This issue has been mentioned on a separate thread regarding use of resisted runs in the competition phase. I was under the impression MVP kept them in year round and if so, what was the reasoning…
The potentiation effect is interesting, and if the athlete leaves the session having completed a particularly good final run, then I think that can be hugely positive in terms of psychology also. Yes, I understand how it would be difficult to isolate a variable that saw longer term improvements and agree that enjoyable sessions are good!!!