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Setup: Lie flat on the ground while holding a 15- to 20-pound FitFighter over your head.
Action: Lift your legs off the floor and try to touch your toes by crouching up with both hands extended. In doing so, a “V” shape should form with your body. Have a consistent pace. Don’t go too fast because your form will falter and you will risk hurting your lower back. Repeat for 10 to 20 reps.