|How to do:
1. Hang on a chin bar using an overhand grip with arms
straight at shoulder width.
2. Bend your legs about 15 degrees and keep them bent and
3. Use your abdominal muscles to raise your feet upward in an
4. Hold this contracted position for a slow count of 1-2 seconds
5. Return slowly to starting position
6. Repeat repetitions until fatigued.
7. To increase intensity you may also raise your feet higher