|
KMID : 0613820070170081166
|
|
Journal of Life Science
2007 Volume.17 No. 8 p.1166 ~ p.1171
|
|
|
Immunological Aspects of Contemporary Exercise
|
|
Kwak Yi-Sub
Baek Yeong-Ho
Kim Chu-Woo
|
|
|
Abstract
|
|
|
|
Exercise is the strongest stress to which the body is ever exposed. The body responds to this stress through a set of physiological changes in its metabolic, hormonal, and immunological systems. In this study, responses of the immune system to the long-term aerobic and anaerobic exercises have been investigated. Regular moderate exercise is associated with a reduced incidence of infection compared with a sedentary groups. Aerobic training increases the heart rate and enhances the body’s intake of oxygen long enough to benefit the condition of the body. In recent years, the importance of exercise in everyday life has been rapidly increasing. Moderate exercise appears to stimulate the immune system. And also, Exercise elicits an increase in the numbers of circulating lymphocytes and lymphocyte subsets (including NK cells) which is followed by a decrease in the numbers of cells during recovery from exercise. However, prolonged bouts of strenuous exercise cause a temporary depression of various aspects of immune functions (e.g. lymphocyte proliferation, monocyte antigen presentation, open window periods, exercise induced asthma, exercise induced anaphylaxis) that usually lasts 2-24 hr after exercise depending on the intensity and duration of the exercise bout. Exercise-induced bronchoconstriction (EIB) was defined as a decrease of at least 15% in pre exercise forced expiratory volume in one second at any time point after exercise. This includes elevation of cortisol and cathecholamines in plasma. On the other hand, highly trained athletes exhibit a chronic mild hypercortisolism at baseline that maybe an adaptive change to chronic exercise. And, Consuming carbohydrate during prolonged strenuous exercise attenuates rises in stress hormones and appears to limit the degree of exercise-induced immune depression. Recent evidence suggests that antioxidant vitamin supplementation may also reduce exercise stress and impairment of leukocyte functions.
|
|
|
KEYWORD
|
|
|
Aerobic exercises, anaerobic exercises, immunological systems
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|