This has been a very enlightening and interesting thread. From the looks of it, the primary effect of the contrast training is on MaxV and as a result I wouldn’t think it would be nearly as beneficial for a football player or other team sport athlete. While it would increase the speed reserve, most FB players have limited to no exposure to MaxV in their training and would probably benefit more from flying 20’s or something similar. However the concept itself is intriguing and I’ve even seen some people substitute the overspeed section with bounding (I think tamfb mentioned this), perhaps for safety reasons.
I suppose you could modify the workout to focus on acceleration by simply shortening the distances and substituting overspeed downhill starts for the fly work. Thoughts?