Effect of 808 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in elderly women
Toma RL, Tucci HT, Antunes HK, Pedroni CR, de Oliveira AS, Buck I, Ferreira PD, Vassão PG, Renno AC
Lasers in medical science · 54 citas
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 independiente
- Gobierno
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Según 1 financiador declarado.
Publicación
- Publicado
- 2013-01-07 · Lasers Med Sci · vol. 28 · número 5 · págs. 1375–1382
- Editorial
- Springer Science+Business Media
- Citado
- 78 citas · más que el 97% de estudios similares · 5.9× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 39 trabajos
- Acceso
- Acceso abierto (copia en repositorio) · OTHER-OA
- Áreas de investigación
- Laser Applications in Dentistry and Medicine · Exercise and Physiological Responses · Effects of Vibration on Health
- Palabras clave
- low-level laser therapy, 808 nm, skeletal muscle fatigue, exercise fatigue, older women, aging, rectus femoris, surface electromyography, median frequency, knee flexion and extension, fatigue protocol, musculoskeletal function
- MeSH
- muscle, skeletal, humans, electromyography, exercise, cross-over studies, double-blind method, muscle fatigue, aged, middle aged, female, low-level light therapy
9 autores
- Renata Luri Toma🇧🇷 · autor de correspondenciaUniversidade Federal de São Paulo
- Helga Tatiana Tucci🇧🇷Universidade Federal de São Paulo
- Hanna Karen Moreira Antunes🇧🇷Universidade Federal de São Paulo
- Cristiane Rodrigues Pedroni🇧🇷Universidade Estadual Paulista (Unesp)
- Anamaria Siriani de Oliveira🇧🇷Universidade de São Paulo
- Isabela Buck🇧🇷Universidade Federal de São Paulo
- Pryscilla Dieguez Ferreira🇧🇷Universidade Federal de São Paulo
- Patrícia Gabrielli Vassão🇧🇷Universidade Federal de São Paulo
- Ana Cláudia Muniz Rennó🇧🇷Universidade Federal de São Paulo
Resumen
El texto original del estudio, en el idioma en que se publicó.
Aging process involves several structural changes in muscle tissue which lead to decrease in musculoskeletal function. One of the most common physiological modifications is the increase in fatigability in elderly people, which leads to inability to maintain strength and motor control. In this context, low-level laser therapy (LLLT) has demonstrated positive results in reducing fatigue during physical exercise. Thus, this study aimed to investigate the effects of LLLT on skeletal muscle fatigue in elderly women. Twenty-four subjects divided in two groups entered a crossover randomized triple-blinded placebo-controlled trial. Active LLLT (808 nm wavelength, 100 mW, energy 7 J) or an identical placebo LLLT was delivered on the rectus femoris muscle immediately before a fatigue protocol. Subjects performed a fatigue protocol which consisted of voluntary isotonic contractions of knee flexion-extension performed with a load corresponding to 75 % of 1-MR (Maximum Repetition) during 60 s. Surface electromyography (SEMG) signals were recorded from rectus femoris muscle of dominant lower limb to evaluate peripheral fatigability using median frequency analysis of SEMG signal. The number of repetitions of flexion-extension during fatigue protocol was also compared between groups. The values of median frequency were used to calculate the slope coefficient. The results showed no difference in the slope comparing placebo LLLT and active LLLT groups (p = 0.293). However, a significant difference was observed in the number of repetitions between groups, after active LLLT, subjects demonstrated significantly higher number of repetitions (p = 0.047). In this study, LLLT was efficient in increasing the mean number of repetitions during knee flexion-extension exercise, although results have not shown delay electromyographic fatigue.
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