Inspiratory Muscle Warm-Up And IMT: Separate And Combined Effects On Intermittent Running To Exhaustion

“This study examined the independent and combined effects of an inspiratory muscle warm-up and inspiratory muscle training on intermittent running to exhaustion.”

Conclusion:

“Inspiratory muscle training and inspiratory muscle warm-up can both increase running distance independently, but the greatest increase is observed when they are combined.”

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Specific Inspiratory Muscle Warm-Up Enhances Badminton Footwork Performance

For this study “the effects of inspiratory muscle warm-up on inspiratory muscle function and on the maximum distance covered in a subsequent incremental badminton-footwork test were examined.”

Conclusion:

“Findings suggest that the inspiratory mucsle-specific warm-up improved footwork performance in the subsequent maximum incremental badminton-footwork test. The improved footwork was partly attributable to the reduced breathless sensation resulting from the enhanced inspiratory mucsle function, whereas the contribution of the concomitant reduction in blood lactate accumulation was relatively minor.

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Influence Of Acute Inspiratory Loading Upon Diaphragm Motor-Evoked Potentials In Healthy Humans

“Acute prior activity of the inspiratory muscles can enhance inspiratory muscle strength and reduce effort perception during subsequent inspiratory efforts. However, the mechanisms subserving these changes are poorly understood.” This is what was investigated.

Conclusion:

“Data indicate that after inspiratory muscle loading, increased global inspiratory strength is accompanied by increased peripheral excitability and by a dampening of corticospinal excitability of the diaphragm.”

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Inspiratory Muscle Training Improves Rowing Performance

“The purpose of this study was to investigate the effects of a period of resistive inspiratory muscle training (IMT) upon rowing performance.”

Conclusion:

“IMT improves rowing performance on the 6-min all-out effort and the 5000-m trial.”

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Specific Respiratory Warm-Up Improves Rowing Performance And Exertional Dyspnea

“The purpose of this study was a) to compare the effect of three different warm-up protocols upon rowing performance and perception of dyspnea, and b) to identify the functional significance of a respiratory warm-up.”

Conclusion:

“Data suggest that a combination of a respiratory warm-up protocol together with a specific rowing warm-up is more effective than a specific rowing warm-up or a submaximal warm-up alone as a preparation for rowing performance.”

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Effect Of Specific Inspiratory Muscle Warm-Up On intense Intermittent Run To Exhaustion

“In this test the effects of inspiratory muscle warm-up on the maximum dynamic inspiratory muscle function and the maximum repetitions of 20-m shuttle run in the Yo-Yo intermittent recovery test were examined.”

Conclusion:

“Findings suggested that the specific inspiratory muscle warm-up may entail reduction in breathlessness sensation, partly attributable to the enhancement of dynamic inspiratory muscle functions, in subsequent exhaustive intermittent run and, in turn, improve the exercise tolerance.”

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IMT Reduces Blood Lactate Concentration During Volitional Hyperpnoea

“Although reduced blood lactate concentrations have been observed during whole-body exercise following inspiratory muscle training (IMT), it remains unknown whether the inspiratory muscles are the source of at least part of this reduction. This investigation tested the hypothesis that IMT would attenuate the increase in blood lactate concentrations caused by mimicking, at rest, the breathing pattern observed during high-intensity exercise.”

Conclusion:

“After 6 weeks, increases in blood lactate concentrations during volitional hyperpnoea were unchanged in the control group. Conversely, following IMT the increase in blood lactate concentrations during volitional hyperpnoea was reduced by 17 ± 37% and 25 ± 34% following 8 and 10 min, respectively (P < 0.05). In conclusion, increases in blood lactate concentrations during volitional hyperpnoea at 85% maximal exercise minute ventilation were attenuated following IMT.”

“These findings suggest that the inspiratory muscles were the source of at least part of this reduction, and provide a possible explanation for some of the IMT-mediated reductions in blood lactate concentrations often observed during whole- body exercise.”

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Blood Lactate During Recovery From Intense Exercise: Impact Of Inspiratory Loading

“It has long been suggested that inspiratory muscle activity may impact blood lactate levels during the recovery from dynamic exercise. In this study, we tested the hypothesis that inspiratory muscle activation during recovery from intense exercise would contribute to Lactate clearance, thus leading to reduced blood lactate levels.:

Conclusion:

“These data are consistent with the notion that inspiratory muscles may be net consumers of lactate during recovery from intense exercise.”

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Inspiratory Resistive Loading After All-Out Exercise Improves Subsequent Performance

Previous studies have shown that post-exercise inspiratory resistive loading reduces blood lactate. In this study, we tested the hypothesis that inspiratory resistive loading during recovery could improve subsequent exercise performance.

Conclusion:

“Inspiratory resistive loading during recovery from all-out maximal-intensity exercise decreases blood lactate and perception of leg effort with beneficial effects on peak and mean power on subsequent supra-maximal exercise in healthy males. Our results provide rationale for using post-exercise inspiratory resistive loading as an ergogenic aid and future studies should be conducted to better evaluate the mechanisms responsible for this effect.”

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Pressure Threshold IMT Improves Submaximal Cycling Performance

“Improvements in submaximal endurance performance have been reported following 4 weeks of respiratory muscle training comprising isocapnic hyperpnea (Boutellier et al., 1992).  The purpose of the present study was to examine whether similar effects would be observed using resistive, flow independent loading of the inspiratory muscles.”

Conclusion:

Whilst preliminary in nature, these results indicate that resistive, flow independent inspiratory muscle training improves submaximal exercise performance in endurance trained subjects. Furthermore they add credibility to Boutellier’s assertion that, “the respiratory system is an exercise limiting factor in normal, endurance trained subjects.”

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