It's not a known fact, AFAIK.
Duxmaster, if you've researched this point, please put your findings in this thread
(381.1), for everyone to enjoy (If you wish to share of course).
CocoLoloMomo,
Even if Duxmaster is right, the main question would be what is the training penalty for playing less than 48 minutes. The penalty might put your two players with less than 2/3 training. Again, I don't know of any research in this matter, if someone else does, please let us know.
yaniv