Go Gadgets: Fit Ball

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Jet-Set Fitness

Fit Ball body therapy ball

When ski training makes your quads—and lower back—tighter than Britney Spears' jeans, just flip on the TV and do the Fit Ball body roll. Using your bodyweight to get down deep, roll the ball along achy muscles to release muscle tension. luggage space: 5—7 inches in diameter, 0.75 pounds info: $10; balldynamics.com