Jumping ts

Muscles worked

You need

How to do it

1. Stand with your feet together and your arms by your sides.
2. Jump your feet out wide while raising both arms out to the sides to shoulder height - forming a T at the top - then jump your feet back together as the arms lower.
3. It's a jumping jack with a shorter, stricter arm path: the arms stop dead level with your shoulders, which keeps constant tension on the shoulders instead of letting the swing carry them.