title: [ON THE SIGNIFICANCE OF VARIABLE LABILITY AND THE ADAPTATION OF RHYTHM IN THE PROGRESS TRAINING OF ATHLETES].
mesh_terms: D056352:Athletes; D006801:Humans; D009132:Muscles; D009420:Nervous System; D010507:Periodicity; D010827:Physiology; D012119:Respiration; D013177:Sports
keywords: MUSCLES; NERVOUS SYSTEM; PERIODICITY; PHYSIOLOGY; RESPIRATION; SPORTS
vernacular_title: O ZNACHENII PEREMENNO I LABIL'NOSTI I USVOENIIA RITMA V PROTSESSE RAZVITIIA TRENIROVANNOSTI SPORTSMENA.