Whats the point of incorporating diverse physical challenges into a triathletes training regimen when its clear that the vast majority of competitors are already overtraining and suffering from chronic injuries? Is the goal to further exacerbate the problem by adding more stress and variability to their workouts, or is there some actual scientific evidence to support the notion that this approach leads to improved overall strength and performance? It seems to me that the emphasis on diversity and variability in training is just a euphemism for we dont actually know what were doing, so lets just throw a bunch of different things at the wall and see what sticks. Can anyone provide a coherent explanation for why this approach is supposed to be beneficial, or are we just blindly following the latest trends and fads in endurance training?