diff --git a/backend/app/services/garmin_connect_sync.py b/backend/app/services/garmin_connect_sync.py
index a1a9603..acfd336 100644
--- a/backend/app/services/garmin_connect_sync.py
+++ b/backend/app/services/garmin_connect_sync.py
@@ -328,11 +328,13 @@ def sync_wellness(garmin, user_id: int, since: Optional[datetime], db,
     # Fetch current VO2 max and fitness age once (slow-changing — only update today's row)
     today_str = date.today().isoformat()
     fa_data = _safe(garmin.get_fitnessage_data, today_str)
+    logger.info("fitnessage raw response: %s", fa_data)
     if fa_data:
         vo2 = (fa_data.get("vo2Max")
                or fa_data.get("vo2MaxPreciseValue")
                or fa_data.get("biometricProfile", {}).get("vo2Max"))
         fa  = fa_data.get("chronologicalAge") or fa_data.get("fitnessAge")
+        logger.info("fitnessage parsed: vo2=%s fa=%s", vo2, fa)
         if vo2 and float(vo2) > 0:
             try:
                 fa_row = {"vo2max": float(vo2)}