Lactic acid doesn't cause pain or decreased performance: http://www.nytimes.com/2006/05/16/health/nutrition/16run.html http://www.nytimes.com/2006/05/16/health/

Lactic acid doesn't cause pain or decreased performance: http://www.nytimes.com/2006/05/16/health/nutrition/16run.html http://www.nytimes.com/2006/05/16/health/nutrition/16run.htm...