With a vertical leap reportedly measuring more than 40 inches, LeBron James reigns king of the air. Sure, great genes help. But any man can increase his hops with a little work. The secret is adding plyometric training -- explosive power movements -- to your workout, says Todd Durkin, C.S.C.S., author of The IMPACT! Body Plan. That's why Durkin created this high-powered fitness challenge.
The test: How fast can you complete 24 jumps on a 24-inch box or bench?
Here's how it works: Stand facing a box or bench that's 24 inches high. Jump onto it with both feet, landing softly with your knees slightly bent. Step down and repeat. Do 24 total.
Is a 24-inch box or bench too high? Use one 12 inches high to start, and work your way up to taller boxes each time you try the drill.
Want to give it a shot? Watch the video above to see Durkin perform the challenge. He completed 24 jumps in 58 seconds. What was your time? Tell us in the comments below. (Or, try one of these other exercises in the Men's Health Train For Life Challenge Series.)