The scapular radio calisthenics that the athlete was doing during warm-up exercises. This has made my shoulders start spinning around like an engine's fired up—it's amazing... As you repeat it more times, you can hear the joints and muscles gradually loosening up.

A video posted by @PostureUni on X (formerly Twitter) (July 20, 2026 ・ その他 ・ 0:16). Watch and download it on XCLYP.