摘要
目的:探讨低水平激光疗法(LLLT)对力竭性运动疲劳后恢复的影响。方法:将16名健康大学生分为LLLT剂量0.06 J·cm-2(LLLT-1)、0.18 J·cm-2(LLLT-3)、0.3 J·cm-2(LLLT-5)和安慰剂(Placebo)4个组进行随机、双盲、安慰剂对照交叉试验。受试者在功率自行车上进行递增负荷运动直至力竭性疲劳,随即对受试者股直肌进行低水平激光照射300 s。检测力竭运动前,力竭后即刻、10 min、20 min,第1次Wingate测试(力竭运动后20 min)后即刻、5 min和30 min的血乳酸、血糖、心率、主观感觉等级和视觉模拟评分;并在第1次Wingate测试后40 min进行第2次Wingate测试。结果:(1)LLLT-1组心率在力竭运动后10 min(P<0.05)和第1次Wingate测试后即刻(P<0.01)显著低于同时间点的Placebo组,而LLLT-3和LLLT-5组分别在第1次Wingate测试后即刻和Wingate测试后5 min低于同时间点的Placebo组(P<0.01);(2)与Placebo组相比,LLLT-1(P<0.05)、LLLT-3(P<0.01)和LLLT-5(P<0.05)组受试者血乳酸在力竭运动后10 min显著降低,LLLT-5组血乳酸在第1次Wingate测试后30 min低于同时间点的Placebo组(P<0.05);LLLT-5组受试者的血糖在第1次Wingate测试后即刻显著高于Placebo组受试者(P<0.05);(3)与Placebo组相比,LLLT-3显著增加第1次Wingate测试的平均功率(P=0.048)、第2次Wingate测试后的平均功率(P=0.022)和峰值功率(P=0.006)。结论:力竭性疲劳后LLLT照射股直肌对机体疲劳恢复有积极作用,其中LLLT光照剂量0.18 J·cm-2促进疲劳恢复的效果最佳。
Objective To explore the effect of low-level laser therapy（LLLT）applied to the quadri-ceps muscle on the recovery of exhausting-cycling-exercise-induced fatigue. Methods According to arandomised, double-blind and crossover design, 16 healthy male students were randomly assigned to anLLLT-1, LLLT-3, LLLT-5 and a placebo group, and received LLLT for 300 s at the dosage of 0.06 J·cm^-2, 0.18 J·cm^-2, 0.3 J·cm^-2 and 0 to the bilateral rectus femoris after the exhausting-cycling-exer-cise-induced fatigue. The blood lactate（BL）, heart rate（HR）, rated perceived exertion（RPE）and visualanalogue scale（VAS）were assessed before the exercise, immediately after exercise, 10 and 20 min afterexercise, as well as immediately after the first Wingate（WG）test, 5 and 30 min after the WG test.Meanwhile, the second WG test was performed 40 min after the first WG test. Results The averageHR value of LLLT-1 group was significantly lower than the placebo group at 10 min after exercise（P〈0.05）and immediately after the WG test（P〈0.01）, while that of LLLT-3 and LLLT-5 groups was signifi-cantly lower than the placebo group immediately and 5 min after the WG test（P〈0.01）. Compared tothe placebo group, the average BL of LLLT-1, LLLT-3 and LLLT-5 groups was significantly lower 10 min after exercise（P〈0.05 for all）and that of LLLT-5 group was also significantly lower 30 min afterthe first WG test（P〈0.05）. However, the average blood glucose of LLLT-5 group was significantly high-er than the placebo group right after the first WG test（P〈0.05）. Moreover, significant increase was ob-served in the mean（P=0.002）and peak power（P=0.006）at the second WG test and the mean（P=0.048）power at the first WG test of LLLT-3 group, compared to the placebo group. Conclusion LLLT ap-plied to quadriceps muscles after exhausting exercise may enhance recovery, and LLLT at the dose of0.18 J·cm^-2 is of the best effect.
作者
李方晖
刘延莹
肖琳
黄思敏
陈玉婧
黄银祺
余绍宜
Li Fanghui;Liu Yanying;Xiao Lin;Huang Simin;Cheng Yujing;Huang Yinqi;Yu Shaoyi(School of Sport Sciences, Nanjing Normal University, Nanjing 210023, China;School of Physical Education and Health, Zhaoqing University, Zhaoqing 526016, China)
出处
《中国运动医学杂志》
CAS
CSCD
北大核心
2018年第5期391-399,共9页
Chinese Journal of Sports Medicine
基金
国家自然科学基金青年项目(31500961)
广东省省级科技计划项目(2014A020220015和2015A020219015)
广东省高等学校青年创新人才项目(2014KQNCX225)资助
关键词
低水平激光疗法
力竭运动
运动性疲劳
恢复
光生物调节作用
low-level laser therapy
exhausting exercise
exercise-induced fatigue
recovery
photo- biomodulation
