Good article. He's one tough MF. Speaks to the power of one's mind in increasing one's performance.
"Yet Robic does not excel on physical talent alone. He is not always the fastest competitor (he often makes up ground by sleeping 90 minutes or less a day), nor does he possess any towering physiological gift. On rare occasions when he permits himself to be tested in a laboratory, his ability to produce power and transport oxygen ranks on a par with those of many other ultra-endurance athletes. He wins for the most fundamental of reasons: he refuses to stop."