You should start in a high plank position (push up position), with your hands under your shoulders, toes on the ground, bottom down and your body rigid. Then, bring one knee in to meet the opposite elbow and then the other knee to meet the other elbow.
- Oblique Crunches
The most important thing to oblique crunches is to keep going until it burns!
Lie down on your side so that one leg is on top of the other, and after that bend your legs slightly and prop yourself up on one elbow. Then, crunch upward, and bring your knee to meet your elbow. Make sure to tense your oblique muscle all the time. Then swap sides.
- Plank Jacks
By keeping your core super tight during this exercise, you can target all of the core muscles.