wore one hiking last year as she prepared to climb Kilimanjaro. "The added resistance strengthens the legs, glutes, and back and trains the stabilizing muscles of the core," says Biel's trainer, Ramona Braganza
. "Plus, it's a great calorie burner." Look for one that has a clam-shape design and fits snugly with no restrictions on your range of motion. (prices vary, jumpusa.com
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We've rounded up the best new outdoor gear to make your active life easier.
The Best New Outdoor Gear