And the January 5, 1995 issue of the journal Physiology and Behavior reports that exercise decreases tension and boosts self-esteem.

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Working from home during this time of the season has its cozy hibernation-esque elements that make it especially enticing, but this kind of immobile behavior makes it easy to slack off when it comes to exercise.

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Physical activity is a learned behavior, says one of the competition's judges, Avery Faigenbaum, a professor of health and exercise science at The College of New Jersey.

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