Targets: Abs, butt, and hamstrings
- Start on ground on all fours, holding one end of a resistance tube in left hand.
- Loop handle at other end of tube around right foot (as if handle were a stirrup) so that tube runs between knees from right foot to left hand.
- Keeping abs tight and upper body still, lift right knee off ground and extend right leg directly behind you so that it's parallel to ground. (If there's not enough resistance as you press, take in some slack of tube with left hand.) Return to start.
- Do 25 reps. Switch sides and repeat.