Hematological change in venous blood of the lower leg during prolonged sitting in a low humidity and hypobaric environment

Kazuaki Yamashita, Katsuki Yamaguchi, Tsuneyuki Yamamoto, Shuntaro Shirabe, Nobuko Hashiguchi, Masahide Kaji, Yutaka Tochihara

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)


The present study examined the effects of low humidity and hypobaric conditions on hematological change in venous blood of the lower leg during quiet prolonged sitting. Ten healthy male students participated as the subjects after singing a consent form to participate in this study. Their diet and water intake were controlled from 19:00 on the day before the experiments. The subjects sat for 130 min in a climatic chamber. Four experimental conditions in the chamber were designed from a combination of relative humidity (20% or 60%) and air pressure (sea level or equivalent to an altitude of 2,000 m). Ambient temperature was maintained at 24°C in every condition. Venous blood was sampled from the lower leg before and after exposure to the experimental conditions, and was analyzed for blood viscosity and hematological indices. Also, body weight and leg circumference were measured as indices of total water loss and edema, respectively. Regarding the results of ANOVA, significant interactions between humidity and time were observed in blood viscosity, red blood cell count and hematocrit (each p<0.05). However, there were no significant differences in these indices among the conditions. Significant increases were observed in leg circumference (p<0.01), platelet count (p<0.05) and total protein (p<0.05) after the exposure compared with those before the exposure. There were no noticeable effects of hypobaric conditions in every measurement. In conclusion, prolonged sitting seems to be a more hazardous factor for thrombogenesis low humidity and hypobaric conditions during a long-distance flight.

ジャーナルJournal of physiological anthropology and applied human science
出版ステータス出版済み - 2005

!!!All Science Journal Classification (ASJC) codes

  • 社会科学(全般)


「Hematological change in venous blood of the lower leg during prolonged sitting in a low humidity and hypobaric environment」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。