Your life span is written in your DNA and we’re learning to read the code

That seems consistent with studies suggesting exercise can reduce DNA methylation and that an increase in cardiorespiratory fitness is associated with a reduction in long-term mortality risks.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3501844/

https://jamanetwork.com/journals/jamanetworkopen/fullarticle...