The effects of different inspiratory muscle training 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. A total of 66 subjects were randomly assigned to one of three groups. One group trained at 100% of maximum inspiratory pressure (MIP) for 6 weeks (MAX, n=22). A second group performed 6 weeks of inspiratory muscle training at 80% of MIP (SUB, n=21) and a third control group received no inspiratory training (CON, n=23). Both the MAX and SUB training groups improved MIP relative to the control group [32 (19) cmH(2)O, P=0.01; 37 (25) cmH(2)O, P=0.001, respectively]. A significant decrease in heart rate [-6 (9) beats min(-1), P=0.02] and rating of perceived exertion [-0.5 (1.4), P=0.04] was observed for the MAX group only. It is concluded that 6 weeks of both MAX and SUB training were sufficient to improve inspiratory muscle strength. However, exercising heart rate and perceived exertion decreased with MAX training only.
Field of Health and Exercise Science, School of Applied Sciences, University of Glamorgan, Pontypridd, CF37 1DL, UK. adgething@btopenworld.com
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Gething
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Passfield
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Davies
D000222:Adaptation, Physiological / Q000502:physiology; D000328:Adult; D001945:Breathing Exercises; D015444:Exercise / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D001239:Inhalation / Q000502:physiology*; D007320:Inspiratory Capacity / Q000502:physiology*; D008297:Male; D010465:Perception / Q000502:physiology; D010806:Physical Education and Training / Q000379:methods; D005082:Physical Exertion / Q000502:physiology*; D012129:Respiratory Function Tests; D012132:Respiratory Muscles / Q000502:physiology*