diff --git a/.gitignore b/.gitignore
index e3d6aae..2dc4911 100644
--- a/.gitignore
+++ b/.gitignore
@@ -139,4 +139,9 @@ heart_rate_data.json
 .claude_private
 PROJECT_STATE.md
 ARCHITECTURE.md
-SESSION_NOTES.md
\ No newline at end of file
+SESSION_NOTES.md
+
+# API testing files (contain sensitive tokens)
+test_api_live.py
+*_live_test.py
+*.token
diff --git a/oura_api_client/models/daily_activity.py b/oura_api_client/models/daily_activity.py
index 5d2b521..4bd731c 100644
--- a/oura_api_client/models/daily_activity.py
+++ b/oura_api_client/models/daily_activity.py
@@ -3,6 +3,13 @@
 from datetime import date, datetime
 
 
+class MetData(BaseModel):
+    """MET (Metabolic Equivalent of Task) time series data."""
+    interval: float = Field(..., description="Interval between measurements in minutes")
+    items: List[float] = Field(..., description="MET values for each interval")
+    timestamp: str = Field(..., description="Timestamp for the data")
+
+
 class ActivityContributors(BaseModel):
     meet_daily_targets: Optional[int] = Field(None, alias="meet_daily_targets")
     move_every_hour: Optional[int] = Field(None, alias="move_every_hour")
@@ -41,7 +48,7 @@ class DailyActivityModel(BaseModel):
     medium_activity_time: Optional[int] = Field(
         None, alias="medium_activity_time"
     )
-    met: Optional[str] = Field(None, alias="met")
+    met: Optional[MetData] = Field(None, alias="met")
     meters_to_target: Optional[int] = Field(None, alias="meters_to_target")
     non_wear_time: Optional[int] = Field(None, alias="non_wear_time")
     resting_time: Optional[int] = Field(None, alias="resting_time")
diff --git a/tests/test_client.py b/tests/test_client.py
index 0b3be57..c3df0ca 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -259,7 +259,11 @@ def test_get_daily_activity_document(self, mock_get):
             "low_activity_time": 1200,
             "medium_activity_met_minutes": 90,
             "medium_activity_time": 1800,
-            "met": "test_met",
+            "met": {
+                "interval": 5,
+                "items": [1.5, 2.0, 1.8, 2.2],
+                "timestamp": "2024-03-10T12:00:00+00:00"
+            },
             "meters_to_target": 1000,
             "non_wear_time": 300,
             "resting_time": 3600,