The 4-Hour Body - An Uncommon Guide to Rapid Fat-Loss, Incredible Sex, and Becoming Superhuman - Timothy Ferriss
columns, jotted down a few notes, and defaulted to the calculator. It made no sense.
"In order for Phelps to burn those kinds of calories above and beyond what his resting
metabolic rate [RMR] was," Ray recalls, "keeping in mind that I had the calculations in front of
me, and it's about 860 calories an hour at competitive swimming rates, he would have to
sustain more than 10 hours of continuous butterfly every day. Not even he can do that."
So what was going on? Was Phelps misinforming journalists during his Olympic quest?
Sabotaging competitors foolish enough to mimic him based on interviews?
The physics didn't work.
Then, in an instant, paused over the spreadsheet, after 15 years of frustration, it all became
crystal clear:
"It was the thermal load of the water. Water is 24 times more thermally conductive than air.
Phelps spends three or four hours a day in the water."
The e ect was the same as pouring hot co ee into a metal cup instead of a ceramic mug; the
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