When we work out strenuously, our muscles compensate for lack of oxygen by producing lactate, a.k.a. lactic acid, which allows the muscles to utilize glucose for energy.
Once lactic acid is produced, it can remain in the muscles, causing pain and soreness that usually peaks between 24-72 hours after the vigorous workout. Unfortunately, anyone who has started working out again after a lapse in activity knows this feeling all too well. [Read more...]