Step jacks

Muscles worked

Also works

You need

How to do it

1. Stand with your feet together and your arms at your sides.
2. Step one foot out to the side as you sweep both arms up overhead, then step back in as the arms come back down.
3. Alternate the stepping leg and keep the rhythm smooth and continuous.
4. It's the jumping jack's polite sibling - same full-body sweep, same steady heartbeat, zero impact on the knees and ankles.