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.

@PostureUni が X（旧Twitter）に投稿した動画です（2026年7月20日 ・ その他 ・ 0:16）。XCLYP で再生・ダウンロードできます。