Reverse Plank with Leg Kicks is a core-crunching variation of the standard Reverse Plank. Assume the normal Reverse Plank position, then alternate kicking out your left and right legs while preventing your midsection from sagging. Perform 5 reps with each leg.
25 Plank Variations for a Shredded, Stable Core

These 25 plank variations will add some variety to your workouts while you shred your core.
Reverse Plank with Leg Kicks

Reverse Plank with Leg Kicks is a core-crunching variation of the standard Reverse Plank. Assume the normal Reverse Plank position, then alternate kicking out your left and right legs while preventing your midsection from sagging. Perform 5 reps with each leg.