PITTSBURGH (AP) -- Race officials weighed moving up the 7:55 a.m. start of Sunday's U.S. Olympic men's marathon trials because of warm weather, but decided against it.

 Mid-afternoon highs in the mid to high 80s are forecast, meaning it could be into the 70s by the time the marathon ends about 10 a.m. EST.

 But race director Larry Grollman decided against switching the time, saying, "It's not logistically feasible."

 Grollman and other race officials are concerned the hundreds of volunteers who man various posts throughout the course would not get word of the time change and would show up too late.

 Some runners, led by 1996 Olympian Mark Coogan, asked that the start be moved to 6:55 a.m.

 "It seems to make sense that if you start an hour earlier, then it's 60 when you start and 60 when you finish," Coogan said. "And the humidity is going to get higher as the morning goes on."

 The Pittsburgh Marathon will be run in conjunction with the men's trials, which are being held in Pittsburgh for the first time. The 1988 women's Olympic trials were held in the city.