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- W1999463992 abstract "Immune function decreases with age, rendering the elderly more susceptible to infection and tumor development. In addition, intense exercise has been shown to decrease immune function in some populations. Few studies have examined the effects of exercise on immune function in the elderly and, to our knowledge, no studies have examined the effects of exercise on a population of active, but nonexercising elderly.The purpose of this study was to examine the effects of a 10-week endurance training program on selected parameters of immune function in active elderly women.A total of 29 healthy, active women, aged 70-87, were randomly assigned to either an exercise (76 +/- 5 years, n = 15) or control (77 +/- 6 years, n = 14) group. The exercise group walked 3 days/week at 70% heart rate reserve (HRR). The duration on day 1 was 20 min and it was increased by 5 min each day until subjects were walking for 50 min (week 3). It remained at 50 min for the duration of the study, while controls maintained normal activity. Blood samples were obtained from both groups at rest, and from the exercise group after 20 min of walking at 70% HRR and after 2 h of recovery. Blood samples were collected prior to endurance training and again after 10 weeks of endurance training.There was a significant decrease in 1-mile walk times as well as heart rate at completion of the walk in the exercise group. Natural cell-mediated cytotoxicity (NCMC) was significantly higher post-exercise, compared to pre-exercise both before and after training. After training it remained significantly elevated 2 h post-exercise. The resting NCMC was significantly decreased in controls at week 10 but not in the exercise group.Ten weeks of endurance training resulted in a significant decrease in both the 1-mile walk time and the post-walk heart rate in the exercisers but not the controls, without resulting in either an acute or chronic suppression of immune function. Further, endurance training may lead to an attenuation of the decrease in cellular immune measures which occurs during the winter, since the control group experienced a decrease in NCMC and the exercisers did not." @default.
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- W1999463992 date "2000-01-01" @default.
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- W1999463992 title "Effects of Endurance Training on Selected Parameters of Immune Function in Elderly Women" @default.
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- W1999463992 doi "https://doi.org/10.1159/000022142" @default.
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