How to do it
Fully extend the punching arm on each rep to maximize range.
- 1
Sit on the edge of a padded stool with feet flat on the floor.
- 2
Engage your core and sit up straight.
- 3
Alternate punching forward with each arm while simultaneously tapping the opposite knee.
- 4
Continue alternating sides for the desired number of repetitions.
Expert tip
Keep your core engaged throughout the movement to stabilize your torso and enhance the workout for your abs.
Common mistakes
- ✕Rocking the torso side to side
- ✕Punching downward instead of forward
- ✕Dropping the free hand below chest level