Hi everyone, I'm a former runner who's well past his glory days. I used to put in 50-60 miles a week when I was training, with solid track workouts thrown in. I had PR's of 10:05 2mile, and 17:20 5k road (and 2:01 800m, 4:32 1600m in high school track)
My question is, what advantages would I have in starting to train again after having reached a fairly good level of fitness when I ran my PR's years ago? Is there any science behind 'permanent benefits' of high-level training that don't go away even after a lack of training/fitness? I remember reading about mitochondrial levels never really diminishing after you've added/trained them up. Are there other similar long-term benefits that would help me if I started training again?
Just curious about this science of this particular situation.
Thanks.