You get older, you shed testosterone, and lose muscle mass — about 1 percent per year after you hit your mid-30s. It's a fact of life, but also one that you can do something about. Just ask J.K. Simmons, who is clearly out to be the most ripped Commission Gordon of all time in 2017's Justice League. Celebrity trainer (and former marine) Aaron Williamson took a few insane…
This article originally appeared on http://www.mensjournal.com: What the Ripped 61-Year-Old J.K. Simmons Can Tell Us About Age and Muscle Loss
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