Abstract
The aim of this study is to assess the effect of photobiomodulation therapy (PBMT) on functional performance concerning strength, fatigue, and functional capacity in healthy individuals. This systematic review with meta-analysis involved searches on data platforms and active searches of randomized clinical trials, focusing on PBMT as the sole intervention. Primary outcomes assessed included strength, fatigue, and functional capacity. Three reviewers screened studies by title and abstract using Rayyan, and data were extracted using a specific form. Bias risk was assessed using RoB2, and confidence in the evidence was evaluated using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE). The RevMan was used for meta-analysis. Sixteen studies were included, totaling 340 individuals (183 males and 157 women). Most articles presented a low risk of bias. Variability was observed in device types and application domains, including wavelengths (655–905 nm), power (10–200 nW), energy (0.6–30 J per point), and time (30–100 s per point). PBMT improved fatigue recovery (mean difference: 5.87; 95% CI 3.83, 7.91). There was no enhancement in strength (peak torque: mean difference 12.40; 95% CI -5.55, 30.55; one-repetition maximum test: mean difference 39.97, 95% CI -2.44, 82.38; isometric and isokinetic strength: mean difference 2.77, 95% CI -14.90, 20.44) nor improvement in short-term (mean difference 0.67, 95% CI -0.58, 1.91) and long-term (mean difference 18.44, 95% CI -55.65, 92.54) functional capacity. PBMT may aid in favoring fatigue recovery in healthy individuals; however, there's no evidence to support PBMT enhancing strength or improving functional capacity.
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Significant involvement in study conceptualization and data collection: Lívia Oliveira Bezerra, Luiza Eduarda Silva de Macedo, Maria Letícia Araújo da Silva, Joyce Maria Pereira de Oliveira. Data analysis/interpretation: Lívia Oliveira Bezerra, Luiza Eduarda Silva de Macedo, Maria Letícia Araújo da Silva, Joyce Maria Pereira de Oliveira, Guilherme Pertinni de Morais Gouveia, Palloma Rodrigues de Andrade, Maria Thereza Albuquerque Barbosa Cabral Micussi. Involvement in manuscript drafting or revision: Lívia Oliveira Bezerra, Luiza Eduarda Silva de Macedo, Maria Letícia Araújo da Silva, Joyce Maria Pereira de Oliveira, Guilherme Pertinni de Morais Gouveia, Palloma Rodrigues de Andrade, Maria Thereza Albuquerque Barbosa Cabral Micussi. Approval of the final manuscript version for publication: Guilherme Pertinni de Morais Gouveia, Palloma Rodrigues de Andrade, Maria Thereza Albuquerque Barbosa Cabral Micussi.
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Bezerra, L.O., de Macedo, L.E.S., da Silva, M.L.A. et al. Effects of photobiomodulation therapy on the functional performance of healthy individuals: a systematic review with meta-analysis. Lasers Med Sci 39, 17 (2024). https://doi.org/10.1007/s10103-023-03956-2
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DOI: https://doi.org/10.1007/s10103-023-03956-2