Ferriss is on the bleeding edge of a new trend in self-tracking and experimentation. “It’s happening because almost everyone has a data-gathering device,” he says. “It’s never been easier to gather your own data in an actionable way.” Case in point is one of his former investments, DailyBurn.com, which tracks your diet and workout sessions using an iPhone. Other sites such as CureTogether.com let you open-source clinical trials, so you can see which do-it-yourself experiments work. Meanwhile, new organizations like the Quantified Self and the Immortality Institute are connecting self-experimenters who want to trade data in a centralized fashion.
Tim Ferriss is an interesting fellow. His approach to fitness can simply be summed up as a combination of aggressiveness, self-monitoring, and the scientific method.