If you think jumping rope is only for 10-year-old girls, think again. For this weekend's fitness challenge, your goal is to crank out 250 jumps as fast as possible. "You'll work every muscle from head to toe, and test your quickness, conditioning, and coordination," says Todd Durkin, C.S.C.S., author of The IMPACT! Body Plan.

Ready to try it? Watch the video below to see Durkin perform the challenge. He completed 250 jumps in 2 minutes and 28 seconds. What was your time? Let us know in the comments below.

Discover how Henry Cavill sculpted the body of a superhero and try The Superman Workout.

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