고지훈련에 의한 total leukocytes와 leukcytes subsets의 변화 = The effects of altitude training on leukocyte and leukocyte subsets

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the effects of altitude training on leukocyte and leukocyte subsets in Korean junior alpine skiers. Six male skiers volunteered as subjects and their physical characteristics were as follows: age, 15.3±2.1yrs: height, 166.7±7.8cm; weight, 67.7±11.1kg and skiing experience, 3.67±1.8yrs.
All subjects stayed at 2,100m a.s.1., Tignes, France, and trained for 5hrs(7:30∼12:30)/day, 6day/wk for 5wks at 2,700m a.s.l. The type of training performed during the altitude sojourn was a slalom and giant slalom mixed skiing, and the skiing intensity in terms of heart rate was 160∼180beats/min at the end of each trial of skiing.
During 5wk of altitude training, total leukocyte concentrations tended to be increased from 6,680±1,300/mm³to 7,400±1,737.8/mm³ after one day sojourning at altitude(alti 1) but continued training at altitude resulted in a decrease of total leukocyte almost back to prealtitude level when returned to sea level. However, these changes were not significantly different. In addition, no significant changes in both leukocyte subset concentrations and proportions were found.
These results indicate that 5wk of altitude training at 2,700m resulted in no significant changes in alpine skier's immune system. But the mechanisms of abrupt increase in total leukocytes and subsequent decrease in total leukocytes after acclimatization and/or altitude training should be verified.