From an exercise physiology standpoint, the toxins mentioned are most likely lactic acid. Assuming this is the case (I don't know what else he would be referring to), you don't need to worry about. If indeed he was talking about lactic acid, he is a victim of misinformation. . . . recent studies have shown that lactic acid is quickly metabolized from the muscles within 15 minutes, and a cool-down period following exercise only slightly reduces this time period.
Massage stimulates circulation, and circulation flushes waste from muscles while carrying nutrients necessary for rebuilding.
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