Int J Sports Physiol Perform. 2021 Jul 1;16(7):1035-1042. doi: 10.1123/ijspp.2020-0264. Epub 2021 Mar 23.
To analyze the acute effect of photobiomodulation (PBM) on swimming critical velocity (CV).
A total of 15 male federated swimmers (20.9 [2.4] y old) participated in this study. Three sets of front crawl were performed at distances of 100, 200, and 400 m to determine the CV under 3 experimental conditions: PBM (420 J), placebo (PLA), and control (C) in this randomized, crossover, double-blind, and placebo-controlled study. One-way analysis of variance for repeated measurements was used for statistical analyses.
The results showed that the prior application of PBM did not have ergogenic effects on CV and front crawl swimming performance: CV (PBM = 1.15 [0.15]; PLA = 1.20 [0.25]; C = 1.15 [0.14] m·s-1), swim time (ST) 100 m (PBM = 65.5 [6.3]; PLA = 65.2 [5.6]; C = 66.0 [5.9] s), ST 200 m (PBM = 148.5 [17.9]; PLA = 149.4 [16.4]; C = 150.1 [17.9] s), and ST 400 m (PBM = 327.7 [38.2]; PLA = 321.6 [47.7]; C = 329.5 [41.2] s).
A PBM application prior to front crawl swimming test did not significantly modify the CV, ST, physiological factors of metabolic fatigue, perceptual, and front crawl stroke efficiency parameters in competition swimmers covering distances of 100, 200, and 400 m.
分析光生物调节（PBM）对游泳临界速度（CV）的急性影响。
共有 15 名男性联盟游泳运动员（20.9 [2.4] 岁）参加了这项研究。在这项随机、交叉、双盲、安慰剂对照研究中，在 3 种实验条件下（PBM[420J]、安慰剂[PLA]和对照[C]）进行了 3 组自由泳 100、200 和 400 米测试，以确定 CV。采用重复测量的单因素方差分析进行统计分析。
结果表明，PBM 的预先应用对 CV 和自由泳游泳表现没有产生增效作用：CV（PBM=1.15 [0.15]；PLA=1.20 [0.25]；C=1.15 [0.14] m·s-1），100 米游泳时间（ST）（PBM=65.5 [6.3]；PLA=65.2 [5.6]；C=66.0 [5.9] s），200 米 ST（PBM=148.5 [17.9]；PLA=149.4 [16.4]；C=150.1 [17.9] s）和 400 米 ST（PBM=327.7 [38.2]；PLA=321.6 [47.7]；C=329.5 [41.2] s）。
在进行 100、200 和 400 米自由泳测试之前，应用 PBM 不会显著改变 CV、ST、代谢疲劳的生理因素、知觉和自由泳划水效率参数。
