Athletic Dark Holes

Some debate on the validity or concept of the dark hole in physics, there is no doubt that they exist in training athletes. Throughout my career I have had athletes disappear into dark holes never to reappear or if they did they were a shadow of their former selves. What is an athletic dark hole? Biased one sided training that emphasizes development of one physical quality to the exclusion of all others. The two biggest and most frequently occurring dark holes are strength training to the exclusion of everything else an emphasis on aerobic work to build a base that then takes away all explosiveness. Neither physical quality is bad unto themselves but without context they possess the potential to kill an athlete. All components of training must be trained during all phases of the training year in the context of the objectives of that phase and the needs of the individual athlete. No physical quality is an end unto itself, they all must interact with the result a synergistic effect producing a highly adaptable athlete.