[Dynamics of the human respiratory system parameters at different rates of +Gz load rise].
Studies of the dynamics of human respiratory system parameters during 15-s runs with +Gz loads from 6 to 9 units and rates of rise equal to 1, 2, 3 and 5 units/s showed that increase in the rate of rise produced specific shifts in the breathing cycle structure which characterize the voluntary adaptation of humans to g-loads. Results also make it evident that despite absence of difference in the respiratory reactions during +Gz runs, in the period following exposure the distinct increases in the parameters of external breathing and gas-energy exchange correlated with the rate of g-rise. This allows the conclusion that because of the reasons discussed in the paper the physiological cost of Gz-tolerance grows as the rate of g-rise gets high.
Bukhtiiarov
I V
IV
Golovkina
O L
OL
Khomenko
M N
MN
D000222:Adaptation, Physiological / Q000502:physiology; D000337:Aerospace Medicine / Q000379:methods; D006112:Gravitation; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D008168:Lung / Q000502:physiology*; D008176:Lung Volume Measurements / Q000295:instrumentation; D011659:Pulmonary Gas Exchange / Q000502:physiology; D012137:Respiratory System; D013598:Systems Theory