Abstract
Photobiomodulation therapy (PBM) is often used to treat musculoskeletal disorders such as chronic non-specific low back pain (NSCLBP) as it can have positive effects on biomarkers—creatine kinase (CK) and serum cortisol levels—related to stress caused by physical exercise, such as deep water running (DWR) or by pain. The aim of this study was to evaluate the effects of the combination of PBM and aquatic exercise (DWR) on the intensity of pain, disability, 6-min walk test adapted (6WTA), and on cortisol and creatine kinase (CK) levels in a population with NSCLBP. The participants were allocated into three groups: TGPBM (Photobiomodulation and Training Group), TGPLA (Placebo Photobiomodulation and Training Group), and the GPBM (Photobiomodulation Group). Information regarding anthropometric data, blood pressure, and heart rate were collected, and the questionnaires were applied: IPAQ-Short Form, Oswestry Disability Index, and the Visual Analog Scale for Pain. The submaximal exercise test (6WTA) was performed. Blood was collected for analysis of cortisol and CK levels. The training sessions were performed twice a week, for 4 weeks. In the intragroup comparisons, there were statistically significant changes in the TGPBM and GPBM groups in the outcomes pain intensity, disability (reductions in both groups), and in cortisol (increased in the TGPBM and reduced in the GPBM); in the TGPLA group, there was a statistically significant reduction only in the outcome of pain intensity. In the intergroup comparison, in the comparison between TGPBM and TGPLA, there was a statistically significant difference in the level of cortisol, as well as in the comparison between TGPBM and GPBM, in which there was a statistically significant difference for this same outcome (cortisol) and for the 6WTA outcome. The effects of the combination of PBM and aquatic exercise have positive effects on reducing pain intensity, disability, and cortisol levels, but its effects on other variables (6WTA and CK) are too small to be considered significant. Trial registration number: NCT03465228—April 3, 2019; retrospectively registered (ClinicalTrials.gov).
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Daniele Mayumi Kurata Nardin (DMKN): Contributed to the design and development of the study, data collection, and analysis and to the preparation of the study and its development, acquisition and analysis of data, critical review of the final content, and approval of the final version.
Marieli Ramos Stocco (MRS): Contributed to the design and development of the study, data collection, and analysis and to the preparation of the study and its development, acquisition and analysis of data, critical review of the final content, and approval of the final version.
Fabiana Andrade Machado (FAM): Contributed to the elaboration of the study design and development, data collection, and analysis.
Raphael Gonçalves de Oliveira (RGO): Contributed to the design and development of the study and approved the final version.
Rodrigo Antonio Carvalho Andraus (RACA): Contributed to the elaboration of the study design and development and the processes for obtaining approval from the Research Ethics Committee involving human beings, data acquisition and analysis, critical review of the final content, and approval of the final version.
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Our study is a controlled, randomized clinical trial, previously registered at ClinicalTrials.gov (trial registration number: NCT03465228—retrospectively registered). In compliance with Resolution 466/12, this research was approved by the Research Ethics Committee of Universidade Norte do Paraná (UNOPAR), under number 2183951, and carried out in accordance with the Declaration of Helsinki.
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Nardin, D.M.K., Stocco, M.R., Aguiar, A.F. et al. Effects of photobiomodulation and deep water running in patients with chronic non-specific low back pain: a randomized controlled trial. Lasers Med Sci 37, 2135–2144 (2022). https://doi.org/10.1007/s10103-021-03443-6
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DOI: https://doi.org/10.1007/s10103-021-03443-6