Effect of Altitude Training on Muscle Oxygen Saturation in Long Distance Runners

Abstract

PURPOSE: Altitude training has been frequently used to improve aerobic endurance capacity. Whether muscle oxygen saturation can be altered after altitude training is unclear. In this study we examined the effect of 1-week altitude training on endurance capacity and muscle oxygen saturation levels in long distance runners. We also determined its effects on serum erythropoiesis. METHODS: Thirteen elite long distance runners were recruited for this study. All subjects were trained at 1850 m altitude level for 1-week and performed 3000 m running test. Serum erythropoietin concentration, red blood cell volume, endurance capacity, and muscle oxygen saturation were monitored before and after altitude training and also after 1-week later. RESULTS: We found no significant change in serum erythropoietin concentration and red blood cell volume in athletes before and after altitude training. However, 3000 m running test and muscle oxygen saturation levels were improved significantly after altitude training. CONCLUSIONS: This data suggest that one week altitude training can improve aerobic endurance capacity, independent of erythropoiesis. Improved muscle oxygen saturation may account for this improvement in altitude trained long distance runners.