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The 2-Minute Body-Fat Detonator


Explosive movements take a lot of energy. That’s one of the reasons why squat jumps often feel so much harder than a regular bodyweight squat.

“Exercises that require your muscles to fire quickly rely on your fast-twitch fibers,” explains Todd Durkin, C.S.C.S., author of The IMPACT! Body Plan. “But while they help you produce fast force, they also wear out quickly.”

(And that’s why you can only do a few reps of the jump squat before feeling the burn.)

Can you fight through fatigue to punch out rep after rep of these power exercises? Here’s how it works: Perform 10 groiners, 20 kettlebell swings, 30 cross-body mountain climbers, and 40 high-knee runs back-to-back without resting. That’s 1 round. Complete 2 total rounds.

Durkin flew through this challenge in just 2 minutes and 27 seconds. Let us know your score in the comments below.

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