Acute Effects Of Different Inspiratory Resistive Loading On Heart Rate Variability In Healthy Elderly Patients

“The cardiovascular system is noticeably affected by respiration. However, whether different inspiratory resistive loading intensities can influence autonomic heart rate (HR) modulation remains unclear. The objective of this study was to investigate HR modulation at three different inspiratory resistive loading intensities in healthy elderly men.”

Conclusion:

“Results suggest that lower inspiratory efforts produce higher heart rate variability. These findings represent important clinical applications because low respiratory muscle training intensities can produce greater parasympathetic heart rate modulation in this population. Thus, we should choose the most appropriate load for achieving the most beneficial autonomic effects, which are associated with reduced cardiovascular event and morbidity incidence.”

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Influence Of Different Breathing Frequencies On Severity Of Inspiratory Muscle Fatigue Induced By High-Intensity Front Crawl Swimming

“The aim of this study was to assess the influence of two different breathing frequencies on the magnitude of inspiratory muscle fatigue after high-intensity front crawl swimming.”

Conclusion:

“Data suggested that there is significant global inspiratory muscle fatigue after high-intensity swimming. Inspiratory muscle fatigue is, however, greater when breathing frequency is reduced during high-intensity front crawl swimming. Respiratory muscle training should be used to improve respiratory muscle strength and endurance in swimmers.”

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Inspiratory Muscle Training Attenuates The Human Respiratory Muscle Metaboreflex

“Researchers of this study hypothesized that inspiratory muscle training (IMT) would attenuate the sympathetically mediated heart rate and mean arterial pressure increases normally observed during fatiguing inspiratory muscle work.”

Conclusion:

“Findings demonstrate that 5 weeks of resistive inspiratory muscle training is capable of increasing inspiratory muscle strength and attenuating the time-dependent rise in mediated heart rate and mean arterial pressure that occurs with resistive inspiratory work in healthy males.”

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The Effects Of Different IMT Intensities On Exercising Heart Rate And Perceived Exertion

“This study investigated the relationship between the intensity of an inspiratory muscle training programme and its effect on respiratory muscle strength, exercising heart rate, and ratings of perceived exertion.”

Conclusion:

Six weeks of both MAX (subjects that trained at 100% of maximum inspiratory pressure i.e. MIP) and SUB (subjects that trained at 80% MIP) training were sufficient to improve inspiratory muscle strength. However, exercising heart rate and perceived exertion decreased with MAX training only.

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