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Injury-Free Exercises

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You could set yourself up for knee injuries and pulled quadriceps. And the leg adduction and abduction machines work such small muscles in the legs that they're not even worth it. Lunges and squats again are the best way to get toned legs. If you feel the need for speed when you step on the treadmill, that's fine. Just be sure to slow it down once in awhile to work different muscle groups and to burn lots of fat. Varying speeds also breaks up the monotony of the workout. Crunch away to reach that six-pack goal, but don't anchor your feet under the couch or anything else. This move makes the hips work more and the abs work less, plus it can cause lower back injuries. Be conscious of all of your movements when you work out so that you can get the most bang for your gym buck.