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首页> 外文期刊>Journal of Lasers in Medical Sciences >Effect of Low-Level Laser Therapy and Strength Training Protocol on Hand Grip by Dynamometry
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Effect of Low-Level Laser Therapy and Strength Training Protocol on Hand Grip by Dynamometry

机译：测力法低水平激光治疗和力量训练方案对手部握力的影响

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Introduction: The purpose of this study was to investigate the effect of low-level laser therapy (LLLT) – 660 nm and 904 nm - before grip strength protocol in healthy subjects. Methods: The study included 45 healthy volunteers with an average age of 22.7 (±1.4) years, subdivided into the following groups, control group: grip strength training associated with placebo LLLT; 660 nm group: LLLT (660 nm, 20 J/cm2, power of 30 mW, and beam area of 0.06 cm2, continuous, energy 1.2 J, and exposure time 40 seconds per point) before grip strength training and 904 nm group: LLLT (904 nm, 10 J/cm2, peak power of 70 W and 0.13 cm2 beam area, with pulsed beam 9.500 Hz and 30 seconds of exposure time per point and emitted energy 1.2 J) before grip strength training. The LLLT was timed to contact 10 points located in the region of the superficial and deep flexor muscles of the fingers, with a total energy of 12.0 J per session. For the strength training protocol, the volunteer exercised their fingers with the dominant hand on a small table, elbow flexed at 90°, forearm in neutral, using a light extension handle. The Oxford protocol was performed during four weeks. The grip strength was assessed using a dynamometer (Jamar?). The data were evaluated by the analysis of variance (ANOVA) statistical method. Results: In the comparison of intragroup evaluation, only the 904 nm group showed a difference compared to the baseline assessment after 4 weeks (P & 0.05), in the final intergroup evaluation, a difference was observed in the comparison between the control and 904 nm groups. Conclusion: In conclusion, LLLT (904 nm) applied before resistance training was effective in gaining grip strength when compared to LLLT (660 nm) and isolated strength training after 4 weeks.
机译：简介：这项研究的目的是研究在健康受试者的握力协议之前进行660 nm和904 nm低水平激光治疗（LLLT）的效果。方法：该研究纳入了45名平均年龄为22.7（±1.4）岁的健康志愿者，分为以下几组，即对照组：与安慰剂LLLT相关的握力训练。 660 nm组：握力训练前的LLLT（660 nm，20 J / cm2，功率30 mW，光束面积0.06 cm2，连续，能量1.2 J，曝光时间每点40秒）和904 nm组：LLLT （904 nm，10 J / cm2，峰值功率为70 W，光束面积为0.13 cm2，脉冲光束为9.500 Hz，每个点的曝光时间为30秒，发射能量为1.2 J），然后进行握力训练。 LLLT定时接触手指浅表和深屈肌区域中的10个点，每节总能量为12.0J。在力量训练方案中，志愿者用占优势的手在小桌子上锻炼手指，肘部以90°弯曲，前臂处于中性，使用轻便的延伸手柄。牛津协议进行了四个星期。使用测力计（Jamar？）评估握力。数据通过方差分析（ANOVA）统计方法进行评估。结果：在组内评估的比较中，只有904 nm组在4周后与基线评估相比有差异（P <0.05），在最终的组间评估中，对照组和904之间的比较存在差异nm组。结论：总之，与4周后的LLLT（660 nm）和孤立的力量训练相比，在阻力训练之前应用LLLT（904 nm）可以有效提高握力。

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