Sometimes, the effect isn't just psychological or confidence boosting.
Sometimes, fresh legs make the difference.
North Carolina defeated Duke 3-1 (30-28, 14-30, 30-26, 30-16) on Saturday at Cameron Indoor Stadium by wearing down the Blue Devils.
On Friday against Wake Forest, UNC (11-3, 4-0 in the ACC) dropped the third game but defeated the Demon Deacons (6-5, 1-2) 3-1 by using 11 players at Reynolds Gym.
"(Wake) was more of a tactical match," UNC coach Joe Sagula said Saturday. "(Against Duke), I knew we would be fatigued. This was a physical and emotional contest."
Sagula prepared for the grueling nature of the Duke match by rotating ten players into the first game. The Blue Devils (11-1, 3-1), coming off a win against N.C. State the night before, made one substitution in the 30-28 Tar Heel win.
After that exhaustive game, UNC middle hitter Holly Strauss needed a breather. Better put, she needed a trash can into which she could throw up.
Into Strauss's place came sophomore Aletha Green, whose role was simple.
"My job is to block," said Green, who led the team with four blocks. "When Coach puts me in, that's what I'm supposed to do."