10. Supplements are necessary for maximum performance.
There are a lot of nutritional supplements that are marketed to endurance athletes with claims of enhancing endurance performance. Some of these claims are backed by a little bit of scientific evidence, but no nutritional supplement has ever been proven to enhance endurance performance significantly by a large number of studies without being counterbalanced by other studies showing no benefit. And most of the world’s best runners consume no nutritional supplements.
Matt Fitzgerald is the author of Racing Weight (VeloPress, 2009).