14日間の常圧低酸素室を利用したLive high, train lowが血液性状および平地での持久的運動能に及ぼす影響

抄録

The purpose of this study was to investigate the effects of a live high-train low (LHTL) model of altitude training on erythropoiesis and exercise capacity at sea level. The LHTL group (n=5) were kept in a normobaric-hypoxic room (15.4%O_2) for 10-12 h per night for 14 days. The control group (CONT: n=5) were exposed to normoxic conditions. Erythrocyte parameters, maximum and submaximum exercise capacity were measured over the experimental period. Red cell count (RBC) and hemoglobin concentration were not increased by LHTL. The exercise time of the LHTL group was significantly increased from 19:07±0:44 to 19:40±0:55 (2.8%)(p<0.05). Power output at onset of blood lactate accumulation of the LHTL group tended to increase as compared with CONT. These data indicate that 14 days LHTL would be insufficient to increase RBC or Hb, but could improve aerobic performance at sea level.