By eHow Sports & Fitness Editor
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Lunges--along with squats, push-ups and sit-ups--are one of the primary groups of exercises you can do to improve your overall fitness and strength. Lunges strengthen all the muscles in the legs and buttocks and work the stabilizer muscles in the stomach and back. They're not always easy to do for the first time, but after a few sessions, you'll notice a big difference in your strength.
eHow Sports & Fitness Editor