Box jump

- Stand a comfortable distance from a stable box. - Dip and swing your arms, then jump explosively. - Land softly in a quarter-squat, whole foot on the box. - Stand tall on top; step (don’t jump) back down to protect your Achilles.

- Jumping back down instead of stepping down. - Landing stiff-legged or with heels off the box. - Box too high → landing in a deep, collapsed squat.