabelle exercise_training_types (M:N)",
+            "Architektur: Fokusbereich → Stilrichtung → Trainingsstil → Zielgruppe (alle M:N)",
+            "Phase 1: Nur Datenbank-Migrationen - Backend/Frontend-Updates folgen",
+        ]
+    },
     {
         "version": "0.3.4",
         "date": "2026-04-23",