diff --git a/src/App.php b/src/App.php
index c8dda75..abdef4e 100644
--- a/src/App.php
+++ b/src/App.php
@@ -338,7 +338,7 @@ final class App
         sort($dates, SORT_STRING);
 
         if ($dates === []) {
-            throw new RuntimeException('Der Import enthielt keine unterstützten Health-Daten.');
+            throw new RuntimeException('Der Import enthielt keine unterstützten Health-Daten. ' . $this->healthPayloadSummary($payload, $metrics, $workouts));
         }
 
         $totalItems = max(1, $this->countHealthImportItems($metricImport, $workoutImport));
@@ -468,25 +468,107 @@ final class App
 
     private function healthMetricsFromPayload(array $payload): array
     {
-        return array_values(array_filter(
-            is_array($payload['metrics'] ?? null) ? $payload['metrics'] : [],
-            'is_array'
-        ));
+        $metrics = [];
+        $this->collectHealthMetrics($payload, $metrics);
+
+        return $metrics;
     }
 
     private function healthWorkoutsFromPayload(array $payload): array
     {
+        if (is_array($payload['data'] ?? null)) {
+            $nested = $this->healthWorkoutsFromPayload($payload['data']);
+            if ($nested !== []) {
+                return $nested;
+            }
+        }
+
         if (is_array($payload['workouts'] ?? null)) {
             return array_values(array_filter($payload['workouts'], 'is_array'));
         }
 
+        if ($this->looksLikeHealthWorkout($payload)) {
+            return [$payload];
+        }
+
         if (array_is_list($payload) && isset($payload[0]) && is_array($payload[0])) {
-            return array_values(array_filter($payload, 'is_array'));
+            return array_values(array_filter($payload, fn (array $item): bool => $this->looksLikeHealthWorkout($item)));
         }
 
         return [];
     }
 
+    private function collectHealthMetrics(array $payload, array &$metrics): void
+    {
+        if (is_array($payload['metrics'] ?? null)) {
+            foreach ($payload['metrics'] as $metric) {
+                if (is_array($metric)) {
+                    $this->collectHealthMetrics($metric, $metrics);
+                }
+            }
+        }
+
+        if (is_array($payload['data'] ?? null)) {
+            $this->collectHealthMetrics($payload['data'], $metrics);
+        }
+
+        if (array_is_list($payload)) {
+            foreach ($payload as $item) {
+                if (is_array($item)) {
+                    $this->collectHealthMetrics($item, $metrics);
+                }
+            }
+
+            return;
+        }
+
+        $name = trim((string) ($payload['name'] ?? ($payload['metric'] ?? ($payload['metricName'] ?? ($payload['type'] ?? '')))));
+        if ($name === '') {
+            return;
+        }
+
+        $data = is_array($payload['data'] ?? null)
+            ? $payload['data']
+            : (is_array($payload['records'] ?? null) ? $payload['records'] : []);
+
+        if ($data === [] && (isset($payload['qty']) || isset($payload['value']) || isset($payload['date']) || isset($payload['startDate']))) {
+            $data = [$payload];
+        }
+
+        if ($data !== []) {
+            $metrics[] = ['name' => $name, 'data' => array_values(array_filter($data, 'is_array'))];
+        }
+    }
+
+    private function looksLikeHealthWorkout(array $payload): bool
+    {
+        return isset($payload['start'], $payload['duration'])
+            || isset($payload['startDate'], $payload['duration'])
+            || isset($payload['workoutActivityType'])
+            || isset($payload['workoutType']);
+    }
+
+    private function healthPayloadSummary(array $payload, array $metrics, array $workouts): string
+    {
+        $keys = array_slice(array_keys($payload), 0, 8);
+        $metricNames = [];
+        foreach (array_slice($metrics, 0, 5) as $metric) {
+            if (is_array($metric) && trim((string) ($metric['name'] ?? '')) !== '') {
+                $metricNames[] = trim((string) $metric['name']);
+            }
+        }
+
+        $parts = ['Erkannt: ' . count($metrics) . ' Metriken, ' . count($workouts) . ' Workouts'];
+        if ($keys !== []) {
+            $parts[] = 'Top-Level: ' . implode(', ', $keys);
+        }
+        if ($metricNames !== []) {
+            $parts[] = 'Metriken: ' . implode(', ', $metricNames);
+        }
+
+        return implode('. ', $parts) . '.';
+    }
+
     private function healthEventsFromMetrics(array $metrics): array
     {
         $steps = [];
@@ -724,7 +806,7 @@ final class App
 
     private function healthSleepHours(array $point): float
     {
-        foreach (['totalSleep', 'asleep', 'qty', 'inBed'] as $key) {
+        foreach (['totalSleep', 'asleep', 'qty', 'value', 'inBed'] as $key) {
             if (is_numeric($point[$key] ?? null)) {
                 return max(0.0, min(24.0, (float) $point[$key]));
             }