Multitaskers will savor BOSU Boot Camp at Crunch. Designed around BOSU balance trainers — those blue vinyl domes with flat bottoms — this class incorporates cardio, balance work, and sculpt in the form of killer squats and precarious push-ups using the Bosu, dome side down. (Multiple locations; www.crunch.com.)
It happens to all of us: You mastered the treadmill but forgot about the rest of your body! Definitions at The Sports Club/LA is a crash course in total body sculpting. With free weights, resistance bands, and body balls, you'll learn to work muscles from different angles to maximize results. (Multiple locations; www.thesportsclubla.com.)
Urban Motion at Equinox is an ass-kicking two-hour program divided into four half-hour segments with breaks in between. Capoeira, kick-boxing, and shadow-boxing drills are followed by ab work, lunges, squats, and free weights with a calming sun-salutation stretch at the end. (Multiple locations; www.equinoxnyc.com.)
Gyrokinesis class at Sal Anthony's Movement Salon is the equipment-free version of Gyrotonic work — graceful circular movements that stretch the spine, increase blood flow, and build strength. As one regular says of his favorite instructor, "It's worth it to watch Mariarosa move." (190 Third Avenue, at 17th Street; 212-420-7242.)
