. . " be able to travel underwater for such a period of time or not breathe?the human body, for lack of a better comparison, is an internal combustion engine. it requires 3 things to work ??? fuel (food), spark (nerves to fire muscles) and OXYGEN!!!to all those idiot coaches who ask their athletes (read: children) to perform such as task??? how about you go outside and run around the parking lot, holdi" . .