Frank Shorter here wrote:
Always keep in mind that the really good guys who did 120 mpw are the ones who survived that mileage. The people who got injured and dropped out we are never talking about because for the most part they are unknown.
As a runner you always have to find the balance between more training and recovery and injuries. For young runners in the 20ies I would say go for it and see what happens.
This changes when you are over 30 or even over 40. I think you have to get more careful.
The ROE of high mileage goes down the older you get, I think.
"High mileage" has to be re-defined as you age.
Age 40 plus, say 80 mpw?
Age 50 plus, say 65 mpw?
Age 60 plus, say 50 mpw?
Anyone have different ideas, by experience?