[The periodic action of cold and body resistance]

The analysis of phenotypic cold adaptation mechanisms and their cross-effects is presented in the review. The literature data and the author's laboratory researches became the basis of point that the cross-effects of cold adaptation develop owing to unspecific stress mechanisms. The negative cross-effects are caused by significant stress-reaction arising as a rule during continue cold action. On the other hand during the periodic action of moderate cold the stress-limiting systems power increases and mainly the positive cross-effects are formed.