diff --git a/app/Http/Controllers/ExerciseController.php b/app/Http/Controllers/ExerciseController.php
index dd77ff6..549ac87 100644
--- a/app/Http/Controllers/ExerciseController.php
+++ b/app/Http/Controllers/ExerciseController.php
@@ -6,6 +6,7 @@ use App\Models\BodyPart;
 use App\Models\Equipment;
 use App\Models\Exercise;
 use App\Models\Muscle;
+use App\Models\WorkoutSessionItem;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
 
@@ -104,9 +105,23 @@ class ExerciseController extends Controller
 
         $similarExercises = $similarQuery->get();
 
+        $personalBest = null;
+        if (Auth::check()) {
+            $personalBest = WorkoutSessionItem::query()
+                ->with('session')
+                ->whereHas('workoutExercise', fn ($q) => $q->where('exercise_id', $exercise->id))
+                ->whereHas('session', fn ($q) => $q->where('user_id', Auth::id()))
+                ->where('done', true)
+                ->whereNotNull('actual_weight')
+                ->orderByDesc('actual_weight')
+                ->orderByDesc('actual_reps')
+                ->first();
+        }
+
         return view('exercises.show', [
             'exercise' => $exercise,
             'similarExercises' => $similarExercises,
+            'personalBest' => $personalBest,
         ]);
     }
 }
diff --git a/app/Http/Controllers/WorkoutSessionController.php b/app/Http/Controllers/WorkoutSessionController.php
index deb26b3..bbfef5c 100644
--- a/app/Http/Controllers/WorkoutSessionController.php
+++ b/app/Http/Controllers/WorkoutSessionController.php
@@ -58,6 +58,11 @@ class WorkoutSessionController extends Controller
             abort(404);
         }
 
+        $data = $request->validate([
+            'actual_weight' => ['nullable', 'numeric', 'min:0', 'max:9999.99'],
+            'actual_reps' => ['nullable', 'integer', 'min:0', 'max:1000'],
+        ]);
+
         $si = WorkoutSessionItem::firstOrCreate([
             'session_id' => $session->id,
             'workout_exercise_id' => $item->id,
@@ -66,6 +71,14 @@ class WorkoutSessionController extends Controller
         ]);
 
         $si->done = !$si->done;
+        if ($si->done) {
+            if (array_key_exists('actual_weight', $data) && $data['actual_weight'] !== null) {
+                $si->actual_weight = $data['actual_weight'];
+            }
+            if (array_key_exists('actual_reps', $data) && $data['actual_reps'] !== null) {
+                $si->actual_reps = $data['actual_reps'];
+            }
+        }
         $si->save();
 
         return back();
diff --git a/app/Models/WorkoutSessionItem.php b/app/Models/WorkoutSessionItem.php
index 4382b6a..9bf6f7d 100644
--- a/app/Models/WorkoutSessionItem.php
+++ b/app/Models/WorkoutSessionItem.php
@@ -16,12 +16,16 @@ class WorkoutSessionItem extends Model
         'done',
         'exercise_ms',
         'rest_ms',
+        'actual_weight',
+        'actual_reps',
     ];
 
     protected $casts = [
         'done' => 'boolean',
         'exercise_ms' => 'integer',
         'rest_ms' => 'integer',
+        'actual_weight' => 'decimal:2',
+        'actual_reps' => 'integer',
     ];
 
     public function session(): BelongsTo
diff --git a/database/factories/WorkoutSessionItemFactory.php b/database/factories/WorkoutSessionItemFactory.php
new file mode 100644
index 0000000..b1e0ea7
--- /dev/null
+++ b/database/factories/WorkoutSessionItemFactory.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\WorkoutExercise;
+use App\Models\WorkoutSession;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\WorkoutSessionItem>
+ */
+class WorkoutSessionItemFactory extends Factory
+{
+    public function definition(): array
+    {
+        return [
+            'session_id' => WorkoutSession::factory(),
+            'workout_exercise_id' => WorkoutExercise::factory(),
+            'done' => false,
+            'actual_weight' => null,
+            'actual_reps' => null,
+        ];
+    }
+}
diff --git a/database/migrations/2026_08_10_091029_add_actual_performance_to_workout_session_items_table.php b/database/migrations/2026_08_10_091029_add_actual_performance_to_workout_session_items_table.php
new file mode 100644
index 0000000..7da23c2
--- /dev/null
+++ b/database/migrations/2026_08_10_091029_add_actual_performance_to_workout_session_items_table.php
@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('workout_session_items', function (Blueprint $table) {
+            $table->decimal('actual_weight', 6, 2)->nullable()->after('done');
+            $table->unsignedSmallInteger('actual_reps')->nullable()->after('actual_weight');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('workout_session_items', function (Blueprint $table) {
+            $table->dropColumn(['actual_weight', 'actual_reps']);
+        });
+    }
+};
diff --git a/lang/en/app.php b/lang/en/app.php
index cfaed6f..279c431 100644
--- a/lang/en/app.php
+++ b/lang/en/app.php
@@ -192,6 +192,8 @@ return [
                 'rename_reset' => 'Reset',
                 'renamed_success' => 'Your custom name has been saved.',
                 'rename_cleared' => 'Custom name cleared.',
+        'personal_best' => 'Your Personal Best',
+        'no_personal_best' => 'No completed sets logged yet. Track weight and reps when you check off a set in a session.',
     ],
 
     'sessions' => [
@@ -211,7 +213,9 @@ return [
         'rest_timer' => 'Rest timer',
         'start_rest' => 'Start',
         'pause_rest' => 'Pause',
-        'reset_rest' => 'Reset'
+        'reset_rest' => 'Reset',
+        'weight_lifted' => 'Weight',
+        'reps_done' => 'Reps',
     ],
 
     'dashboard' => [
diff --git a/lang/ro/app.php b/lang/ro/app.php
index c119d78..e3a834b 100644
--- a/lang/ro/app.php
+++ b/lang/ro/app.php
@@ -192,6 +192,8 @@ return [
                         'rename_reset' => 'Resetează',
                         'renamed_success' => 'Numele personalizat a fost salvat.',
                         'rename_cleared' => 'Numele personalizat a fost eliminat.',
+        'personal_best' => 'Recordul tău personal',
+        'no_personal_best' => 'Niciun set finalizat înregistrat încă. Înregistrează greutatea și repetările când bifezi un set într-o sesiune.',
     ],
 
     'sessions' => [
@@ -211,7 +213,9 @@ return [
         'rest_timer' => 'Cronometru pauză',
         'start_rest' => 'Start',
         'pause_rest' => 'Pauză',
-        'reset_rest' => 'Reset'
+        'reset_rest' => 'Reset',
+        'weight_lifted' => 'Greutate',
+        'reps_done' => 'Repetări',
     ],
 
     'dashboard' => [
diff --git a/resources/views/exercises/show.blade.php b/resources/views/exercises/show.blade.php
index 41dcac3..5120815 100644
--- a/resources/views/exercises/show.blade.php
+++ b/resources/views/exercises/show.blade.php
@@ -79,6 +79,22 @@
                 </div>
             </div>
             <div class="lg:col-span-4">
+                @auth
+                    <div class="rounded-2xl p-5 ring-1 ring-gray-200 dark:ring-gray-700 bg-white dark:bg-gray-800 mb-6">
+                        <h3 class="text-sm font-semibold text-gray-900 dark:text-white">{{ __('app.exercises.personal_best') }}</h3>
+                        @if($personalBest)
+                            <div class="mt-2 flex items-baseline gap-2">
+                                <span class="text-2xl font-extrabold text-gray-900 dark:text-white">{{ rtrim(rtrim(number_format($personalBest->actual_weight, 1), '0'), '.') }} kg</span>
+                                @if($personalBest->actual_reps)
+                                    <span class="text-sm text-gray-600 dark:text-gray-300">&times; {{ $personalBest->actual_reps }} {{ __('app.sessions.reps') }}</span>
+                                @endif
+                            </div>
+                            <p class="mt-1 text-xs text-gray-500">{{ optional($personalBest->session)->completed_at?->format('M j, Y') ?? $personalBest->updated_at->format('M j, Y') }}</p>
+                        @else
+                            <p class="mt-2 text-sm text-gray-600 dark:text-gray-300">{{ __('app.exercises.no_personal_best') }}</p>
+                        @endif
+                    </div>
+                @endauth
                 <div class="rounded-2xl p-5 ring-1 ring-gray-200 dark:ring-gray-700 bg-white dark:bg-gray-800">
                     <h3 class="text-sm font-semibold text-gray-900 dark:text-white">Exercise Info</h3>
                     <dl class="mt-3 space-y-2 text-sm text-gray-700 dark:text-gray-300">
diff --git a/resources/views/workouts/session.blade.php b/resources/views/workouts/session.blade.php
index b1f3d84..8885f6d 100644
--- a/resources/views/workouts/session.blade.php
+++ b/resources/views/workouts/session.blade.php
@@ -29,6 +29,8 @@
                                     <form method="POST" action="{{ route('sessions.items.toggle', [$session, $item]) }}" class="session-toggle-form" data-item-id="{{ $item->id }}" data-initial-done="{{ $isDone ? '1' : '0' }}">
                                         @csrf
                                         @method('PATCH')
+                                        <input type="hidden" name="actual_weight" class="actual-weight-input" value="{{ old('actual_weight', $si->actual_weight ?? $item->weight) }}">
+                                        <input type="hidden" name="actual_reps" class="actual-reps-input" value="{{ old('actual_reps', $si->actual_reps ?? $item->reps) }}">
                                         <button type="submit" class="h-6 w-6 rounded-md border flex items-center justify-center transition-colors duration-150"
                                                 aria-pressed="{{ $isDone ? 'true' : 'false' }}"
                                                 title="{{ $isDone ? __('app.sessions.mark_complete') : __('app.sessions.progress') }}">
@@ -40,6 +42,17 @@
                                     </form>
                                     <div>
                                         <div class="exercise-title text-base font-semibold {{ $isDone ? 'line-through text-gray-500 dark:text-gray-400' : 'text-gray-900 dark:text-white' }}">{{ $item->exercise->display_name }}</div>
+                                        <div class="mt-2 flex items-center gap-3 text-sm">
+                                            <label class="flex items-center gap-1.5 text-gray-600 dark:text-gray-300">
+                                                {{ __('app.sessions.weight_lifted') }}
+                                                <input type="number" step="0.5" min="0" class="actual-weight-field w-20 rounded-lg border-gray-300 dark:border-gray-700 bg-white/80 dark:bg-gray-900 text-gray-900 dark:text-gray-100 px-2 py-1" value="{{ $si->actual_weight ?? $item->weight }}">
+                                                kg
+                                            </label>
+                                            <label class="flex items-center gap-1.5 text-gray-600 dark:text-gray-300">
+                                                {{ __('app.sessions.reps_done') }}
+                                                <input type="number" min="0" class="actual-reps-field w-16 rounded-lg border-gray-300 dark:border-gray-700 bg-white/80 dark:bg-gray-900 text-gray-900 dark:text-gray-100 px-2 py-1" value="{{ $si->actual_reps ?? $item->reps }}">
+                                            </label>
+                                        </div>
                                         <div class="mt-1 text-sm text-gray-600 dark:text-gray-300">
                                             @if($item->sets) {{ $item->sets }} {{ __('app.sessions.sets') }} @endif
                                             @if($item->reps) · {{ $item->reps }} {{ __('app.sessions.reps') }} @endif
@@ -130,6 +143,17 @@
         const next = !wasDone;
         updateBtnState(btn, next);
 
+        // Sync the visible weight/reps fields (outside the form) into the hidden form inputs
+        const row = btn.closest('li');
+        if (row) {
+            const weightField = row.querySelector('.actual-weight-field');
+            const repsField = row.querySelector('.actual-reps-field');
+            const weightInput = form.querySelector('.actual-weight-input');
+            const repsInput = form.querySelector('.actual-reps-input');
+            if (weightField && weightInput) weightInput.value = weightField.value;
+            if (repsField && repsInput) repsInput.value = repsField.value;
+        }
+
         fetch(form.action, {
             method: 'POST',
             headers: {
diff --git a/tests/Feature/ExerciseTest.php b/tests/Feature/ExerciseTest.php
index 55c38c8..f9a0ef8 100644
--- a/tests/Feature/ExerciseTest.php
+++ b/tests/Feature/ExerciseTest.php
@@ -4,6 +4,11 @@ namespace Tests\Feature;
 
 use App\Models\BodyPart;
 use App\Models\Exercise;
+use App\Models\User;
+use App\Models\Workout;
+use App\Models\WorkoutExercise;
+use App\Models\WorkoutSession;
+use App\Models\WorkoutSessionItem;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Tests\TestCase;
 
@@ -73,4 +78,70 @@ class ExerciseTest extends TestCase
 
         $response->assertNotFound();
     }
+
+    public function test_show_displays_personal_best_from_completed_session_items(): void
+    {
+        $user = User::factory()->create();
+        $exercise = Exercise::factory()->create();
+        $workout = Workout::factory()->create(['user_id' => $user->id]);
+        $workoutExercise = WorkoutExercise::factory()->create(['workout_id' => $workout->id, 'exercise_id' => $exercise->id]);
+        $session = WorkoutSession::factory()->create(['user_id' => $user->id, 'workout_id' => $workout->id]);
+
+        WorkoutSessionItem::factory()->create([
+            'session_id' => $session->id,
+            'workout_exercise_id' => $workoutExercise->id,
+            'done' => true,
+            'actual_weight' => 60,
+            'actual_reps' => 5,
+        ]);
+
+        $response = $this->actingAs($user)->get(route('exercises.show', $exercise->slug));
+
+        $response->assertOk();
+        $response->assertSee('60 kg', false);
+    }
+
+    public function test_show_picks_the_heaviest_completed_set_across_sessions_as_personal_best(): void
+    {
+        $user = User::factory()->create();
+        $exercise = Exercise::factory()->create();
+        $workout = Workout::factory()->create(['user_id' => $user->id]);
+        $workoutExercise = WorkoutExercise::factory()->create(['workout_id' => $workout->id, 'exercise_id' => $exercise->id]);
+        $earlierSession = WorkoutSession::factory()->create(['user_id' => $user->id, 'workout_id' => $workout->id]);
+        $laterSession = WorkoutSession::factory()->create(['user_id' => $user->id, 'workout_id' => $workout->id]);
+
+        WorkoutSessionItem::factory()->create([
+            'session_id' => $earlierSession->id, 'workout_exercise_id' => $workoutExercise->id,
+            'done' => true, 'actual_weight' => 60, 'actual_reps' => 5,
+        ]);
+        WorkoutSessionItem::factory()->create([
+            'session_id' => $laterSession->id, 'workout_exercise_id' => $workoutExercise->id,
+            'done' => true, 'actual_weight' => 70, 'actual_reps' => 3,
+        ]);
+
+        $response = $this->actingAs($user)->get(route('exercises.show', $exercise->slug));
+
+        $response->assertOk();
+        $response->assertSee('70 kg', false);
+        $response->assertDontSee('60 kg', false);
+    }
+
+    public function test_show_ignores_incomplete_sets_for_personal_best(): void
+    {
+        $user = User::factory()->create();
+        $exercise = Exercise::factory()->create();
+        $workout = Workout::factory()->create(['user_id' => $user->id]);
+        $workoutExercise = WorkoutExercise::factory()->create(['workout_id' => $workout->id, 'exercise_id' => $exercise->id]);
+        $session = WorkoutSession::factory()->create(['user_id' => $user->id, 'workout_id' => $workout->id]);
+
+        WorkoutSessionItem::factory()->create([
+            'session_id' => $session->id, 'workout_exercise_id' => $workoutExercise->id,
+            'done' => false, 'actual_weight' => 90, 'actual_reps' => 5,
+        ]);
+
+        $response = $this->actingAs($user)->get(route('exercises.show', $exercise->slug));
+
+        $response->assertOk();
+        $response->assertDontSee('90 kg', false);
+    }
 }
diff --git a/tests/Feature/WorkoutSessionTest.php b/tests/Feature/WorkoutSessionTest.php
index 370246f..bca6a1b 100644
--- a/tests/Feature/WorkoutSessionTest.php
+++ b/tests/Feature/WorkoutSessionTest.php
@@ -93,6 +93,48 @@ class WorkoutSessionTest extends TestCase
         ]);
     }
 
+    public function test_toggling_done_records_actual_weight_and_reps(): void
+    {
+        $user = User::factory()->create();
+        $workout = Workout::factory()->create(['user_id' => $user->id]);
+        $item = WorkoutExercise::factory()->create(['workout_id' => $workout->id]);
+        $session = WorkoutSession::factory()->create(['user_id' => $user->id, 'workout_id' => $workout->id]);
+
+        $this->actingAs($user)->patch(route('sessions.items.toggle', [$session, $item]), [
+            'actual_weight' => 62.5,
+            'actual_reps' => 8,
+        ]);
+
+        $this->assertDatabaseHas('workout_session_items', [
+            'session_id' => $session->id,
+            'workout_exercise_id' => $item->id,
+            'done' => true,
+            'actual_weight' => 62.5,
+            'actual_reps' => 8,
+        ]);
+    }
+
+    public function test_untoggling_does_not_send_actual_weight(): void
+    {
+        $user = User::factory()->create();
+        $workout = Workout::factory()->create(['user_id' => $user->id]);
+        $item = WorkoutExercise::factory()->create(['workout_id' => $workout->id]);
+        $session = WorkoutSession::factory()->create(['user_id' => $user->id, 'workout_id' => $workout->id]);
+
+        $this->actingAs($user)->patch(route('sessions.items.toggle', [$session, $item]), [
+            'actual_weight' => 62.5,
+            'actual_reps' => 8,
+        ]);
+        $this->actingAs($user)->patch(route('sessions.items.toggle', [$session, $item]));
+
+        $this->assertDatabaseHas('workout_session_items', [
+            'session_id' => $session->id,
+            'workout_exercise_id' => $item->id,
+            'done' => false,
+            'actual_weight' => 62.5,
+        ]);
+    }
+
     public function test_owner_can_complete_a_session(): void
     {
         $user = User::factory()->create();