LATIHAN FISIK

DALAM OLAH RAGA  DAN KESEHATAN

TERHADAP KEMUNGKINAN TERJADINYA INFEKSI

AR.Shadiqin

Abstract: After prolong exercise the number of lymphocytes in the blood is reduced, and the function of NK cells is suppressed. During this time of immunodepression, often referred to as ‘the open window’, the host may be more susceptible to micro-organisms by passing the first line of defense. Clinical observations are regarding an increased risk of infections in top athletes. However, in moderate exercise the immune system will often be temporarily enhanced and this will protect these individuals from infections. Research into exercise immunology has been stimulated by: (a) report of increased frequency of upper respiratory tract infection (urti) among athletes; (b) the finding that in addition to physical exercise several other physical stressors induce changes in the celular immune system; and (c) the possibility that increased levels of some neuroendocrine factors (e.g catecholamines and growth hormone) may modulate the immune responses.

Key words: physical stressor, intensity, immune system

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