By Selene Yeager on
Running blasts stress, strengthens your heart and gives you great legs - but it can have some strange side effects.
The benefits of aerobic exercises such as cycling or running are unmistakable. But a few of its odder side effects - like tasting blood during a race, maybe - could be mistaken for symptoms of problems.
Relax: strange as these physiological reactions to exercise are, they generally aren’t cause for alarm, says sports medicine doctor Jordan Metzl, author of The Athlete’s ... ...