EzineArticles.com: Muscle determines how quickly the body’s engine is working and how many calories the body burns throughout the day. Unfortunately if you do not use your muscles, they will shrink. Since we are less active as we get older, our muscles will become smaller.

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Physical Activity Benefits

EzineArticles.com: The way the body loses weight fast is by converting the excess calories the body has stored up as fat into expendable energy.

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How to Lose Weight With Ease