This rubber tube with handgrips was invented by personal trainer Michol Dalcourt in 2004 for pro hockey players' off-ice workouts. ViPR takes the place of a bar for squats, lunges, and dead lifts, and is better than a machine for lumberjack chops and lat pulls. "Holding the ViPR and doing anything creates a workout," says Rast. "A lunge is great, but doing it with a 26-pound tube forces muscles in your body to work differently." [$275; viprfit.com]
DO THIS: Roll-up squat. Hold the ViPR at your chest, and – in one fluid motion – squat, roll onto your back, move the ViPR above your head and back to your chest, and roll up to a stand. Repeat 20 times.
• Lunges. Holding the ViPR in front or overhead, lunge forward with your right leg, then your left.
• Chops. Perform a chopping motion to one side, then the other.
• Farmer's lifts. Squat and touch the tube to the ground at your left side. Stand, then lift it over your head and repeat to the right.
• Dead-lift pulls. With slightly bent legs, lift the ViPR off the ground and raise it to your chin.