diff --git a/src/lib/garmin.ts b/src/lib/garmin.ts
index df4fa4e..2e3329b 100644
--- a/src/lib/garmin.ts
+++ b/src/lib/garmin.ts
@@ -142,6 +142,12 @@ export async function fetchBodyBattery(
       bodyBatteryValuesArray?: Array<[number, string, number, number]>;
     }>;
 
+    // Debug: log the raw response structure
+    logger.info(
+      { rawData: JSON.stringify(data).slice(0, 2000), date, yesterday },
+      "Body battery raw API response",
+    );
+
     // Find today's and yesterday's data from the response array
     const todayData = data?.find((d) => d.date === date);
     const yesterdayData = data?.find((d) => d.date === yesterday);