Altered muscular activation during prone hip extension in women with and without low back pain

Abstract

BackgroundAltered movement pattern has been associated with the development of low back pain (LBP). The purpose of this study was to investigate the activity pattern of the ipsilateral erector spinae (IES) and contralateral erectorspinae (CES), gluteus maximus (GM) and hamstring (HAM) muscles during prone hip extension (PHE) test in women with and without LBP. A cross-sectional non-experimental design was used.MethodsConvenience sample of 20 female participated in the study. Subjects were categorized into two groups: with LBP (n = 10) and without LBP (n = 10). The electromyography (EMG) signal amplitude of the tested muscles during PHE (normalized to maximum voluntary electrical activity (MVE)) was measured in the dominant lower extremity in all subjects.ResultsStatistical analysis revealed greater normalized EMG signal amplitude in women with LBP compared to non-LBP women. There was significant difference in EMG activity of the IES (P = 0.03) and CES (P = 0.03) between two groups. However, no significant difference was found in EMG signals of the GM (P = 0.11) and HAM (P = 0.14) among two groups.ConclusionThe findings of this study demonstrated altered activation pattern of the lumbo-pelvic muscles during PHE in the women with chronic LBP. This information is important for investigators using PHE as either an evaluation tool or a rehabilitation exercise.

Influence of Gluteus Maximus Inhibition on Upper Trapezius Overactivity in Chronic Mechanical Neck Pain With Radiculopathy

“…It is suggested that the young age of our participants was an important factor, as increased inhibition severity of gluteus maximus will lead to activation of the upper trapezius and abnormal sequence III that occurs with age progression. Arab et al [21] found that in some cases an inhibited muscle may be working harder than normal to produce the required force for a particular task, thus, the GM activation percent of the MVIC is increased to accomplish hip extension.…”

“…The mean of the three trials for each exercise was used for analysis. Some trials were excluded because of noise in recorded EMG signals and because of improper recording [21]. After the prone hip extension trials were completed, we collected the EMG activity during maximal voluntary isometric contraction (MVIC) trials in which maximal manual resistance was applied to each muscle group.…”

Recurrent hamstring muscle injury: applying the limited evidence in the professional football setting with a seven-point programme

“…Leg length asymmetries have also been associated with innominate bone rotation, anteriorly on the side of the shortened and posteriorly on the side of the lengthened limb57. SIJ dysfunction has also been reported to be associated with gluteal hip extensor weakness in patients with lower back pain, compared with patients with lower back pain without SIJ dysfunction 58. Elite sprinters who subsequently sustained HMI also demonstrated reduced concentric hip extensor strength relative to uninjured sprinters 59.…”

Relação Entre a Sequência De Ativação E a Atividade Muscular Lombopélvica De Mulheres Com Dor Lombar Crônica: Estudo Piloto

“…[4] O início da contração muscular (onset) e a amplitude da atividade muscular são, geralmente, medidos para avaliar padrões de ativação do músculo em disfunções músculo-esqueléticas usando eletromiografia (EMG). [5] O objetivo do estudo piloto foi avaliar se existe relação entre a sequência da ativação e da atividade da musculatura lombopélvica em mulheres com dor lombar crônica. [6] Para os eretores espinhais da coluna lombar contralateral a perna testada (EC) e ipsilateral (EI) os eletrodos foram posicionados a 2 centímetros do processo espinhoso da primeira vértebra lombar (L1); para GM ipsilateral a perna testada os eletrodos foram posicionados no ponto médio da linha entre o grande trocanter do fêmur e a segunda vertebra sacral e para BF os eletrodos foram posicionados no ponto médio entre a tuberosidade isquiática e o epicôndilo lateral da tíbia.…”