diff --git a/backend/data_layer/recovery_chart_payloads.py b/backend/data_layer/recovery_chart_payloads.py
index 0052024..149ad26 100644
--- a/backend/data_layer/recovery_chart_payloads.py
+++ b/backend/data_layer/recovery_chart_payloads.py
@@ -377,8 +377,8 @@ def build_vital_signs_matrix_chart_payload(profile_id: str, days: int) -> Dict[s
         cur.execute(
             """SELECT systolic, diastolic
                FROM blood_pressure_log
-               WHERE profile_id=%s AND date >= %s
-               ORDER BY date DESC, time DESC
+               WHERE profile_id=%s AND measured_at::date >= %s::date
+               ORDER BY measured_at DESC
                LIMIT 1""",
             (profile_id, cutoff),
         )