g-stockstudio via Getty Images
studio1901 via Getty Images
Get ready to feel the burn.
Granger Wootz via Getty Images
But don't just do it for the belfie!
THE GOAL: Toning your butt THE EXPERT: Lee Boyce, fitness writer and strength coach based in Toronto THE INFO: Chances are you're probably sitting on your behind for most of the day. Our butts ofte...