I do not doubt that Mike Barwis is a good Strength & Conditioning coach. How much better is he, than at other elite programs?
Michigan this year was not noticeably better conditioned than its opponents. I don’t think better conditioning was the obvious difference in any game. I don’t recall a game in which the Wolverines ground down their opponent in the fourth quarter.
In Michigan’s seven wins, excluding Bowling Green, the Wolverines were actually outscored (modestly) in the fourth quarter. (I exclude BG because the starters were no longer playing at the end of the game.) In their five losses, Michigan did outscore the opponents in the fourth quarter, but only by a total of 9 points—not a huge difference.
Michigan’s players certainly did not seem to be any less injury-prone than their opponents; if anything, they were more injury prone.
Although Barwis has clearly improved Michigan’s conditioning over the latter years of the Carr program, I do not see the evidence that he has made it a distinct advantage. All that one can say, is that it is no longer a liability.