Realistic live-action video, documentary / educational style. No cinematic lighting, no dramatic effects. Static camera, side profile view. Upper body only (from mid-chest to top of head), no legs visible. Clean indoor background, neutral wall. No props, no spine model. Subject Adult Caucasian male, early 30s–40s. Short dark hair, light stubble, wearing glasses. Dark hoodie, casual but authoritative appearance. Calm, serious facial expression. Scene 1 – Kyphosis / Hunchback (Start) The man appears in a clearly hunched upper-body posture. Upper back rounded, shoulders rolled forward. Head pushed forward relative to the chest (forward head posture). A thin horizontal measurement line is attached directly to the center of his forehead, extending left across the frame. On the left side of the frame, a vertical height scale is visible. The horizontal line aligns with the lower point of the scale. Scene 2 – Posture Correction in Motion The man slowly straightens his upper body. Head moves upward and backward along a smooth arc. Upper spine gradually unrounds. The horizontal line remains locked to the forehead and moves upward continuously. A subtle curved guideline appears behind the neck and upper back, visually tracing the correction arc. less