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Re:Ask HN: What keeps you from exercising? by ASpring on Saturday August 13, 2016 @09:41PM (#12283934)
> Also gaining muscular mass at a young age can cause metabolism issues later (after 30), gaining weight easier and such.

I've always heard the opposite. Do you have a source for this?

Re:Ask HN: What keeps you from exercising? by samsonradu on Thursday August 18, 2016 @10:36AM (#12312790)
Not really, but have seen plenty of real-life examples.

Main point is you can NOT gain muscular mass at that age unless you take supplements or start eating protein foods like crazy! Both will mess up with your metabolism, do you agree? I m not saying going to the gym for exercising is bad per se, just early mass gain.