I've found the opposite, if I run 10-15k once a week I can just barely maintain my fitness. I only start to see improvement with 3+ runs a week (at least 20 mil

I've found the opposite, if I run 10-15k once a week I can just barely maintain my fitness. I only start to see improvement with 3+ runs a week (at least 20 miles total), and one of them needs to be pushing the pace. Maybe I'm reading it wrong, but the study seems to claim that running less than the recommended amount is still good, not that running more is necessarily bad: > ...these highest runners still had trends of lower mortality than did nonrunners and only a nonsignificant trend of higher mortality than did the lower-dose runners (P≥.05). Therefore, until we have more compelling evidence on running doses and mortality, we should emphasize that “even a little is great” rather than debating whether “more is better or worse” from a public health perspective.