diff --git a/app/Http/Controllers/StravaController.php b/app/Http/Controllers/StravaController.php
index 40df113..9dead08 100644
--- a/app/Http/Controllers/StravaController.php
+++ b/app/Http/Controllers/StravaController.php
@@ -5,6 +5,7 @@ namespace App\Http\Controllers;
 use App\Enums\WorkoutSource;
 use App\Http\Requests\StravaCallbackRequest;
 use App\Http\Requests\StravaSyncRequest;
+use App\Models\StravaConnection;
 use App\Models\WorkoutSessions;
 use App\Services\StravaClient;
 use Illuminate\Http\JsonResponse;
@@ -111,11 +112,13 @@ class StravaController extends Controller
             ], 422);
         }
 
-        $activities = $strava->activities(
+        $activities = collect($strava->activities(
             $connection,
             $request->integer('page', 1),
             $request->integer('per_page', 30),
-        );
+        ))
+            ->map(fn (array $activity): array => $this->activityForStorage($strava, $connection, $activity))
+            ->all();
 
         $importedCount = collect($activities)
             ->map(fn (array $activity): WorkoutSessions => $this->storeActivity($request, $activity))
@@ -144,6 +147,15 @@ class StravaController extends Controller
         ]);
     }
 
+    private function activityForStorage(StravaClient $strava, StravaConnection $connection, array $activity): array
+    {
+        if (array_key_exists('calories', $activity) || empty($activity['id'])) {
+            return $activity;
+        }
+
+        return array_replace($activity, $strava->activity($connection, $activity['id']));
+    }
+
     private function canReadActivities(array $scopes): bool
     {
         return in_array('activity:read', $scopes, true)
diff --git a/app/Services/StravaClient.php b/app/Services/StravaClient.php
index 8d52e46..57042b0 100644
--- a/app/Services/StravaClient.php
+++ b/app/Services/StravaClient.php
@@ -79,6 +79,20 @@ class StravaClient
             ->json();
     }
 
+    public function activity(StravaConnection $connection, int|string $activityId): array
+    {
+        return Http::baseUrl('https://www.strava.com/api/v3')
+            ->withToken($this->accessToken($connection))
+            ->timeout(10)
+            ->connectTimeout(3)
+            ->retry([100, 500, 1000])
+            ->get("/activities/{$activityId}", [
+                'include_all_efforts' => false,
+            ])
+            ->throw()
+            ->json();
+    }
+
     private function accessToken(StravaConnection $connection): string
     {
         if (! $connection->expires_at || $connection->expires_at->lte(now()->addMinutes(5))) {
diff --git a/tests/Feature/StravaConnectionTest.php b/tests/Feature/StravaConnectionTest.php
index bb9b927..63b7945 100644
--- a/tests/Feature/StravaConnectionTest.php
+++ b/tests/Feature/StravaConnectionTest.php
@@ -144,6 +144,57 @@ it('syncs strava activities into workouts', function () {
     ]);
 });
 
+it('syncs strava calories from detailed activities when summaries omit them', function () {
+    Http::preventStrayRequests();
+    Http::fake([
+        'https://www.strava.com/api/v3/athlete/activities*' => Http::response([
+            [
+                'id' => 1122334455,
+                'name' => 'Evening ride',
+                'sport_type' => 'Ride',
+                'moving_time' => 2410,
+                'distance' => 20500.2,
+                'start_date' => '2026-05-19T17:45:00Z',
+            ],
+        ]),
+        'https://www.strava.com/api/v3/activities/1122334455*' => Http::response([
+            'id' => 1122334455,
+            'name' => 'Evening ride',
+            'sport_type' => 'Ride',
+            'moving_time' => 2410,
+            'calories' => 618.4,
+            'distance' => 20500.2,
+            'start_date' => '2026-05-19T17:45:00Z',
+        ]),
+    ]);
+
+    $user = User::factory()->create();
+    StravaConnection::create([
+        'user_id' => $user->id,
+        'athlete_id' => 123456,
+        'access_token' => 'access-token',
+        'refresh_token' => 'refresh-token',
+        'expires_at' => now()->addHour(),
+        'scopes' => ['read', 'activity:read'],
+        'athlete' => ['id' => 123456],
+    ]);
+
+    Sanctum::actingAs($user);
+
+    $this
+        ->postJson('/api/strava/sync')
+        ->assertOk()
+        ->assertJsonPath('data.importedCount', 1)
+        ->assertJsonPath('data.fetchedCount', 1);
+
+    $this->assertDatabaseHas('workout_sessions', [
+        'user_id' => $user->id,
+        'source' => WorkoutSource::STRAVA->value,
+        'external_id' => '1122334455',
+        'calories_burned' => 618,
+    ]);
+});
+
 it('requires an activity read scope before syncing strava activities', function () {
     $user = User::factory()->create();
     StravaConnection::create([