The purpose of the study was to examine effect of circuit weight training on immune response in middle-aged women. Circuit weight training(9 items) are practiced for 12 weeks (4 times a week) based on exercise group : 7 and control group : 7, with 3 sets exercised during 50 minutes a s 1/2 of the maximum repetitions of 1 minute for each item in 9 items. WBC and CBC diff count were determined by cell counter. The results of this study can be summarised as follows : 1. The number of leukocyte, the percentage and absolute number of neutrophil, lymphocyte, monocyte, eosinophil and basophil are found to have a significantly increase, respectively after 12 weeks circuit weight training in exercise group(p<.05, p<.0l). 2. However, the above 6 items are found to have no change after weeks in control group without exercise. 3. After 12 weeks circuit weight training. exercise group¡¯s neutrophil/lymphocyte ratio decreased by 15% while that of control group decresed by 2%. In the above results, the groups participated in 12 weeks circuit weight training is found to have a positive influence on immune response.
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