Lactic acid is produced during exercise when the demand for oxygen in muscles exceeds the supply.
It causes pain and limits endurance. It is a common problem for athletes, and for people who work out, play sports, or do physical labor. Reduction of lactic acid during strenuous exercise enhances endurance and speeds recovery. Scientists in the Exercise Physiology Laboratory at a Medical School in the U.S.A. conducted the cardiovascular study. Six healthy, male bicyclists rode stationary bicycles at maximum speed in a 40 Kilometer time trial.