The Butterfly exercise works your abs, butt, hamstrings, and thighs.
-From Flab to Fab. Butterfly: You'll stand with your feet wide for this move, then squat down and come up on to your toes. It's kind of like a jumping jack. If you wanna make it harder, go ahead and jump as you stand up. We'll do 2 sets of 16 reps.
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