WHAT'S INSIDE: DIET & FITNESS

HowStuffWorks offers guidance for developing an exercise routine that will help you get in shape and stay healthy. Learn about diet and fitness and get tips from professional trainers.
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FEATURED: DIET & FITNESS
Which activities burn the most calories?

Warm-up exercises both prepare you for a workout and promote circulation by loosening up your entire body. Find out how to prevent injuries by following these steps before you begin any intense physical activity.

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