3D动画人类骨骼系统坐到站立康复锻炼循环，正面视角4K。

stic 3D animation of a character performing a continuous sit-to-stand exercise, commonly used in rehabilitation and physical therapy routines. The seamless loop showcases proper form and motion, making it ideal for use in medical training, elderly care, mobility improvement tutorials, physiotherapy apps, or educational health content. Designed with clean motion and clear anatomical movement, perfect for modern healthcare presentations or instructional videos.