diff --git a/app/src/main/java/com/example/medilightv2android/managers/ImuPostureClassifier.kt b/app/src/main/java/com/example/medilightv2android/managers/ImuPostureClassifier.kt
index fbfcbdd..e35b9f4 100644
--- a/app/src/main/java/com/example/medilightv2android/managers/ImuPostureClassifier.kt
+++ b/app/src/main/java/com/example/medilightv2android/managers/ImuPostureClassifier.kt
@@ -59,20 +59,22 @@ object ImuPostureClassifier {
         val accMag = sqrt(ax * ax + ay * ay + az * az)
         val gyroMag = sqrt(gx * gx + gy * gy + gz * gz)
 
+        // Pitch 는 acc gate 통과 여부와 무관하게 항상 계산 (walking detector 가 사용).
+        val pitchPre = (atan(ax / sqrt(ay * ay + az * az)) * 180.0 / Math.PI).toFloat()
+
         if (accMag < ACC_MAG_MIN || accMag > ACC_MAG_MAX) {
-            return Result(Posture.UNKNOWN, 0f, accMag, gyroMag,
+            return Result(Posture.UNKNOWN, pitchPre, accMag, gyroMag,
                 "acc mag out of range (%.2f)".format(accMag))
         }
         // Gyro gate 제거 — bias 큰 디바이스에서 영구 fail 문제 (위 주석 참조)
 
-        val pitch = (atan(ax / sqrt(ay * ay + az * az)) * 180.0 / Math.PI).toFloat()
-        val absPitch = abs(pitch)
+        val absPitch = abs(pitchPre)
         val thr = GreenZoneConstants.pitchLyingThreshold
 
         // Pitch 의미: AX 가 중력과 일치할수록 큰 값 (≈90°), AZ 가 중력과 일치하면 작은 값 (≈0°).
         // 사용자 직관: 센서 평평하게 둠 (AZ up) = LYING, 세움 (AX up) = NON_LYING (upright).
         // → 작은 pitch → LYING, 큰 pitch → NON_LYING
         val posture = if (absPitch <= thr) Posture.LYING else Posture.NON_LYING
-        return Result(posture, pitch, accMag, gyroMag, "ok")
+        return Result(posture, pitchPre, accMag, gyroMag, "ok")
     }
 }
diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
index a13c319..7e25a64 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
@@ -725,10 +725,10 @@ fun PiezoMonitoringView(appState: AppState) {
             val walkSnap = walkingDetector.update(samples, r.pitchDeg, nowMs)
             val isWalkingNow = walkSnap.isWalking
 
-            // Composite posture — WALKING 이 NON_LYING 보다 우선
+            // Composite posture — WALKING 이 UNKNOWN/NON_LYING 보다 우선 (자체 게이트 신뢰)
             val composite = when {
-                r.posture == com.example.medilightv2android.managers.Posture.UNKNOWN -> com.example.medilightv2android.managers.Posture.UNKNOWN
                 isWalkingNow -> com.example.medilightv2android.managers.Posture.WALKING
+                r.posture == com.example.medilightv2android.managers.Posture.UNKNOWN -> com.example.medilightv2android.managers.Posture.UNKNOWN
                 else -> r.posture   // LYING or NON_LYING
             }