Lactic acid is not responsible for sore muscles the day after exercise, contrary to popular belief. To get rid of lactic acid build-up in muscles, take more breaks or decrease your exercise intensity.

Several people claimed both lactic acid and glycolic acid worked "wonderfully" for them. One person said: "I used glycolic acid every day, and it worked wonderfully. My pits truly smelled like ...

So you been sprinting, Lily? Just a bit of cramp? So that's the lactic acid building up. When an athlete does too much or runs too vigorously, not enough oxygen can be delivered to the muscles.