"Functional" respiratory muscle training during endurance exercise causes modest hypoxemia but overall is well tolerated - Granados, J.; Gillum, T. L.; Castillo, W.; Christmas, K. M.; Kuennen, M. R. (The Journal of Strength and Conditioning Research, 2016)
Keywords: training; respiration; muscle; endurance; training effect; hypoxia; USA; biological and medical sciences; training science; endurance sports