Also, that passage made me think that he was repeating the common (probable) falsehood that lactic acid is what causes the soreness and tiredness of muscles fol

Also, that passage made me think that he was repeating the common (probable) falsehood that lactic acid is what causes the soreness and tiredness of muscles following anaerobic exercise. Recent research suggests that it is in fact a source of energy for the body, and slows down acidosis: http://ajpregu.physiology.org/cgi/content/abstract/287/3/R502 http://ajpregu.physiology.org/cgi/content/abstract/287/3/R50...