10 Ways Sitting Wrecks Your Body

Want to keep your bones strong and healthy? Engage in weight-bearing exercises such as walking and strength training, and cut back on the sitting. © Bunyos/iStock/Thinkstock

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As many as half of adult Americans are affected by bone loss. Ten million live with osteoporosis, and even more -- about 43 million more -- have lost enough bone mass that they're at a high risk of developing osteoporosis, according to the National Osteoporosis Foundation [source: NOF]. To strengthen your bones and prevent osteoporosis, you need to stand up. Bones need to support your weight -- or some weight -- regularly in order to stay strong; otherwise they lose their density and become brittle and weak.

Daily walking will help you make strides against osteoporosis, as well as both weight-bearing exercises and resistance training. Exercises that put a little pressure on those bones keep bone loss at bay (and it'll also build muscles and keep you flexible, too).