Walking dumbbell lunges work all the muscles in your lower body. However, holding the weight above your body -- like you do in this grueling version of the move -- will blast every muscle from head to toe. "The dumbbell overhead walking lunge challenges the muscles in your arms, shoulders, upper back, and core to stabilize as the load tries to shift with each repetition," says Tony Gentilcore, C.S.C.S., strength coach at Cressey Perfomance in Hudson, Massachussetts, and creator of ABS 360. "You don't get that added bonus when you hold the weights by your sides." (In addition, beat your workout plateaus with this 5-move The Total-Body Muscle Assault.)

Ready to try this total-body muscle sculptor? Watch the video below to learn how to do the dumbbell overhead walking lunge with perfect form.

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(Turn up your muscle gains outside the gym. These 18 Ways to Build Muscle All Day will help you shed fat, sculpt muscle, and accelerate recovery.)