Side Jackknife
Strength · No equipment · Beginner
How to do it
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