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标题：The Metabolic Cost of Walking in Simulated MartianGravity and its Implications
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作者：Elliot Brown ; Elliot Brown ; Thais Russomano 等
期刊名称：Journal of exercise physiology online
印刷版ISSN：1097-9751
出版年度：2018
卷号：21
期号：1
页码：25-35
语种：English
出版社：American Society of Exercise Physiologists
摘要：Brown E, Russomano T, Bueno B, Bandeira L, Disiuta L,Lamadrid I, da Rosa M, de Lima JCM, Baptista RR, da Luz DiasR. The Metabolic Cost of Walking in Simulated Martian Gravity andits Implications. JEPonline 2018;21(1):25-35. Lower body positivepressure (LBPP) is an effective way of simulating hypogravity. Thisstudy measured the submaximal VO2, VCO2 and heart rate whenwalking on an LBPP treadmill at 1G and simulated Martian gravity(0.38G). Twelve healthy subjects with a mean age ± SD of 22.75 ±5.38 yrs took part in this study with full consent. The LBPP box usedwas designed and built by the Microgravity Center. The subjectswalked for 8 min at a control of 1G and then for another 8 min insimulated 0.38G 2 wks later. VO2 was 1.00 ± 0.61 L·min-1at 1G and0.68 ± 0.33 L·min-1 in the simulated 0.38G (P<0.05). Average caloricexpenditure was significantly reduced at simulated Martian gravity(4.79 ± 2.80 kcal·min-1) when compared to the control (3.37 ± 1.49Kcal·min-1) (P<0.05). The subjects’ HR was reduced from 118.49 ±15.07 beats·min-1at 1G to 106.20 ± 11.17 beats·min-1at simulated0.38G (P<0.05). The average respiratory exchange ratio wassignificantly increased from 0.83 ± 0.13 to 1.14 ± 0.19 in simulated0.38G (P<0.05), with no significant difference seen in VCO2. Energyconsumption was significantly decreased when walking in LBPPsimulated hypogravity. Further research into LBPP physiology canbe used to calibrate EVA suits and advise on exercise regimes forfuture astronauts.
关键词：Hypogravity;LBPP;VO2 max;Walking