ABSTRACT
BACKGROUND: Neuromuscular electrical stimulation (NMES) with kiloHertz currents (kHz) is a resource used in rehabilitation for producing muscle contractions with functional objectives, resulting from the optimization of the performance of aspects of muscle function (AOMF). However, parameters such as inadequate frequency, phase duration, amplitude, and therapy time may limit the effectiveness of NMES by the absence of adequate stimuli to generate positive adaptations in the AOMF. This study aimed to present an overview of the effectiveness and dosimetry of NMES by kHz on AOMF, such as torque and hypertrophy, in healthy people. METHODS: The study was outlined as a scoping review. From the search, 3892 studies were found of which were incorporated into Rayyan software for exclusion of duplicates and further selection by titles and abstracts, which resulted in 33 articles for this review. RESULTS: According to the included studies, kHz can increase torque and generate hypertrophy. Only the studies with Russian current showed hypertrophy gains. Dosimetry was not always detailed in the studies, which hinders stipulating optimal parameters for kHz. CONCLUSION: From this review, it is concluded that NMSC by kHz is a valid resource to optimize AOMF, although the dosimetric parameters are still inconsistent.
Subject(s)
Electric Stimulation Therapy , Electric Stimulation Therapy/methods , Humans , Hypertrophy , Muscle Contraction/physiology , Muscle, Skeletal , Muscles , TorqueABSTRACT
INTRODUÇÃO: A dor lombar crônica (DLC) é uma síndrome que compromete negativamente a capacidade funcional dos indivíduos. OBJETIVO: Verificar se há diferença no nível de incapacidade autorrelatado entre pacientes alocados nos diferentes estratos de risco para desenvolver mau prognóstico na DLC. MATERIAIS E MÉTODOS: Trata-se de um estudo piloto, observacional e transversal. A amostra foi composta por 17 voluntários com DLC, provenientes de um Centro de Reabilitação Física universitário local. Os voluntários foram solicitados a responder dois questionários, tanto para avaliação do nível de incapacidade quanto para determinar o risco de mau prognóstico. O nível de incapacidade autorrelatado foi determinado pela Versão Brasileira do Índice Funcional de Oswestry (IFO). O risco para desenvolver mau prognóstico foi determinado pelo questionário STarT Back Screening Tool (SBST), baseado na influência dos fatores psicossociais, e os voluntários foram classificados em baixo (n=6), médio (n=6) ou alto (n=5) risco de mau prognóstico. O teste estatístico utilizado foi o Generalized Linear Model (GLzM), com α=0,05. RESULTADOS: O grupo de baixo risco apresentou incapacidade mínima e os grupos com médio e alto risco apresentaram incapacidade severa, porém observouse diferença estatística no IFO apenas entre os grupos de baixo e alto risco. CONCLUSÃO: Houve diferença na incapacidade autorrelatada entre os estratos de risco de mau prognóstico, sendo a incapacidade significativamente mais alta no grupo alto risco em comparação com o baixo risco, sugerindo que os aspectos psicossociais impactam não só para o prognóstico, mas também o nível de incapacidade de pacientes com dor lombar crônica.
INTRODUCTION: Chronic low back pain (CLBP) is a syndrome that compromises individual functional capacity negatively AIM: To verify whether there is a difference in the self-reported disability level among patients allocated into different risk strata to develop poor prognosis in CLBP. MATERIALS AND METHODS: This is a pilot, observational and cross-sectional study. The sample consisted of 17 volunteers with CLBP from a local University Physical Rehabilitation Center. Volunteers were asked to answer two questionnaires to assess both the level of disability and to determine the risk of poor prognosis. The level of disability was determined by the Brazilian Version of the Oswestry Functional Index (IFO). The risk for developing poor prognosis was determined by the STarT Back Screening Tool (SBST) questionnaire, based on the influence of psychosocial factors, and volunteers were classified as low (n=6), medium (n=6) or high (n=5) risk of poor prognosis. The statistical test used was the Generalized Linear Model (GLzM), with α=0.05. RESULTS: The low-risk group presented minimal disability and the medium and high-risk groups presented severe disability, but there was a statistical difference in IFO only between the low and high-risk groups. CONCLUSION: There was a difference in disability between risk strata of poor prognosis, with disability significantly higher in the high-risk group compared to low-risk, suggesting that psychosocial aspects impact not only on prognosis but also on the level of disability of patients with chronic low back pain.
