The theory that steroids might produce long-term effects is supported by observations of more-natural phenomena. Even the effects of a normal, unenhanced training regimen can linger in the body for years. Consider a hypothetical, non-doping power lifter who trains hard for several years, reaching a maximum squat of 500 pounds. Then he suffers an injury and can?t train for one year. At the end of that year, his max has dropped to 350 pounds. Once he starts training again, that lifter will get back to his 500-pound max more quickly, and with less intense training, than would a beginner who started from a 350-pound max at the same time. Researchers aren?t completely sure why this happens, but some believe that heavy, prolonged exercise causes epigenetic changes that make it more efficient to create the proteins that build muscle. While these changes aren?t permanent?a sedentary former athlete will eventually lose the benefits of his former workout regime?the effects of intense exercise seem to last for a long time. An athlete who used performance-enhancing drug might see this change extended or intensified, if only because he was able to train harder and for longer hours during the time he was juicing.
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