Three reasons to do ... split jumps

The move: Split jumps

Three reasons to do it now:

• It's a below-the-waist toner.It strengthens the muscles in the lower body: quads, hamstrings, glutes, calves and the anterior tibialis, said espnW columnist Amy Dixon, an exercise physiologist and group fitness manager for Equinox in Santa Monica, Calif. Bonus: It also works the core.

• It will save your ACL. Women have a much higher incidence of ACL injuries than men. "One possible cause is their inability to recruit muscles in the right sequence when they land forcefully in sports," said personal trainer Tom Holland, the author of "Beat the Gym". "This will significantly help train that specific issue."

• It will help you reach new heights. This plyometric movement, which involves a rapid shortening of the muscles, . "If you need to be able to drive out of the starting gates for your 100 meter dash, improve your vertical leap to rebound the ball on the boards or serve up a big block at the net, this is a fantastic exercise for you," Dixon said.

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