Not much time to post today, so I offer you this link, to a great story in the Wall Street Journal by novelist Tom Perrotta about 80s tennis great, Mats Wilander. Contains all sorts of interesting bits, including this:
In his heyday, Wilander seemed to glide along the court without expending any energy. His secret: He doesn't sweat.... Wilander can teach for nearly four hours, in bright sun and 80-degree heat, in one cotton shirt and finish with just a trace of sweat under his arms. He drinks very little water and eats small meals. "My genetic makeup is a little bit crazy," he said.