Aspects Of Respiratory Muscle Fatigue In A Mountain Ultramarathon Race

“Ultramarathon running offers a unique possibility to investigate the mechanisms contributing to the limitation of endurance performance. Investigations of locomotor muscle fatigue show that central fatigue is a major contributor to the loss of strength in the lower limbs after an ultramarathon. In addition, respiratory muscle fatigue is known to limit exercise performance, but only limited data are available on changes in respiratory muscle function after ultramarathon running and it is not known whether the observed impairment is caused by peripheral and/or central fatigue.”

Conclusion:

“Ultraendurance running reduces respiratory muscle strength for inspiratory muscles shown to result from significant peripheral muscle fatigue with only little contribution of central fatigue. This is in contrast to findings in locomotor muscles. Whether this difference between muscle groups results from inherent neuromuscular differences, their specific pattern of loading or other reasons remain to be clarified.”

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Aspects of Respiratory Muscle Fatigue in a Mountain Ultramarathon Race

Recently published in Medicine & Science in Sports & Exercise by the American College of Sports Medicine, is this study that looked into aspects of respiratory muscle fatigue in a mountain ultramarathon race.

STUDY

Aspects of Respiratory Muscle Fatigue in a Mountain Ultramarathon Race

Purpose:

Because endurance is a requirement of the ultramarathon, this type of running offers a unique opportunity for the study of the mechanisms that contribute to limitation of performance, with central fatigue proving to be major contributor to the loss of strength in the legs. As well as this, fatigue of the respiratory muscles has already been shown to be a limiting factor in sports performance, but it is not known whether the observed impairment is caused by peripheral and/or central fatigue.

Conclusion:

“Ultraendurance running reduces respiratory muscle strength for inspiratory muscles shown to result from significant peripheral muscle fatigue with only little contribution of central fatigue. This is in contrast to findings in locomotor muscles. Whether this difference between muscle groups results from inherent neuromuscular differences, their specific pattern of loading or other reasons remain to be clarified.”

POWERbreathe Inspiratory Muscle Training will subject your inspiratory muscles to an appropriate training resistance, increasing their strength, power and stamina and reducing fatigue.

Aspects of Respiratory Muscle Fatigue in a Mountain Ultramarathon Race

This abstract (Epub ahead of print) was published July 16th 2014 in Medicine and Science in Sports and Exercise.

STUDY:

Aspects of Respiratory Muscle Fatigue in a Mountain Ultramarathon Race. 

Wüthrich TU, Marty J, Kerherve H, Millet GY, Verges S, Spengler CM.

Abstract:

“Ultra-marathon running offers the unique possibility to investigate the mechanisms contributing to the limitation of endurance performance. Investigations of locomotor muscle fatigue show that central fatigue is a major contributor to the loss of strength in lower limbs after an ultra-marathon. Also respiratory muscle fatigue is known to limit exercise performance but only limited data are available on changes in respiratory muscle function after ultra-marathon running and it is not known whether the observed impairment is caused by peripheral and/or central fatigue.”

Conclusions:

“Ultra-endurance running reduces respiratory muscle strength, for inspiratory muscles shown to result from significant peripheral muscle fatigue with only little contribution of central fatigue. This contrasts findings in locomotor muscles. Whether this difference between muscle groups results from inherent neuromuscular differences, their specific pattern of loading or other reasons remains to be clarified.”

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