Tuck butt prob could use this
5-Minute Plyometric Workout
Stand Up for Flat Abs: Challenge your core with this fast belly-tightening routine you can do on your feet | "Bow Extension" | Hold a dumbbell in both hands above your right shoulder and point your left foot out to the side. In one motion, draw your elbows down to lower the weight as you bend your left knee toward your chest. Reverse the movement to return to start. That's one rep. Do 10, then switch sides and repeat.