Qigong and L-1 straining maneuver oxygen system requirements with and without positive pressure breathing.

Author: Ryu H//Lee HS//Shin YS//Chung SM//Lee MS//Kim HM//Chung HT
Affiliation:
Department of Microbiology and Immunology, Wonkwang University School of Medicine, Chonbuk, Republic of Korea
Conference/Journal: Aviat Space Environ Med
Date published: 1994
Other: Volume ID: 24 , Issue ID: 2 , Pages: 986-91 , Special Notes: In English , Word Count: 155


Based on the characteristics of respiration and the intrathoracic pressure in Qigong (Q-G) maneuvering, it has been theorized that the Q-G maneuver may lessen the lack of coordination between aircraft oxygen apparatus and anti-G maneuvers and may be more compatible with positive pressure breathing (PPB). In an experiment intended to test this hypothesis, 5 male volunteers, trained in Q-G and L-1 maneuvers, performed the Q-G and the L-1 maneuvers without and with (PPB) at 4 and 6 kPa, respectively, with 14 respiratory parameters being measured. The results demonstrated that, when performing Q-G maneuver, the maximal expiratory flow rate averaged 1.175-1.645 L.s-1, the inspiratory peak flow, 1.003-1.297 L.s-1. Both these values
were markedly lower than those of the L-1 maneuver, and matched well the performance of current aircraft oxygen apparatus. From the blood pressure and heart rate values, it is evident that PPB can further promote the blood pressure-raising effect of the Q-G maneuver, and alleviate pilots' fatigue.

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