Immune Alterations, Lipid Peroxidation, and Muscle Damage Following a Hill Race

肌酸激酶 脂质过氧化 内科学 促炎细胞因子 内分泌学 氧化应激 急性期蛋白 免疫系统 炎症 医学 肌肉损伤 白细胞介素6 化学 免疫学
作者
Richard J. Simpson,Martin Wilson,James R. Black,James A. Ross,Greg Whyte,Keith Guy,Geraint Florida-James
出处
期刊:Canadian Journal of Applied Physiology-revue Canadienne De Physiologie Appliquee [Canadian Science Publishing]
卷期号:30 (2): 196-211 被引量:18
标识
DOI:10.1139/h05-115
摘要

Hill races usually include large downhill running sections, which can induce significant degrees of muscle damage in a field setting. This study examined the link between muscle damage, oxidative stress, and immune perturbations following a 7-km mountainous hill race with 457 m of ascent and 457 m of descent. Venous blood samples were taken from 7 club level runners before, immediately after, and 48 hrs postrace. Samples were analysed for total and differential leukocyte counts, markers of muscle damage (CK), lipid peroxidation (MDA), and acute phase proteins (CRP; fibrinogen; α-1-ACT). The total antioxidant status (TEAC) and plasma levels of the proinflammatory cytokines IL-6, IL-8, and TNF-α were also determined. Subjective pain reports, and plasma activities of CK, MDA, and circulatory monocytes reached peak values at 48 hrs postrace (p < 0.05). TEAC and the cytokine IL-8 increased immediately after the race (p < 0.05). Plasma TNF-α remained unchanged (p > 0.05). Despite the reports of muscle damage and soreness, no evidence of an acute phase response was observed (p > 0.05), which may be explained by the failure of the race to induce a plasma TNF-α response. Future studies should examine the link between muscle damage, oxidative stress, and the acute phase response following hill races of longer duration with larger eccentric components. Key words: acute phase response, cytokines, antioxidant capacity, creatine kinase, field study
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