https://www.theguardian.com/lifeandstyle/shortcuts/2019/apr/22/why-are-middle-aged-marathon-runners-faster-than-twentysomethings https://www.theguardian.com/lif

https://www.theguardian.com/lifeandstyle/shortcuts/2019/apr/22/why-are-middle-aged-marathon-runners-faster-than-twentysomethings https://www.theguardian.com/lifeandstyle/shortcuts/2019/apr/... That's Strava data and also tracks with my personal experience, no idea where that site get's its data from. Here's some particular data from Boston, NYC and Chicago also bearing that out. https://www.runtri.com/2012/01/marathon-finish-times-by-age-boston-new.html https://www.runtri.com/2012/01/marathon-finish-times-by-age-...