Athletics in the North of the Russian Federation has significant features that are to be studied within the framework of human ecology. In this case, of particular importance are studies that are associated with controlled physical activity. The aim was to study the state of the parasympathetic and sympathetic autonomic nervous system of athletes regulating heart functioning under controlled physical activity. Methods: Data collection was performed on a group of 16 athletes according to the Helsinki Declaration. In total, 14 parameters of the cardiovascular system were recorded using the "Elox-01" and the parameters of quasi-attractors were calculated for the five-dimensional phase space. Results. Before the load (1,5 hours of playing mini-football), the indicator of parasympathetic (PAR) regulation prevailed almost 9 times (PAR = 16 c.u.) over the sympathetic (SIM) regulation (SIM = 1,75 c.u.). After the load, these indices became equal, but the volumes of quasi-attractors increased by 29 times. Conclusions. Athletes in the North of the Russian Federation can't significantly invert the state of SIM and PAR even after the load. The load only levels these indicators, but at the same time the volume of the quasi-attractor in the five-dimensional phase space of the states of diagnostic signs of the cardiovascular system of athletes increases. Such dynamic differs from the dynamics of the athletes of the Central Part of the Russian Federation, where the SIM indicator initially prevails over the PAR indicator.
Ряд исследователей, изучавших параметры нейросетей мозга, указывали на отсутствие устойчивости и периодичности в работе нейросетей [6-9, 15, 16]. При этом подчеркивалось, что не периодически работающие нейроны могут участвовать в организации периодических движений и наоборот [6-9, 19]. В этой связи возникает закономерная необходимость изучения возможности хаотической работы и других биогенераторов (периодических процессов), например, работы сердца [1, 3-5, 10, 17]. Может ли ритмика сердца быть строго устойчивой, или к кардиоинтервалам (КИ) можно применить гипотезу Н. А. Бернштейна о «повторении без повторений» [2]? Напомним, что еще в 1947 г. Н. А. Бернштейн выдвинул эту гипотезу [2] в регуляции движений. За последние 20 лет гипотеза Бернштейна получила подтверждение в виде эффекта Еськова-Зинченко не только в биомеханике, но и во всей физиологии [1, 10, 11, 16-20]. Если выборки КИ будут статистически неустой-УДК (612.171.1+612.084)(571.122
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