Contribution Of Respiratory Muscle Blood Flow To Exercise-Induced Diaphragmatic Fatigue In Trained Cyclists

“This study investigated whether the greater degree of exercise-induced diaphragmatic fatigue previously reported in highly trained athletes in hypoxia (compared with normoxia) could have a contribution from limited respiratory muscle blood flow.”

Conclusion:

“When respiratory muscle energy requirement is not different between normoxia and hypoxia, diaphragmatic fatigue is greater in hypoxia as intercostal muscle blood flow is not increased (compared with normoxia) to compensate for the reduction in PaO2 , thus further compromising O2 supply to the respiratory muscles.”

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