Effects of low-level laser therapy on biceps braquialis muscle fatigue in young women
Higashi RH, Toma RL, Tucci HT, Pedroni CR, Ferreira PD, Baldini G, Aveiro MC, Borghi-Silva A, de Oliveira AS, Renno AC
Photomedicine and laser surgery · 37 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Funding not disclosed
Publication
- Published
- 2013-12-01 · Photomed Laser Surg · vol. 31 · issue 12 · pp. 586–594
- Publisher
- Mary Ann Liebert, Inc.
- Cited
- 50 citations · more than 92% of similar papers · 3.4× the field average
- Impact
- Top 10% most cited in its field
- References
- 40 works
- Access
- Paywalled
- Research areas
- Laser Applications in Dentistry and Medicine · Shoulder Injury and Treatment · Muscle Physiology and Disorders
- Keywords
- Biceps, Medicine, Muscular fatigue, Muscle fatigue, Placebo, Crossover study, Physical therapy, Blood lactate, Low level laser therapy, Muscle damage, Physical medicine and rehabilitation, Electromyography, Laser therapy, Blood pressure, Heart rate, Laser, Internal medicine
- MeSH
- muscle, skeletal, humans, lactic acid, electromyography, cross-over studies, muscle fatigue, female, young adult, low-level light therapy
10 authors
From BR
- Renan Hideki HigashiUniversidade Federal de São Paulo
- Renata Luri TomaUniversidade Federal de São Paulo
- Helga Tatiana TucciUniversidade Federal do ABC; Universidade Federal de São Paulo
- Cristiane Rodrigues PedroniFaculdade de Medicina de Marília; Universidade de Marília; Universidade Estadual Paulista (Unesp)
- Pryscilla Dieguez FerreiraUniversidade Federal de São Paulo
- Gabriel Sobrinho BaldiniUniversidade Federal de São Paulo
Abstract
Objective
This study aims to investigate the effects of low-level laser therapy (LLLT) on biceps brachi muscular fatigue in 20 young females.
Background data
Exhausting physical activity leads to muscular fatigue, which could decrease muscular strength, and may cause impairment in motor control and muscle pain. Several biochemical and biophysical resources have been studied in an attempt to accelerate the recovery of muscle fatigue. Among these, LLLT is emphasized.
Methods
Twenty subjects were randomized in one laser group and one placebo group in two sessions of a crossover design experimental procedure; the second session taking place within 7 days of the first. In the first session, subjects underwent a collection of surface electromyographic (SEMG) data of the biceps brachii muscle, followed by active or placebo LLLT at the same muscle, followed then by another EMG sample of biceps brachii. Blood samples were collected five times during the experimental procedure. Second session procedures were identical to the first, with exception of LLLT, which was the opposite of the first session. The fatigue protocol consisted of 60 sec of elbow flexion-extension movement performed with 75% of one maximum repetition. Blood lactate, EMG fatigue, and the number of elbow flexion-extension repetitions during the fatigue protocol were used to evaluate the effects of laser therapy (808 nm wavelength, 100 mW output power, power density of 35.7 W/cm(2), 70 sec each point and 7 J/point on eight points).
Results
No statistical differences were found for eletromyographic fatigue and blood lactate values between groups. Mean numbers of elbow flexion-extension repetitions were 22.6 ± 7.58 after placebo, and 25.1 ± 9.89 after active LLLT group, but these differences were not statistically significant (p=0.342).
Conclusions
LLLT had limited effects on delaying muscle fatigue in a young female sample, although a tendency was observed in the active laser group toward showing lower electromyography fatigue of biceps brachii muscle. No intergroup differences were found in the number of muscle contractions and lactate concentration.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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