varied, low-fat diet. Cross-train to prevent injury and burnout.These are simple concepts, well within my grasp (and yours). When we follow them, life is good. There has, though, always been one more key principle: avoid the demon lactic acid

of triathletes and cyclists. We tend to have bigger legs and to run more stiffly." Carmichael says Armstrong moves oxygen as well as anyone, burns more fat than most endurance athletes (a good thing), and is able to cycle very hard without producing much lactic

participants had improved their maximal oxygen uptake by an average of 4.2 per cent and their lactate-threshold running speed by 2.3 per cent. As a bonus, they had also reduced their body fat by an average of 8.7 per cent. "We think the results show that our