Methods of assessment of the post-exercise cardiac autonomic recovery: A methodological review

Clustering vs Multi-Sets Method in Resistance Training: Effect on Heart Rate Variability

“…From a practical point of view, the present research may point out the effect of different resistance training methods on HRV, which is considered a good indicator of cardiovascular fitness fundamental to health (1). Therefore, the findings may be extremely important for professionals working in resistance training.…”

“…Although studies have indicated that resistance training performed with an intensity greater than 60% of 1RM causes autonomic nervous system disturbance, representing on the reduction of HRV (12,13), the scientific literature pointed out that exposure to repeated stimuli (aerobic exercise), as long as there is balance between stress and recovery, can lead to an increase in HRV (3,7). According to Peçanha et al (1), the increase in HRV can be explained by the optimization of the activation of the parasympathetic band and reduction of the sympathetic tone, which is explained by the reduction in plasma concentration of norepinephrine. In summary, the increase in HRV leads to a lower overload of the cardiovascular system, which, in turn, leads to a reduction in mortality risk (1).…”

“…The cardiac muscle is innervated by sympathetic and parasympathetic fibers, which stimulate secretion of norepinephrine and acetylcholine, respectively (1). The sinoatrial nodule generates electrical signals, which depolarize and repolarize the synaptic membranes, which leads to rhythmicity of the heart (2), also known as heart rate variability (HRV) (3).…”

“…These intervals represent the time interval between depolarization of the sinoatrial node to the next depolarization (2). HRV is considered an important indicator of cardiovascular fitness and/or risk (1). The higher the HRV, the better adapted is the autonomic nervous system, which reproduces in the attenuation of cardiovascular risk (4).…”

“…Chronic exposure to moderate to high physical exercise intensity leads to an increase in HRV in healthy subjects (1). However, the most findings related to the effects of physical exercise on HRV have adopted aerobic or combined exercise (aerobic + resistance training) as an intervention protocol.…”