Shape and lift your booty [1] with Equinox trainer Nicole Steen [2] without having to move off the floor. No equipment is needed for this one, but you might want a mat for your knees. Get ready to pulse, and feel the burn.

Credits: On Nicole: Flexi Lexi outfit [3] and APL (Athletic Propulsion Labs) shoes [4]; Vagabond Goods mat [5]