Terrazzo speckling on a pale ground makes this set read as flooring rather than gym equipment, so it can stay down in a living room or a child's bedroom between workouts. Thirty-six EVA tiles of 13 by 12.5 inches interlock into whatever shape the room allows: eighteen pieces cover about 71.5 by 36.5 inches, and the full fifty-four piece layout stretches to 106.5 by 71.5 inches. A high-density core takes the impact of jumps, boxing footwork and taekwondo drills, and doubles as a guard against the dents a treadmill or barbell would leave in a hard floor. Widened end borders give the finished area a straight, clean outline. The 36-piece set weighs 6 pounds, so rebuilding the layout is a two-minute job.