Lie supine, legs tabletop or extended, arms reaching long by sides.
Lift head and shoulders, engage core, gaze toward thighs.
Pump arms vigorously, inhaling five counts, exhaling five counts.
Maintain stable torso and strong abdominals for one hundred counts.
Guia do Exercício 百式(双腿伸直) - Treino 腹肌 | MuscleWiki