diff --git a/.pm-checkpoint.json b/.pm-checkpoint.json
index c42c6aa..0935566 100644
--- a/.pm-checkpoint.json
+++ b/.pm-checkpoint.json
@@ -1,13 +1,20 @@
 {
-  "lastRun": "2026-03-01T17:38:00+01:00",
+  "lastRun": "2026-03-01T20:42:00+01:00",
   "status": "completed",
   "phase": "04-workout-modification",
-  "activeTask": "04-03-frontend-workout-edit",
-  "tasksCompleted": ["01-input-ux", "02-flexible-sets", "03-design-polish", "04-01-schema-migration", "04-02-backend-api", "04-03-frontend-workout-edit"],
-  "nextTask": "04-04-visual-distinction",
-  "agentSession": "claude-code-frontend",
-  "agentType": "claude-code-local-exec",
-  "spawnTime": "2026-03-01T17:38:00+01:00",
-  "result": "Phase 04-03 complete. Edit workflow implemented: ExercisePicker modal, swap/add/remove exercise flows, fork confirmation dialog, API integration (POST/PUT custom-workouts). All success criteria met. Ready for 04-04.",
-  "notes": "Previous attempt hit Gemini quota limit. Recovered at 17:38. Advancing to 04-04: Add visual distinction badges (custom vs program) on WorkoutSelectPage."
+  "activeTask": "04-05-reset-to-original",
+  "tasksCompleted": ["01-input-ux", "02-flexible-sets", "03-design-polish", "04-01-schema-migration", "04-02-backend-api", "04-03-frontend-workout-edit", "04-04-visual-distinction", "04-05-reset-to-original"],
+  "nextTask": "04-06-persistence-improvements",
+  "agentSession": "local-exec",
+  "agentType": "gravl-pm-cron",
+  "spawnTime": "2026-03-01T20:42:00+01:00",
+  "result": "Phase 04-05 complete. Reset to Original feature fully implemented. Changes: 1) Added refresh button to custom workout cards (visible only on 'Anpassad' workouts). 2) Implemented handleResetClick + handleConfirmReset flow with confirmation dialog ('Är du säker? Dina ändringar kommer att försvinna...'). 3) DELETE /api/custom-workouts/:id endpoint verified (exists in backend). 4) Added CSS styling: .reset-btn (orange icon button with hover effects), .success-message (green slide-down animation), .modal-overlay/.modal-dialog/.modal-btn (reusable confirmation dialog). 5) Added refresh icon to Icons.jsx SVG library. Frontend build successful with no errors.",
+  "notes": "Task 04-05 complete. Custom workouts can now be reset to original program versions. User gets confirmation dialog before deletion. UI updates show badge change from 'Anpassad' to 'Program' after reset. Next: 04-06 (persistence improvements or advanced features like workout export/backup).",
+  "filesModified": [
+    "frontend/src/pages/WorkoutSelectPage.jsx",
+    "frontend/src/App.css",
+    "frontend/src/components/Icons.jsx"
+  ],
+  "buildStatus": "success",
+  "buildTime": "3.59s"
 }
diff --git a/frontend/src/App.css b/frontend/src/App.css
index 1893ffc..33ef817 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -2998,3 +2998,173 @@
 .workout-select-card:hover .workout-badge {
   box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
 }
+
+/* Reset button for custom workouts */
+.reset-btn {
+  position: absolute;
+  top: -8px;
+  right: -8px;
+  width: 32px;
+  height: 32px;
+  border-radius: var(--radius-full);
+  background: var(--accent);
+  border: 2px solid var(--bg-primary);
+  color: white;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  box-shadow: 0 2px 8px rgba(255, 107, 74, 0.3);
+  padding: 0;
+  min-width: 32px;
+  min-height: 32px;
+}
+
+.reset-btn:hover {
+  background: #e85a3c;
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(255, 107, 74, 0.4);
+}
+
+.reset-btn:active {
+  transform: scale(0.95);
+}
+
+/* Success message */
+.success-message {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  padding: var(--space-3) var(--space-4);
+  background: linear-gradient(135deg, var(--success), #16a34a);
+  color: white;
+  border-radius: var(--radius-lg);
+  margin-bottom: var(--space-4);
+  animation: slideDown 0.3s ease;
+  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.2);
+}
+
+@keyframes slideDown {
+  from {
+    opacity: 0;
+    transform: translateY(-10px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+/* Modal dialog styles */
+.modal-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+  animation: fadeIn 0.2s ease;
+}
+
+@keyframes fadeIn {
+  from { opacity: 0; }
+  to { opacity: 1; }
+}
+
+.modal-dialog {
+  background: var(--bg-primary);
+  border-radius: var(--radius-xl);
+  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
+  max-width: 400px;
+  width: 90%;
+  animation: slideUp 0.3s ease;
+  overflow: hidden;
+}
+
+@keyframes slideUp {
+  from {
+    opacity: 0;
+    transform: translateY(20px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.modal-header {
+  padding: var(--space-4);
+  border-bottom: 1px solid var(--border);
+}
+
+.modal-header h2 {
+  font-size: var(--font-lg);
+  font-weight: 700;
+  margin: 0;
+  color: var(--text-primary);
+}
+
+.modal-body {
+  padding: var(--space-4);
+}
+
+.modal-body p {
+  font-size: var(--font-md);
+  color: var(--text-secondary);
+  line-height: 1.5;
+  margin: 0;
+}
+
+.modal-footer {
+  padding: var(--space-4);
+  border-top: 1px solid var(--border);
+  display: flex;
+  gap: var(--space-2);
+  justify-content: flex-end;
+}
+
+.modal-btn {
+  padding: var(--space-2) var(--space-4);
+  border-radius: var(--radius-md);
+  border: none;
+  cursor: pointer;
+  font-size: var(--font-md);
+  font-weight: 600;
+  transition: all 0.2s ease;
+  min-height: 40px;
+}
+
+.modal-btn:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.modal-btn.cancel {
+  background: var(--bg-secondary);
+  color: var(--text-primary);
+  border: 1px solid var(--border);
+}
+
+.modal-btn.cancel:hover:not(:disabled) {
+  background: var(--bg-tertiary);
+  border-color: var(--border);
+}
+
+.modal-btn.confirm {
+  background: var(--accent);
+  color: white;
+}
+
+.modal-btn.confirm:hover:not(:disabled) {
+  background: #e85a3c;
+  box-shadow: 0 4px 12px rgba(255, 107, 74, 0.3);
+}
+
+.modal-btn.confirm:active:not(:disabled) {
+  transform: scale(0.98);
+}
diff --git a/frontend/src/components/Icons.jsx b/frontend/src/components/Icons.jsx
index 4a59f61..ef37a01 100644
--- a/frontend/src/components/Icons.jsx
+++ b/frontend/src/components/Icons.jsx
@@ -261,6 +261,12 @@ export const Icons = {
       <line x1="8" y1="8" x2="16" y2="16"/>
     </svg>
   ),
+  refresh: (
+    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+      <path d="M1 4v6h6M23 20v-6h-6"/>
+      <path d="M20.49 9A9 9 0 0 0 5.64 5.64L1 10m22 4l-4.64 4.36A9 9 0 0 1 3.51 15"/>
+    </svg>
+  ),
 }
 
 // Icon component wrapper
diff --git a/frontend/src/pages/WorkoutSelectPage.jsx b/frontend/src/pages/WorkoutSelectPage.jsx
index 564c804..8967f9b 100644
--- a/frontend/src/pages/WorkoutSelectPage.jsx
+++ b/frontend/src/pages/WorkoutSelectPage.jsx
@@ -20,12 +20,23 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
   const [customWorkouts, setCustomWorkouts] = useState([])
   const [loading, setLoading] = useState(true)
   const [selectedWorkout, setSelectedWorkout] = useState(null)
+  const [resetConfirm, setResetConfirm] = useState(null)
+  const [resetting, setResetting] = useState(false)
+  const [successMessage, setSuccessMessage] = useState(null)
 
   useEffect(() => {
     fetchProgram()
     fetchCustomWorkouts()
   }, [])
 
+  // Auto-clear success message after 3 seconds
+  useEffect(() => {
+    if (successMessage) {
+      const timer = setTimeout(() => setSuccessMessage(null), 3000)
+      return () => clearTimeout(timer)
+    }
+  }, [successMessage])
+
   const fetchProgram = async () => {
     try {
       const res = await fetch(`${API_URL}/programs/1`)
@@ -52,6 +63,11 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
     }
   }
 
+  const getCustomWorkoutId = (programDayId) => {
+    const customWorkout = customWorkouts.find(cw => cw.source_program_day_id === programDayId)
+    return customWorkout?.id
+  }
+
   const isWorkoutCustom = (programDayId) => {
     return customWorkouts.some(cw => cw.source_program_day_id === programDayId)
   }
@@ -66,6 +82,38 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
     }
   }
 
+  const handleResetClick = (e, workoutId) => {
+    e.stopPropagation()
+    setResetConfirm(workoutId)
+  }
+
+  const handleConfirmReset = async () => {
+    if (!resetConfirm) return
+
+    setResetting(true)
+    try {
+      const token = localStorage.getItem('token')
+      const res = await fetch(`${API_URL}/custom-workouts/${resetConfirm}`, {
+        method: 'DELETE',
+        headers: { 'Authorization': `Bearer ${token}` }
+      })
+
+      if (res.ok) {
+        // Refresh custom workouts list
+        await fetchCustomWorkouts()
+        setSuccessMessage('Passet återställdes till original')
+        setSelectedWorkout(null)
+        setResetConfirm(null)
+      } else {
+        console.error('Failed to reset workout:', res.status)
+      }
+    } catch (err) {
+      console.error('Error resetting workout:', err)
+    } finally {
+      setResetting(false)
+    }
+  }
+
   if (loading) {
     return (
       <div className="select-page loading">
@@ -90,6 +138,13 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
           Vilken träning vill du köra idag?
         </p>
 
+        {successMessage && (
+          <div className="success-message">
+            <Icon name="check" size={18} />
+            {successMessage}
+          </div>
+        )}
+
         <div className="workout-grid">
           {program?.days?.map((workout) => {
             const iconName = getWorkoutIconName(workout.name)
@@ -97,6 +152,7 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
             const isSelected = selectedWorkout?.id === workout.id
             const exerciseCount = workout.exercises?.filter(e => e.name).length || 0
             const isCustom = isWorkoutCustom(workout.id)
+            const customWorkoutId = getCustomWorkoutId(workout.id)
 
             return (
               <div
@@ -112,6 +168,16 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
                   <span className={`workout-badge ${isCustom ? 'custom' : 'program'}`}>
                     {isCustom ? 'Anpassad' : 'Program'}
                   </span>
+                  {isCustom && (
+                    <button
+                      className="reset-btn"
+                      title="Återställ till original"
+                      onClick={(e) => handleResetClick(e, customWorkoutId)}
+                      aria-label="Återställ workout"
+                    >
+                      <Icon name="refresh" size={16} />
+                    </button>
+                  )}
                 </div>
                 <div className="workout-details">
                   <h3>{workout.name}</h3>
@@ -146,6 +212,36 @@ function WorkoutSelectPage({ onBack, onSelectWorkout }) {
           </div>
         )}
       </main>
+
+      {/* Reset confirmation dialog */}
+      {resetConfirm && (
+        <div className="modal-overlay" onClick={() => setResetConfirm(null)}>
+          <div className="modal-dialog" onClick={(e) => e.stopPropagation()}>
+            <div className="modal-header">
+              <h2>Återställ till original?</h2>
+            </div>
+            <div className="modal-body">
+              <p>Är du säker? Dina ändringar kommer att försvinna och passet återställs till programversionen.</p>
+            </div>
+            <div className="modal-footer">
+              <button
+                className="modal-btn cancel"
+                onClick={() => setResetConfirm(null)}
+                disabled={resetting}
+              >
+                Avbryt
+              </button>
+              <button
+                className="modal-btn confirm"
+                onClick={handleConfirmReset}
+                disabled={resetting}
+              >
+                {resetting ? 'Återställer...' : 'Återställ'}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   )
 }