The Balance Principle dictates that all training must be properly proportioned in order to achieve optimal results. This broad principle operates at many levels of human performance. All things in moderation applies to sports training as well general health and well being.
This principle suggests that the right mix of training activities, diet, and healthy lifestyle habits are required for optimal functioning. Going to extremes can result in poor performance, illness, and injury. Overtraining, consuming too much of certain foods and nutrients (even water), or adopting crash diets are examples.