Effects of static stretching and strengthening exercises on flexion relaxation ratio in patients with LBP: A randomized clinical trial |
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| Institution: | 1. Department of Physiotherapy, School of Rehabilitation Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran;2. Department of Physiotherapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran;3. Department of Physiotherapy, School of Primary & Allied Health Care, Monash University, Melbourne, Australia;1. Regis University, Health & Exercise Science Program, School of Physical Therapy, Denver, CO, 80221, USA;2. Washington State University, Department of Nutrition and Exercise Physiology, Elson S. Floyd College of Medicine, Spokane, WA 99202, USA;1. Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran;2. Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, Shiraz, Iran;3. Department of Epidemiology and Biostatistics, Faculty of Health, Shahrekord University of Medical Sciences, Shahrekord, Iran;4. Department of Pharmaceutical Care, Alzahra and Hejazi Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;5. Department of Computer Science and Engineering, Shiraz University, Shiraz, Iran;1. Universidade Federal de Santa Catarina, Centro de Desportos, Núcleo de Pesquisa em Cineantropometria e Desempenho Humano, Florianópolis, Santa Catarina, Brazil;2. Universidade Federal de Alagoas, Instituto de Educação Física e Esporte. Grupo de Pesquisa em Biodinâmica do Desempenho Humano e Saúde. Maceió, Alagoas, Brazil;1. Department of Health & Kinesiology, Lamar University, Beaumont, TX, USA;2. Department of Physical Therapy, UT Health San Antonio, San Antonio, TX, USA;3. Memorial Hermann Health Care System, Houston, TX, USA;4. Physical Therapy Department, Augustana University, Sioux Falls, SD, USA;1. Functional Biology and Health Sciences, Universidade de Vigo, Spain;2. Ciudad Real, Spain;1. Department of Health Science, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil;2. Department of Applied Physiotherapy, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil;3. Department of Physiotherapy, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, BH, Brazil |
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| Abstract: | IntroductionStretching and strengthening exercises are commonly used to improve muscle shortness. Consequently, the aim of this trial was to compare the flexion-relaxation response (electromyography activities of shortened hamstring and back muscles) in chronic nonspecific LBP patients.MethodsIn this randomized controlled clinical trial, forty-five eligible patients were randomly categorized into three groups; static stretching (n = 15), strengthening exercise in lengthened hamstring position (n = 15) and control (n = 15). All groups received conventional physical therapy for LBP and the two intervention groups received special exercise programs as well. Each group performed three treatment sessions for a week, a total of 12 sessions. The flexion-relaxation ratio (FRR) for knee and back muscles were assessed as the primary outcome measure. Pain and functional disability for participants were also assessed.ResultsThe results indicated non-significant differences between the three groups regarding the changes of FRR (mean between-group differences ranged over 0.69 to 39.1; p > 0.05), pain and disability (mean between-group differences ranged over 0.15 to 5.96; p > 0.05). Within-group analysis for each group, revealed statistically significant improvement in the patients' score of either pain (mean within-group differences ranged over ?27.20 to ?35.76; p < 0.001) or disability (mean within-group differences ranged over ?16.17 to 24.95; p < 0.001) as secondary outcomes. In other words, the scores of pain and disability decreased in all treatment groups as compared to the baseline.ConclusionNeither static stretching nor strengthening exercises in lengthened hamstring position affected FRR more than the control group. |
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| Keywords: | Low back pain Electromyography Hamstring Flexion relaxation ratio |
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