Old thread bumped.
I assume training means training to run as fast as you can.
So a decrease in effort or volume wouldn't count.
And then what is the time frame?
One year, or more?
How about - how many DI (or D anything) compete in an open track meet the following season after graduation, running at the level they were or better?
I did for three years after graduating, but I think that is more the exception.
20% or less may be right.
I think there would be a big drop off after one year of post-collegiate running, too.
Hard to work full time and train at that level and it's hard to justify not working to keep up the training.