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Abstract
Background: Aging is associated with considerable decline in efficiency of the immune system; Physical exercise might be effective in slowing the rate of the immunity decline. Objective: To investigate the effect of Whole Body Vibration (WBV) exercises on CD16% of natural killer cells in sedentary elderly people. Subjects and methods: Thirty elderly subjects 15 males and 15 females were participated in the study, their age ranged from 65 to 75 years. They received (WBV) exercise at 35 Hz three times per week for three months. Results: there was a significant increase in CD16% of natural killer cells. The mean value and SD of CD16% in the study group before the study period was 18.353% ± 3.680, while after the study period it was 22.140 ± 3.150 with 22.337% percentage of improvement, there was non- significant correlation between percentage of improvement of CD16% , sex and age in the group. Conclusion: it can be concluded that Whole Body Vibration exercise improves the immunity specially CD16% of natural killer cells in sedentary elderly people