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For those of us feeling the burn on our wallets these days, the gym is one of the first things to go. “Times are tough for people, but it’s no reason to stop being fit,” says celebrity trainer David Kirsch, who helps tone up stars like Anne Hathaway, Liv Tyler and Heidi Klum. Kirsch is sharing his star-worthy workout plans and fitness tips on MSN.com, so you can skip the gym and stay in shape. The price? Gratis.

Buy the book! Out July 13th, David Kirsch’s Butt Book features his “favorite exercises and tips for shaping the perfect, perky butt!”

—Amy Barton

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