The Curl 'n' Squat exercise works your biceps, abs, butt, and legs using a resistance band.
-The Couch Workout. Curl 'n' Squat: Stand with your feet hip width apart on the center of the band and lower into a squat. To really target your butt, remember to push to the heels, not your toes. And curl hands towards shoulders with palms facing up. Do 3 sets of 15 reps.