Respiratory Muscle Power And The Slow Component Of O2 Uptake

“The slow component of O2 uptake represents a progressive decline in work efficiency during strenuous, constant work rate cycling. Although most of this “excess” O2 uptake can be explained by factors intrinsic to the exercising muscles, it has been proposed that respiratory muscle work rate may also contribute to the O2 uptake response.”

Conclusion:

“This investigation supports the thesis that the energetic contribution from respiratory muscles to the O2 uptake amplitude is disproportionately higher during severe-intensity exercise compared with that during heavy-intensity exercise.”

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Respiratory Disorders In Endurance Athletes – How Much Do They Really Have To Endure?

“Respiratory disorders are often a cause of morbidity in top level endurance athletes, more often compromising their performance and rarely being a cause of death… An overview of the main tools both enabling the diagnosis of respiratory impairment in endurance athletes in a clinical and preclinical phase has also been described.”

Conclusion:

“Taking up the question of the title of this report, the researchers can say that every endurance athlete has their own limit in endurance training that once passed will produce all the possible respiratory disorders described in the report.”

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Locomotor And Diaphragm Muscle Fatigue In Endurance Athletes Performing Time-Trials Of Different Durations

“Fatigue in leg muscles might differ between running and cycling due to inherent differences in muscle activation patterns. Moreover, postural demand placed upon the diaphragm during running could augment the development of diaphragm fatigue.”

Conclusion:

“Diaphragm fatigue likely resulted from the large ventilatory load which is characteristic for both exercise modalities and which was higher in 15TTs than in 30TTs (+27 %, p < 0.01) while postural demand appears to be of less importance.”

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Effects Of Respiratory Muscle Training On Respiratory Mechanics And Energy Cost

“Resistance respiratory muscle training (RRMT) increases respiratory muscle strength and can increase swimming endurance time by as much as 85%. The purpose of this study was to examine potential mechanisms by which RRMT improves exercise endurance.”

Conclusion:

“Most importantly, respiratory muscle efficiency increased (+83% at 2.7 ATA submersed i.e. atmosphere absolute).”

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