Picture from Crossfit Boston.
This is what I hear everytime I think of this exercise, mountain climbers. Days in my army and probably some form of PTSD from the training we had with this exercise. Another full-body conditioning exercise which I recommend.
Start from the Top position of a Push-Up, then bring one foot forward close to your palm, reverse that action then repeat with other leg. (Although in the picture provided, it's done as a stretch but when the element of reps and speed is added, feet does not have to be in line with hands in order to keep a good back position. Behind your palms will do.)
- Shoulder Stabilisation from the Top position of the Push-Up which you have to hold while moving your legs.
- Keeping your back solid and abs tight while moving your legs provides Core Stabilisation.
- Dynamic Stretching of the Hip Extensors and Flexors plus moving the legs which give it quite a workout.