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Like fireworks for your muscles.
Work your calves, quads, and hamstrings to exhaustion.
Set your legs, back, and chest on fire with this punishing total-body routine.
Attack your glutes, hamstrings, and quads.
Keep the iron on the rack and train using just your bodyweight.
Utilize a medicine ball, a Swiss ball, and your own bodyweight.
Grab hold of some iron and work your legs, back, and abs to exhaustion.
Take the burn outside with this 20-minute resistance-band workout.