Effects of Infrared-LED Illumination Applied During High-Intensity Treadmill Training in Postmenopausal Women

Author(s)

Paolillo, Fernanda Rossi ^{[1, 2]} ; Milan, Juliana Cristina ^[3] ; Aniceto, Isabela Verzola ^[4] ; Barreto, Selva Guimaraes ^[5] ; Rebelatto, Jose Rubens ^[6] ; Borghi-Silva, Audrey ^[7] ; Parizotto, Nivaldo Antonio ^{[1, 3]} ; Kurachi, Cristina ^{[1, 2]} ; Bagnato, Vanderlei Salvador ^{[1, 2]}

Affiliation

^[1] Univ Fed Sao Carlos, Biotechnol Program, BR-13560 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo USP, Opt Grp, IFSC, BR-13560970 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Phys Therapy, Electrothermophototherapy Lab, BR-13560 Sao Carlos, SP - Brazil

^[4] Univ Fed Sao Carlos, Cardiol Sect, Sch Hlth Unit, BR-13560 Sao Carlos, SP - Brazil

^[5] Univ Fed Sao Carlos, Dept Phys Educ & Human Motr, BR-13560 Sao Carlos, SP - Brazil

^[6] Univ Fed Sao Carlos, Dept Phys Therapy, Lab Studies Human Aging Geriatr Phys Therapy, BR-13560 Sao Carlos, SP - Brazil

^[7] Univ Fed Sao Carlos, Dept Phys Therapy, Cardiopulm Physiotherapy Lab, BR-13560 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Photomedicine and Laser Surgery; v. 29, n. 9, p. 639-645, SEP 2011.
• Web of Science Citations: 20

Abstract

Background data: Technology and physical exercise can enhance physical performance during aging. Objective: The purpose of this study was to investigate the effects of infrared-light-emitting diode (LED) illumination (850 nm) applied during treadmill training. Materials and methods: 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. Results: 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 +/- 8W (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 +/- 15W (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. Conclusions: Infrared-LED illumination associated with treadmill training can improve muscle power and delay leg fatigue in postmenopausal women. (AU)

• FAPESP's process: 98/14270-8 - Center for Optical and Photonics Science
• Grantee: Vanderlei Salvador Bagnato
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC