Main Muscles Affected
- Abdominal muscles
Exercise Difficulty
Difficult
Execution Jack Knife reverse with fitball:
- Take a push-up position, keep your arms straight and slightly more open than your shoulders, keep your legs straight
- Place the shins on the fitball and stabilize the body; pull the fitball towards your chest with your feet
- Stay a few seconds and return to the starting position.
- Lower the hips and bend the elbows during the push up position.
