Go for it: There's a concern that lifting very heavy weights while the epiphyses are immature may cause bleeds there that will stunt growth. Boys have been doing chin-ups for years to their considerable benefit and in 40 years in medicine, I've never heard of a mishap beyond falling off. Stop worrying, follow common sense, and I'm glad Junior is exercising. More boys should follow his example.
Answered 9/20/2017
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A doctor has provided 1 answer
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