Caffeine may boost post-workout calorie burn

(FILE) A cup of coffee is shown in this photo. (Orlin Wagner)

If you want a better workout try a little caffeine before you lace up your tennis shoes. It may boost your exercise routine.

A study from Spain says if you're a trained athlete , caffeine may help you burn more calories a few hours post workout.

Other research from Japan finds that drinking coffee may also improve circulation, getting the blood flowing a little more.

But don't overdo it. Experts warn if you do consume caffeine, keep it to about 400 milligrams a day, the equivalent of about a 16 oz. cup of coffee.
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