Hamstrings, Quadriceps
Abductors, Adductors, Calves, Glutes
Stand facing box.
Step onto box with one foot (e.g., right).
Drive opposite knee (left) up explosively while pushing off box foot (right).
Jump vertically, landing back on ground on the pushing foot (right).
Immediately step onto box with other foot (left) and repeat.
Mimics skipping motion onto/off box. Alternate lead foot.