ABSTRACT
Aim: To compare the effects of Pilates with and without accessories on biochemical markers, pain intensity, functional disability and muscle strength in postmenopausal women with nonspecific chronic low back pain. Materials & methods: Twenty-two participants were randomized to a group of Pilates without (PG; n = 11) and with elastic resistance (PAG; n = 11) for 8 weeks, twice a week. We analyzed IGF-1, IGF-binding protein-3 (IGFBP-3), cortisol, creatine kinase, pain intensity, functional disability, abdominal and back strengths. Results: Both groups had lower pain intensity and functional disability and increased lumbar strength postinterventions. PAG exhibited an increase in IGF-1/IGFBP-3 ratio and reduction in creatine kinase compared with PG. Conclusion: Both interventions were effective in the treatment of low back pain. However, PAG presented better responses than PG. Clinical Trial Registration: Brazilian Clinical Trials Registry: ReBEC (RBR-9jwcykc), www.ensaiosclinicos.gov.br/rg/RBR-9jwcykc.
Pilates is a type of exercise that has been practiced, both in health promotion and rehabilitation, including low back pain (LBP) treatment. LBP prevails in women after menopause when compared with men. Thus, we submitted postmenopausal women with chronic LBP to two groups, one that practiced Pilates with elastic resistance and the other without these accessories. These elastic bands of progressive tension increase the effort of the exercise performed. We analyzed biochemical markers, pain intensity, functional disability and muscle strength. After 8 weeks, both groups had lower pain intensity and functional disability and increased lumbar strength. Furthermore, the group that used elastic resistance during the training showed increase in IGF-1/IGFBP-3 ratio and reduction in creatine kinase compared with the other group.
Subject(s)
Exercise Movement Techniques , Low Back Pain , Exercise Therapy , Female , Humans , Low Back Pain/therapy , Lumbosacral Region , Pain Measurement , PostmenopauseABSTRACT
INTRODUCTION: The purpose of this study was to examine the acute effect of different rest intervals between multiple sets of the 45° angled leg press exercise (LP45) on surface electromyographic (SEMG) spectral and amplitude indices of fatigue. METHODS: Fifteen recreationally trained females performed three protocols in a randomized crossover design; each consisting of four sets of 10 repetitions with 1 (P1), 3 (P3), or 5 (P5) minute rest intervals between sets. Each set was performed with 70% of the LP45 ten-repetition maximum load. The SEMG data for biceps femoris (BF), vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF) muscles was then evaluated. RESULTS: The SEMG amplitude change in the time coefficient (CRMS) and spectral fatigue index (Cf5) indicated higher levels of fatigue for all muscles evaluated during the P3 protocol versus the P1 and P5 protocols (p ≤ 0.05), respectively. The RF and VL muscles showed greater fatigue levels by the second and third sets; whereas, greater fatigue was shown in the VM and BF muscles by the fourth set (p ≤ 0.05). CONCLUSIONS: A three-minute rest interval between sets might represent a neuromuscular window between a fatigue stated and fully recovered state in the context of neural activation. Moreover, a three minute rest interval between sets might allow for consistent recruitment of high threshold motor units over multiple sets, and thus promote a more effective stimulus for strength gains.
Subject(s)
Hamstring Muscles/physiology , Muscle Fatigue/physiology , Quadriceps Muscle/physiology , Rest/physiology , Weight Lifting/physiology , Adult , Cross-Over Studies , Electromyography , Female , Humans , Time Factors , Young AdultABSTRACT
RESUMO JUSTIFICATIVA E OBJETIVOS: A dor lombar é um dos sintomas musculoesqueléticos mais comuns nas sociedades industrializadas, de acordo a Organização Mundial de Saúde. O objetivo do estudo foi investigar a prevalência de dor lombar em professores que atuam na atividade de musculação em academias de ginástica no município do Rio de Janeiro e verificar as correlações entre idade, tempo de trabalho, horas de trabalho e intensidade da dor lombar. MÉTODOS: Foi aplicado o Questionário adaptado do Quebec Pain Disability Scale em 50 professores de Educação Física de ambos os gêneros (idade=31,86±6,86 anos) que trabalham na musculação em academias de ginástica, com jornada semanal mínima de 12h de trabalho, e ao menos três anos de atuação prática na área. O trabalho foi caracterizado como um estudo descritivo, de corte transversal do tipo Survey. RESULTADOS: Dos 50 professores entrevistados, 62% alegaram não sentir qualquer tipo de desconforto na região lombar, enquanto apenas 38% afirmaram sentir algum tipo de dor. Desses, 20% alegaram que a manifestação da dor é diária, 6% semanal e 12% relataram que as dores são mensais. Sobre a intensidade da dor em seu pior momento, 14% afirmaram ser suave, 20% moderada e apenas 6% relataram dores intensas. Observou-se correlação positiva e significativa (p<0,05) entre a idade e tempo de trabalho e entre tempo de trabalho e intensidade da dor lombar. CONCLUSÃO: A prevalência de dor lombar não foi alta nos profissionais pesquisados da amostra. Os resultados apontam que os indivíduos com mais idade e que possuem mais tempo de trabalho são os que apresentam dor lombar em níveis mais elevados.
ABSTRACT BACKGROUND AND OBJECTIVES: Low back pain is one of the most common musculoskeletal symptoms in industrialized societies, according to the World Health Organization. This study aimed at investigating the prevalence of low back pain among bodybuilding professors of fitness centers of the city of Rio de Janeiro and at observing correlations between age, working time, working hours and low back pain intensity. METHODS: The adapted questionnaire of the Quebec Pain Disability Scale was applied to 50 physical education professors of both genders (age = 31.86±6.86 years) working with bodybuilding in fitness centers, with minimum weekly working hours of 12h, and at least three years acting in the area. This was a survey-type descriptive cross-sectional study. RESULTS: From 50 interviewed professors, 62% have stated not feeling any type of lumbar discomfort, while just 38% have stated feeling some type of pain. From these, 20% have stated feeling daily pain, 6% weekly and 12% have reported monthly pain. About pain intensity in its worst moment, 14% have stated it is mild, 20% moderate and just 6% have reported severe pain. There has been positive and significant correlation (p<0.05) between age and working time and between working time and low back pain intensity. CONCLUSION: Low back pain prevalence was not high among interviewed professionals. Results show that older individuals working for a longer time are those with more severe low back pain.