Effects of physiological salt water injection after 20 days of head down tilt bed rest on maximal aerobic power in young males.
There is such a speculation that if the decrease in plasma volume (PV) makes central blood volume (CBV) and stroke volume (SV) reduce during prolonged BR, but if the changes in red cell volume (RCV) is little and a physiological salt water (PSW) volume matched to a body fluid loss is injected, then the increased PV would make CBV increase and the increase would contribute to prevent the decrease of SVmax as well as maximal cardiac output (COmax ). As a result, maximal oxygen uptake (VO2max ) would be come up to the before BR level. In the present study, to investigate the speculation, maximal exercise test immediately following the injection of PSW after prolonged head down tilt bed rest (HDTBR) was performed and compared to the before BR level in young males.
Suzuki
Y
Y
Department of Health Administration, The University of Tokyo, Japan.
Takenaka
K
K
Kobayashi
H
H
Haruna
Y
Y
Kawakubo
K
K
Gunji
A
A
D000293:Adolescent; D000328:Adult; D001510:Bed Rest; D001810:Blood Volume / Q000187:drug effects* / Q000502:physiology; D002302:Cardiac Output; D004906:Erythrocyte Count; D015444:Exercise; D005080:Exercise Test; D018475:Head-Down Tilt; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000187:drug effects* / Q000502:physiology; D010953:Plasma Volume / Q000187:drug effects* / Q000502:physiology; D012965:Sodium Chloride / Q000494:pharmacology*; D018474:Weightlessness Simulation
D012965:Sodium Chloride