Everything you’ve learned up to this point is wrong.
Lactic acid is nasty stuff. Your muscles produce it during intense exercise. It’s a metabolic byproduct that makes no contribution to exercise performance. It causes muscle fatigue and post-exercise muscle soreness. No wonder the best endurance athletes don’t produce as much lactic acid.
Actually, none of the above statements is true. Recent research has demonstrated that lactic acid is not what we once though it was, in almost every way. Read on, and learn the truth behind the lies you’ve been told.