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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Light-emitting diode therapy (LEDT) before matches prevents increase in creatine kinase with a light dose response in volleyball players

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Author(s):
Ferraresi, Cleber [1, 2, 3] ; dos Santos, Ricardo Vinicius [4] ; Marques, Guilherme [4] ; Zangrande, Marcelo [4] ; Leonaldo, Roberley [4] ; Hamblin, Michael R. [5, 6, 7] ; Bagnato, Vanderlei Salvador [1, 2] ; Parizotto, Nivaldo Antonio [1, 3]
Total Authors: 8
Affiliation:
[1] Univ Fed Sao Carlos, Postgraduat Program Biotechnol, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Opt Grp, Phys Inst Sao Carlos, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Phys Therapy, Lab Electrothermophototherapy, BR-13565905 Sao Carlos, SP - Brazil
[4] Sao Bernardo Volleyball Team, Sao Bernardo Do Campo, SP - Brazil
[5] Massachusetts Gen Hosp, Wellman Ctr Photomed, Boston, MA 02114 - USA
[6] Harvard Univ, Sch Med, Dept Dermatol, Boston, MA 02115 - USA
[7] MIT, Harvard Mit Div Hlth Sci & Technol, Cambridge, MA 02139 - USA
Total Affiliations: 7
Document type: Journal article
Source: Lasers in Medical Science; v. 30, n. 4, p. 1281-1287, MAY 2015.
Web of Science Citations: 20
Abstract

Low-level laser (light) therapy (LLLT) has been applied over skeletal muscles before intense exercise (muscular pre-conditioning) in order to reduce fatigue and muscle damage (measured by creatine kinase, CK) in clinical trials. However, previous exercise protocols do not exactly simulate the real muscle demand required in sports. For this reason, the aim of this randomized and double-blind placebo-controlled trial was to investigate whether light-emitting diode therapy (LEDT) applied over the quadriceps femoris muscles, hamstrings, and triceps surae of volleyball players before official matches could prevent muscle damage (CK) with a dose response, establishing a therapeutic window. A professional male volleyball team (12 athletes) was enrolled in this study, and LEDT was applied before 4 matches during a national championship. LEDT used an array of 200 light-emitting diodes (LEDs) arranged in 25 clusters of 4 infrared LEDs (850 +/- 20 nm; 130 mW) and 25 clusters of 4 red LEDs (630 +/- 10 nm; 80 mW). Athletes were randomized to receive one of four different total doses over each muscle group in a double-blind protocol: 105 J (20 s), 210 J (40 s), 315 J (60 s), and placebo (no light for 30 s). CK in blood was assessed 1 h before and 24 h after each match. LEDT at 210 J avoided significant increases in CK (+10 %; P = 0.993) as well as 315 J (+31 %, P = 0.407). Placebo (0 J) allowed a significant increase in CK (+53 %; P = 0.012) as well as LEDT at 105 J (+59 %; P = 0.001). LEDT prevented significant increases of CK in blood in athletes when applied before official matches with a light dose response of 210-315 J, suggesting athletes might consider applying LEDT before competition. (AU)

FAPESP's process: 10/07194-7 - Use of low-level laser and light-emitting diode therapy to increase muscle performance: from in vitro and experimental studies to clinical applications
Grantee:Cleber Ferraresi
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 12/05919-0 - Effects of low level laser therapy on modulation of the transcriptome, immunohistochemistry of muscle tissue and physical performance of young men undergoing physical strength training
Grantee:Cleber Ferraresi
Support type: Scholarships abroad - Research Internship - Doctorate