Third-person singular simple present indicative form of overtrain.(verb)
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Use "overtrains" in a sentence
"If you truly are interested in getting more fit, a varied program of weight-training, moderate interval-type cardio, and activities you enjoy is better than marathon training, which does not provide any variety, overtrains one part of the body only, and can be highly injury-producing."
"Cushing believes that when he overtrains and then stops, it elevates the HCG in his body enough to produce a positive test."