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1	Širdies susitraukimo dažnio greitoji adaptacija izometrinio ir dinaminio fizinio krūvio metu ugdant jėgą / Heart rate fast adaptation to physical activity, applying izometric and dynamic physical exercises in strength training Milaševičius, Laurynas 18 May 2005 (has links) Cardiac muscle is unique because it has the capability of maintaining its own rhythm. If left to this inherent rhythmicity, the heart would beat steadily between 70 and 80 beats per minute. Extrinsic regulation provides for heart rates that may be as slow as 30 beats per minute at rest in highly trained endurance athletes and as fast as 220 beats per minute in maximum exercise. In our research we analyzed different strength training methodics, dynamic and isometric exercise’s influence to the heart rate in fast adaptation. Research showed, that while working at 80% of maximum, isometric physical activity provides higher heart rate than dynamic physical activity at the same intensity. Nursing Izometrinis Dinaminis Physical exercise ŠSD Dynamic Izometric Fizinis krūvis Fast adaptation Heart rate Širdies susitraukimų dažnis Greitoji adaptacjia