Effects of pre- or post-exercise low-level laser therapy (830 nm) on skeletal muscle fatigue and biochemical markers of recovery in humans: double-blind placebo-controlled trial
Dos Reis FA, da Silva BA, Laraia EM, de Melo RM, Silva PH, Leal-Junior EC, de Carvalho Pde T
Photomedicine and laser surgery · 57 citas
Etiquetas de revisión
Financiación no declaradaDatos neutrales que nuestra revisión registró sobre cómo se hizo este estudio. Describen el método, nunca si nos gusta el resultado.
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2014-01-23 · Photomed Laser Surg · vol. 32 · número 2 · págs. 106–112
- Editorial
- Mary Ann Liebert, Inc.
- Citado
- 79 citas · más que el 97% de estudios similares · 6.3× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 32 trabajos
- Acceso
- De pago
- Áreas de investigación
- Laser Applications in Dentistry and Medicine · Exercise and Physiological Responses · Sports Performance and Training
- Palabras clave
- low-level laser therapy, skeletal muscle fatigue, quadriceps, serum lactate, creatine kinase, post-exercise recovery, leg extension, soccer players, muscle performance
- MeSH
- humans, lactic acid, creatinine, exercise, double-blind method, muscle fatigue, adolescent, adult, male, quadriceps muscle, young adult, low-level light therapy
7 autores
- Filipe Abdalla dos Reis🇧🇷 · autor de correspondenciaUniversidade Federal de Mato Grosso do Sul; Anhanguera-Uniderp University
- Baldomero Antônio Kato da Silva🇧🇷Universidade Federal do Piauí
- Érica Martinho Salvador Laraia🇧🇷Anhanguera-Uniderp University
- Rhaiza Marques de Melo🇧🇷Anhanguera-Uniderp University
- Patrícia Henrique Silva🇧🇷Anhanguera-Uniderp University
- Ernesto César Pinto Leal‐Junior🇧🇷Universidade Nove de Julho
- Paulo de Tarso Camillo de Carvalho🇧🇷Universidade Nove de Julho
Resumen
El texto original del estudio, en el idioma en que se publicó.
Objectives
The purpose of this study was to investigate the effect of low-level laser therapy (LLLT) before and after exercise on quadriceps muscle performance, and to evaluate the changes in serum lactate and creatine kinase (CK) levels.
Methods
The study was randomized, double blind, and placebo controlled.
Patients
A sample of 27 healthy volunteers (male soccer players) were divided into three groups: placebo, pre-fatigue laser, and post-fatigue laser. The experiment was performed in two sessions, with a 1 week interval between them. Subjects performed two sessions of stretching followed by blood collection (measurement of lactate and CK) at baseline and after fatigue of the quadriceps by leg extension. LLLT was applied to the femoral quadriceps muscle using an infrared laser device (830 nm), 0.0028 cm(2) beam area, six 60 mW diodes, energy of 0.6 J per diode (total energy to each limb 25.2 J (50.4 J total), energy density 214.28 J/cm(2), 21.42 W/cm(2) power density, 70 sec per leg. We measured the time to fatigue and number and maximum load (RM) of repetitions tolerated. Number of repetitions and time until fatigue were primary outcomes, secondary outcomes included serum lactate levels (measured before and 5, 10, and 15 min after exercise), and CK levels (measured before and 5 min after exercise).
Results
The number of repetitions (p=0.8965), RM (p=0.9915), and duration of fatigue (p=0.8424) were similar among the groups. Post-fatigue laser treatment significantly decreased the serum lactate concentration relative to placebo treatment (p<0.01) and also within the group over time (after 5 min vs. after 10 and 15 min, p<0.05 both). The CK level was lower in the post-fatigue laser group (p<0.01).
Conclusions
Laser application either before or after fatigue reduced the post-fatigue concentrations of serum lactate and CK. The results were more pronounced in the post-fatigue laser group.
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