I am so happy to see this tread HC.
So.. being an older athelete it seems to me that recovery between workouts is even more important these days than it was in my 30s. Each week I try to run, at least one 6 miler, but where I am in a training schedule, CrossFit 2 times, and work in 1 or 2 yoga sessions (believe me we do a lot more than sit in lotus contemplating our navels
). Are you aware of any information that suggests when a body crosses that threshold between... "sure I can run, and workout every day", to: "nope gotta take a break" ?