Jacks
Muscles Used
- Quads
- Glutes
- Core
- Deltoids
Advice On Technique
- Start by standing tall with your arms by your side with your legs and feet together
- Power up from the legs with your arms reaching high above your head and your legs kicking out
- Bring your arms and legs back to the starting position on return
- Keep the chest open to avoid the shoulders arching
- keep the knees soft on landing