The Effect Of Inspiratory Muscle Training On High-Intensity, Intermittent Running Performance To Exhaustion

“This studied the effects of inspiratory muscle training (IMT) on maximal 20m shuttle run performance during Yo-Yo intermittent recovery test and on the physiological and perceptual responses to the running test were examined.“


“Findings suggest that although both inspiratory muscle training and warm-up improve the tolerance of intense intermittent exercise, the underlying mechanisms may be different.”

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Occurrence of Core Muscle Fatigue During High-Intensity Running Exercise and its Limitation to Performance

“The purpose of this study was to investigate the occurrence of core muscle fatigue during high-intensity running exercise and its limitation to exercise performance. A secondary aim was to investigate whether respiratory muscle work performed during intense running periods, would contribute to core muscle fatigue.”


“Core muscle function in endurance runners subsequent to intense running to exhaustion was impaired with fatigue. With the preceded core muscle fatigue workout, the endurance capacity for performing intense running was reduced. In mimicking the respiratory responses recorded during intense running while the runners were standing upright and free from whole-body exercise, core muscle function decreased.

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Inspiratory Muscles Experience Fatigue Faster Than Calf Muscles During Treadmill Marching

“The aim of this study was to determine whether treadmill marching exercise induces respiratory muscle fatigue, and to compare the extent and rate of respiratory muscle fatigue to those of the calf musculature.


“Results indicated that:

  1. the inspiratory and calf muscles are the ones experiencing the most dominant fatigue during treadmill marching
  2. the rate of fatigue of each muscle group was monotonic between the initial and terminal phases of exercise
  3. the inspiratory muscles fatigue significantly faster than the calf at the terminal phase of exercise, and are likely to fatigue faster during the initial exercise as well.

Accordingly, this study supports the hypothesis that fatigue of the inspiratory muscles may be a limiting factor during exercise.”

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A Comparison Of Inspiratory Muscle Fatigue Following Maximal Exercise In Moderately Trained Males And Females

“Exercise-induced inspiratory muscle fatigue (IMF) has been reported in males but there are few reports of IMF in females. It is not known if a gender difference exists for inspiratory muscle strength following heavy exercise, as is reported in locomotor muscles.”


“Inspiratory Muscle Fatigue observed immediately following maximal exercise, demonstrated the same pattern of recovery for both genders.”

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Exercise-Induced Diaphragmatic Fatigue In Healthy Humans

“In part of this study, twelve healthy subjects (33 +/- 3 years) with a variety of fitness levels exercised at 95 and 85% VO2, max to exhaustion.


“Significant diaphragmatic fatigue is caused by the ventilatory requirements imposed by heavy endurance exercise in healthy persons with a variety of fitness levels. The magnitude of the fatigue and the likelihood of its occurrence increases as the relative intensity of the exercise exceeds 85% of VO2, max.”

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