连续3d大负荷军事训练对武警战士淋巴细胞亚群的影响

Effects of three consecutive days of high load military training on lymphocyte subsets in soldiers of Chinese Armed Police Forces

目的观察长时间大负荷军事训练对武警战士淋巴细胞亚群的影响,为科学合理地制定训练计划提供依据。方法 23名武警战士参加为期3 d的军事训练,分别测定训练前(第1天晨)、中(第2天晨)、后(第4天晨)淋巴细胞亚群、血浆睾酮、皮质醇的变化并统计上呼吸道感染发病率。结果与训练前比较,训练中CD3+T显著升高(P<0.01),其他指标均无显著性变化(均为P>0.05),上呼吸道感染发病率为17.4%;训练后CD3+T(P<0.01)、CD4+T(P<0.01)、CD8+T(P<0.01)、CD4+/CD8+比值(P<0.05)、CD16+T(P<0.01)和血浆睾酮(P<0.01)显著降低,血浆皮质醇显著升高(P<0.01),上呼吸道感染发病率为65.2%。结论第1天训练负荷较为合理,连续3 d训练后,机体出现明显的免疫抑制,其机制之一可能与运动性低血睾酮与高皮质醇血症有关,应科学合理制定训练计划。

Objective To observe the effect of prolonged high load military training on lymphocyte subsets in soldiers of Chinese Armed Police Forces and to provide data for scientific training protocols.Methods Twenty-three soldiers participated in three-day military training,whose lymphocyte subsets,plasma testosterone,cortisol and upper respiratory tract infection symptoms were determined before training（the first morning）,during training（the second morning） and after training（the fourth morning） respectively.Results Compared with pre-training,CD3＋T increased significantly（P0.01）while other indexes did not change statistically（all P0.05）.The incidence of upper respiratory tract infection was 17.4% during training.CD3＋T（P0.01）,CD4＋T（P0.01）,CD8＋T（P0.01）,CD4＋/CD8＋ ratio（P0.05）,CD16＋T（P0.01） and plasma testosterone（P0.01） decreased significantly while plasma cortisol rose notably（P0.01） and the incidence of upper respiratory tract infection was 65.2% after training.Conclusions The training load on the first day was adequate and apparent immunosuppression appeared after three-day training,which is related to exercise-induced low blood testosterone and high cortisol.