Here's what you should know about lactic acid build-up in your muscles, and how to reduce it. During high-intensity workouts, your body produces a byproduct called lactic acid, or lactate.

Too much lactic acid build up can cause the muscles to function poorly and over a long period of time feelings of fatigue, heavy legs and general tiredness can set in. When you get into an ice bath ...

So you'd see an athlete stop, they would pull up suddenly, they would start to rub the muscles and they would sometimes appear to be in some sort of pain. When you run fast lactic acid builds up ...

A common misunderstanding is that such soreness is due to lactic acid build-up in the muscles. Research, however, shows ...