His experimentation was endless. He videotaped his training sessions and recorded all his data in a spreadsheet, hunting for inefficiencies and lost milliseconds. He experimented with pace: Was it better to go hard the first four minutes, ease off during the middle four, and “sprint” toward the end—or maintain a steady pace throughout? (A fast start, he discovered, was best.) He found that getting a lot of sleep was especially important. So was weight training: strong muscles aided in eating and helped resist the urge to throw up. He also discovered that he could make more room in his stomach
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