I can't tell if you're asking for a source on the claim that physical activity and diet impact testosterone levels, but here:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4706091/
I can't tell if you're asking for a source on the claim that physical activity and diet impact testosterone levels, but here:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4706091/