Interview with David Epstein: How Athletes Get Great | Books | OutsideOnline.com:
No cookie-cutter training plan is ever going to work… People need to pay attention to their training plans, because if something is not working for you as well as the next guy, it may be your biology, so you should try another plan. If you’re not taking a trial-and-error approach to training where you’re measuring something your time, you’re way less likely to find a plan that works for you. The cookie cutter approach to training is purely a facet of having a large group of people to train.