Wind Sprints

Strength · No equipment · Beginner

How to do it

Hang from a pull-up bar using a pronated grip. Your arms and legs should be extended. This will be your starting position.
Begin by quickly raising one knee as high as you can. Do not swing your body or your legs. 3
Immediately reverse the motion, returning that leg to the starting position. Simultaneously raise the opposite knee as high as possible.
Continue alternating between legs until the set is complete.

Works

Abdominals

When to stop

Stop and rest if you feel chest pain or pressure, are more short of breath than you'd expect, feel dizzy or faint, or have sudden pain. If chest pain or faintness doesn't pass when you rest, call 911.

Photos and steps from free-exercise-db (public domain). Back to your plan