Lie prone on the box, chest just off edge, arms holding straps.
Start with arms down, palms facing in, shoulders set away from ears.
Lift arms out to a T, squeezing shoulder blades, keeping neck long.
Lower with control, maintain neutral spine, repeat for smooth controlled reps.
箱上俯卧,手拉悬挂带的飞机式 运动指南 - 下背部 锻炼 | MuscleWiki