15.1: The text that goes with the bmi chart probably defines underweight to be 18.5 or less. The bmi was a population measure that was not intended to be applied to individuals; in real science, waist size correlates much better with cardiac risk. Junor may want to build muscle doing aerobic / resistance training but many track stars are "underweight". If he can do sports, his weight's probably ok.
Answered 9/5/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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