The usual morons, I mean the dimmer witted sportswriters, are bashing Lebron James for not being ready for the AC to be off in San Antonio in Game 1 of the NBA finals. So why did the best athlete in the sport cramp up when lesser athletes didn't?
Mostly, I think, its a matter of physics. Lebron is a very large guy, and he plays with the intensity of a great small guard. Those huge muscles that let him finish through foul and obstruction generate a terrific amount of heat. Maybe if his coach had been strong willed enough, and far sighted enough, he would have sat the big guy more and earlier the third quarter.
Everybody had to play in the same heat, but the effects are different for different players.