Recent research coming out of New York University Medical Center suggests that the more often one engages in vigorous exercise the greater their risk of developing atrial fibrillation (AF). AF is a condition characterized by irregular, rapid heart rate, which affects people in many ways from simple fainting to heart failure and stroke."
see the whole article here.
Wonder if there is any truth in the article.Does that means no more body combat.? what about hiking? Jogging.
Are they vigorous ?
or this?
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