Paolillo Fernanda Rossi, Milan Juliana Cristina, Aniceto Isabela Verzola, Barreto Selva Guimarães, Rebelatto José Rubens, Borghi-Silva Audrey, Parizotto Nivaldo Antonio, Kurachi Cristina, Bagnato Vanderlei Salvador
Optics Group from Instituto de Física de São Carlos, University of São Paulo, São Paulo, Brazil.
Photomed Laser Surg. 2011 Sep;29(9):639-45. doi: 10.1089/pho.2010.2961. Epub 2011 Jul 12.
Technology and physical exercise can enhance physical performance during aging.
The purpose of this study was to investigate the effects of infrared-light-emitting diode (LED) illumination (850 nm) applied during treadmill training.
Twenty postmenopausal women participated in this study. They were randomly divided into two groups. The LED group performed treadmill training associated with infrared-LED illumination (n=10) and the control group performed only treadmill training (n=10). The training was performed during 3 months, twice a week during 30 min at intensities between 85 and 90% of maximal heart rate. The irradiation parameters were 31 mW/cm(2), treatment time 30 min, 14,400 J of total energy and 55.8 J/cm(2) of fluence. Physiological, biomechanical, and body composition parameters were measured at the baseline and after 3 months.
Both groups improved the time of tolerance limit (Tlim) (p<0.05) during submaximal constant-speed testing. The peak torque did not differ between groups. However, the results showed significantly higher values of power [from 56±10 to 73±8 W (p=0.002)] and total work [from 1,537±295 to 1,760±262 J (p=0.006)] for the LED group when compared to the control group [power: from 58±14 to 60±15 W (p≥0.05) and total work: from 1,504±404 to 1,622±418 J (p≥0.05)]. The fatigue significantly increased for the control group [from 51±6 to 58±5 % (p=0.04)], but not for the LED group [from 60±10 to 60±4 % (p≥0.05)]. No significant differences in body composition were observed for either group.
Infrared-LED illumination associated with treadmill training can improve muscle power and delay leg fatigue in postmenopausal women.
技术和体育锻炼可在衰老过程中提高身体机能。
本研究旨在探讨在跑步机训练期间应用红外发光二极管（LED）照明（850纳米）的效果。
20名绝经后女性参与了本研究。她们被随机分为两组。LED组进行与红外LED照明相关的跑步机训练（n = 10），对照组仅进行跑步机训练（n = 10）。训练持续3个月，每周两次，每次30分钟，强度为最大心率的85%至90%。照射参数为31毫瓦/平方厘米，治疗时间30分钟，总能量14400焦耳，通量55.8焦耳/平方厘米。在基线和3个月后测量生理、生物力学和身体成分参数。
在次最大恒定速度测试期间，两组的耐受极限时间（Tlim）均有所改善（p < 0.05）。两组之间的峰值扭矩没有差异。然而，结果显示，与对照组相比，LED组的功率[从56±10瓦增加到73±8瓦（p = 0.002）]和总功[从1537±295焦耳增加到1760±262焦耳（p = 0.006）]显著更高[对照组功率：从58±14瓦增加到60±15瓦（p≥0.05），总功：从1504±404焦耳增加到1622±418焦耳（p≥0.05）]。对照组的疲劳显著增加[从51±6%增加到58±5%（p = 0.04）]，而LED组没有[从60±10%增加到60±4%（p≥0.05）]。两组在身体成分方面均未观察到显著差异。
与跑步机训练相关的红外LED照明可提高绝经后女性的肌肉力量并延缓腿部疲劳。
