Back in the 1970s, gyms used to offer vibrating belts as a cutting-edge tool for fat loss. That was stupid. Especially since they could have just used a kettlebell, which may be one of the best fat-blasting tools of all time. Try it yourself with this sweat-drenching kettlebell workout that features the swing. It'll light up lungs, hammer your muscles, and torch calories fast -- all with just a single weight. In fact, it's so effective there's really only one way to describe it: Genius.

Don't have a kettlebell? Grab a dumbbell by the head and get swinging.

Here's how it works:

Do all eight exercises in a circuit. Perform each movement for 30 seconds, resting for 30 seconds before moving on to the next exercise. For single-arm movements, perform 30 seconds of work on your right side, and then rest for 30 seconds before switching to your left. Rest again, and the proceed to the next exercise. Once you've completed the circuit, repeat the entire sequence two more times for a grueling 24-minute workout.

If you want more killer kettlebell workouts, check out Men's Health StreamFIT today.

Click here to instantly stream over 300 follow-along workout videos to your smartphone, tablet, computer or TV.

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