The paper presents a brief review on how some concepts on the organism general adaptational reactions developed, including their role in increasing the unspecific resistance in the organism. Demonstrated is periodicity of the patterns of anti-stressor type reactions (training, calm and elevated activation) and stress in a wide range of stimulation values. The concepts on the organism adaptational reactions and reactivity levels have created the theoretical basis for practical applications of

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... activation therapy aimed at health improvement, prevention and treatment of various diseases, including oncology. Evidence data on the applications of the activation therapy as a promising approach to the organism state control are confirmed by the originators of this scientific discovery, their followers and medical experts.