The TRX was designed by a US Marine with parachute straps and continues to be an effective yet simple apparatus for functional strength. The Lower Body Mountain Climber on the TRX is not only core strengthening, but also an explosive cardio move.
- Adjust TRX so straps are mid-calf height.
- Place feet in the straps.
- Begin in a plank position with elbows directly under the shoulder and back straight.
- Alternate pulling one knee in towards the chest, and releasing to starting position.