Influence of food abstainment on physical quality

The difficulty in this subject consists in the following contradiction: on the one hand there is, certain experience, the data on positive influence of starvation in physiological abilities of the person, on the other hand, the method of starvation has no place in the theory and practice of physical training, and also sports. It would be interesting to understand: why for the last years the question of starvation used with the purpose of fulfillment of positive influence on a human body, more and more attracted to itself scientists' sight. After all, in our time, dosed fasting is seen as a rather adequate model for a variety of tasks: survival, recovery, self-improvement, compensation of functions and similar nuances of adaptability.