So far, / he sounds / like a normal athlete.
What he does / next, however, / is extraordinary.
He raises / his body temperature / by almost / 3˚F / (1.4˚C) / to 101˚F / (38˚C).
He does it all / by mental control.
Then / Pugh dives / into the water.
Most people / would die / in just a few minute / in the cold water.
Their body temperature / would drop / to a dangerously low level.
Pugh / doesn’t ever shiver.
In the water, / he can keep his body temperature at 96.8˚F (36˚C) / for as long as 30 minutes.
This is the time it take him / to complete a one-kilometer swim / (about half a mile).