Lacking muscle? Bored with your old routine? Looking to achieve that lean, ripped physique that all ultra-fit dudes seem to have? This medicine ball-only circuit is the remedy for all of it.

We're talking six back-to-back rounds of medicine ball pushups, medicine ball mountain-climbers, medicine ball Russian twists, and a jump squat finisher. You don't need no doctor: A few rounds of this challenging circuit will be the only muscle-growth medicine your abs and legs need.

Directions

You'll do this workout as a circuit, meaning you'll complete each exercise consecutively without rest. Once you've finished all exercises, rest for 60 seconds. Repeat the entire circuit for 4 to 6 rounds.

Depending upon your ability, you may shorten or lengthen the rest period. You may also complete more or fewer rounds.

For more medicine ball work:

Check out our favorite five-move med ball workout for power and explosiveness, our 50 ballsy core exercises (you'll see what we mean), and our 15 most important exercises for men.

For a complete archive of our daily quick-hit routines, go to mensfitness.com/todaysworkout.