NEW YORK (Reuters) - When it comes to exercise, some like it hot, some like it hotter, and some like it under the air conditioner. Experts say heat can be help your workout, boosting circulation and increasing flexibility, but it's a relationship that can also turn nasty. "Your body is engineered to exercise in the heat," said Michele Olson, Ph.D., professor of exercise science at Auburn University at Montgomery, Alabama. "This is why we sweat. ... read more..