Effects of low-level laser therapy (LLLT) in the development of exercise-induced skeletal muscle fatigue and changes in biochemical markers related to postexercise recovery
Leal Junior EC, Lopes-Martins RA, Lopes-Martins RA, Frigo L, De Marchi T, Rossi RP, de Godoi V, Tomazoni SS, Silva DP, Basso M, Filho PL, de Valls Corsetti F, Iversen VV, Bjordal JM
The Journal of orthopaedic and sports physical therapy · 136 citas
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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
- 2010-04-12 · J Orthop Sports Phys Ther · vol. 40 · número 8 · págs. 524–532
- Editorial
- American Physical Therapy Association
- Citado
- 202 citas · más que el 98% de estudios similares · 8.2× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 41 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, exercise fatigue, post-exercise recovery, biceps brachii, blood lactate, creatine kinase, C-reactive protein, oxidative stress, inflammation, muscular endurance, volleyball players
- MeSH
- arm, muscle, skeletal, humans, lactic acid, creatine kinase, c-reactive protein, exercise test, cross-over studies, double-blind method, recovery of function, muscle fatigue, adolescent, male, physical exertion, young adult, biomarkers, low-level light therapy
13 autores
- Ernesto César Pinto Leal‐Junior🇧🇷 · autor de correspondenciaUniversidade Nove de Julho
- Rodrigo Álvaro Brandão Lopes‐Martins
- Lúcio Frigo
- Thiago De Marchi
- Rafael Paolo Rossi
- Vanessa de Godoi
- Shaiane Silva Tomazoni
- Daniela Perin da Silva
- Maira Basso
- Pedro Lotti Filho
- Francisco de Valls Corsetti
- Vegard Vereide Iversen
- Jan Magnus Bjordal
Resumen
El texto original del estudio, en el idioma en que se publicó.
Study design
Randomized crossover double-blinded placebo-controlled trial.
Objective
To investigate if low-level laser therapy (LLLT) can affect biceps muscle performance, fatigue development, and biochemical markers of postexercise recovery.
Background
Cell and animal studies have suggested that LLLT can reduce oxidative stress and inflammatory responses in muscle tissue. But it remains uncertain whether these findings can translate into humans in sport and exercise situations.
Methods
Nine healthy male volleyball players participated in the study. They received either active LLLT (cluster probe with 5 laser diodes; lambda = 810 nm; 200 mW power output; 30 seconds of irradiation, applied in 2 locations over the biceps of the nondominant arm; 60 J of total energy) or placebo LLLT using an identical cluster probe. The intervention or placebo were applied 3 minutes before the performance of exercise. All subjects performed voluntary elbow flexion repetitions with a workload of 75% of their maximal voluntary contraction force until exhaustion.
Results
Active LLLT increased the number of repetitions by 14.5% (mean +/- SD, 39.6 +/- 4.3 versus 34.6 +/- 5.6; P = .037) and the elapsed time before exhaustion by 8.0% (P = .034), when compared to the placebo treatment. The biochemical markers also indicated that recovery may be positively affected by LLLT, as indicated by postexercise blood lactate levels (P<.01), creatine kinase activity (P = .017), and C-reactive protein levels (P = .047), showing a faster recovery with LLLT application prior to the exercise.
Conclusion
We conclude that pre-exercise irradiation of the biceps with an LLLT dose of 6 J per application location, applied in 2 locations, increased endurance for repeated elbow flexion against resistance and decreased postexercise levels of blood lactate, creatine kinase, and C-reactiveprotein.
Level of evidence
Performance enhancement, level 1b.
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