Coaches: from the pool deck, watch for a little outward spray of water from the mouth area as the swimmer turns to take their breath - this is a classic sign of late exhalation.
Manhattan, Kansas, USA: American football fans watch from an upper deck while a thunderstorm approaches Bill Snyder Family stadium during the first quarter of an NCAA college football game.
Coaches: from the pool deck, watch for a little outward spray of water from the mouth area as the swimmer turns to take their breath - this is a classic sign of late exhalation.