Femoral anteversion influences vastus medialis and gluteus medius EMG amplitude: composite hip abductor EMG amplitude ratios during isometric combined hip abduction-external rotation

Nyland, John; Kuzemchek, S.; Parks, Marshall M.; Caborn, David N.M.

doi:10.1016/s1050-6411(03)00078-6

Cited by 92 publications

(70 citation statements)

References 27 publications

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“…An estimate of proximal femoral torsion in participants was not recorded. This may influence GMed EMG amplitude (Nyland et al , 2004) and may confound the measurements. As the study was undertaken in post-menopausal older women (controls and GTPS), generalisability to other populations is limited.…”

Section: Limitationsmentioning

confidence: 99%

A comparison of gluteus medius, gluteus minimus and tensor facia latae muscle activation during gait in post-menopausal women with and without greater trochanteric pain syndrome

Ganderton

Pizzari

Harle

et al. 2017

Journal of Electromyography and Kinesiology

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Section: Limitationsmentioning

confidence: 99%

A comparison of gluteus medius, gluteus minimus and tensor facia latae muscle activation during gait in post-menopausal women with and without greater trochanteric pain syndrome

Ganderton

Pizzari

Harle

et al. 2017

Journal of Electromyography and Kinesiology

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“…People with anteverted hips have less EMG activity during the CLAM exercise than people with normal hips30; therefore, passive hip internal range of motion also was measured for each participant as a measure of relative femoral anteversion using the procedures described by Kozic et alY The average amount of passive hip internal rotation was 31.27°±9.49°, and only 2 participants had values greater than 42°, indicating an anteverted hip. 30 Researchers 26 comparing the EMG activity of several exercises have reported a moderate effect (effect size=0.65). Based on these data, at least 17 participants were necessary to achieve a power of 0.8 with an a level set at .05 for comparing muscles and exercises.…”

Section: Participantsmentioning

confidence: 99%

Hip Muscle Activity During 3 Side-Lying Hip-Strengthening Exercises in Distance Runners

McBeth

Earl-Boehm

Cobb

et al. 2012

Journal of Athletic Training

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Context: Lower extremity overuse injuries are associated with gluteus medius (GMed) weakness. Understanding the activation of muscles about the hip during strengthening exercises is important for rehabilitation. Objective: To compare the electromyographic activity produced by the gluteus medius (GMed), tensor fascia latae (TFL), anterior hip flexors (AHF), and gluteus maximus (GMax) during 3 hip-strengthening exercises: hip abduction (ABD), hip abduction with external rotation (ABD-ER), and clamshell (CLAM) exercises. Design: Controlled laboratory study. Setting: Laboratory. Patients or Other Participants: Twenty healthy runners (9 men, 11 women; age = 25.45 ± 5.80 years, height = 1.71 ± 0.07 m, mass = 64.43 ± 7.75 kg) participated. Intervention(s): A weight equal to 5% body mass was affixed to the ankle for the ABD and ABD-ER exercises, and an equivalent load was affixed for the CLAM exercise. A pressure biofeedback unit was placed beneath the trunk to provide positional feedback. Main Outcome Measure(s): Surface electromyography (root mean square normalized to maximal voluntary isometric contraction) was recorded over the GMed, TFL, AHF, and GMax. Results: Three 1-way, repeated-measures analyses of variance indicated differences for muscle activity among the ABD (F3,57 = 25.903, P<.001), ABD-ER (F3,57 = 10.458, P<.001), and CLAM (F3,57 = 4.640, P=.006) exercises. For the ABD exercise, the GMed (70.1 ± 29.9%), TFL (54.3 ± 19.1%), and AHF (28.2 ± 21.5%) differed in muscle activity. The GMax (25.3 ± 24.6%) was less active than the GMed and TFL but was not different from the AHF. For the ABD-ER exercise, the TFL (70.9 ± 17.2%) was more active than the AHF (54.3 ± 24.8%), GMed (53.03 ± 28.4%), and GMax (31.7 ± 24.1 %). For the CLAM exercise, the AHF (54.2 ± 25.2%) was more active than the TFL (34.4 ± 20.1%) and GMed (32.6 ± 16.9%) but was not different from the GMax (34.2 ± 24.8%). Conclusions: The ABD exercise is preferred if targeted activation of the GMed is a goal. Activation of the other muscles in the ABD-ER and CLAM exercises exceeded that of GMed, which might indicate the exercises are less appropriate when the primary goal is the GMed activation and strengthening.

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“…The quadriceps, especially the vastus medialis, provide dynamic patellofemoral joint stabilization 33) . When the vastus medialis and gluteus medius act as synergists, the patella is stabilized within the femoral trochlea, and the femoral internal rotation-adduction associated with the loading response is decreased during the weight-acceptance stage of the gait cycle 21) . Thus, imbalanced activation between the VMO and VL due to a weakened VMO may lead to instability in the patellofemoral joint and lateral tracking of the patella 34) .…”

Section: Discussionmentioning

confidence: 99%

“…This test is a method for assessing femoral anteversion, which is estimated from the angle formed between vertical and the maximal passive medial hip rotation. For the present study, only subjects with over 20° medial hip rotation were chosen 21) . All subjects read and signed an informed consent form approved by the Inje University Ethics Committee for Human Investigations prior to their participation.…”

Section: Methodsmentioning

confidence: 99%

Effects of Visual Biofeedback Using a Laser Beam on the EMG ratio of the Medial and Lateral Vasti Muscles and Kinematics of Hip and Knee Joints during a Squat Exercise

Yoon

Kang

2011

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to examine the effects of visual biofeedback on the EMG ratio of the medial and lateral vasti muscles and on the lower extremity joint angles during squat exercises performed by subjects with femoral anteversion.[Subjects] Seventeen subjects (5 men, 12 women) with femoral anteversion participated in this study.[Methods] Subjects performed a double-leg squat with and without visual biofeedback using a laser beam fixed to a patella strap. The peak angles of hip internal rotation and knee valgus were analyzed using a 3D motion analysis system, and the vastus medialis oblique/vastus lateralis (VMO/VL) activity ratio was calculated using the value recorded by surface electromyography during the squat exercises.[Results] Significant decreases were found in the hip internal rotation angle and knee valgus angle, and a significant increase in the VMO/VL activity ratio was observed on the dominant side when performing a double-leg squat with visual biofeedback using a laser beam.[Conclusions] We suggest that laser-beam visual biofeedback would be used as an effective for improving VMO muscle strength and reducing the angle of hip internal rotation and knee valgus during squat exercises.

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Femoral anteversion influences vastus medialis and gluteus medius EMG amplitude: composite hip abductor EMG amplitude ratios during isometric combined hip abduction-external rotation

Cited by 92 publications

References 27 publications

A comparison of gluteus medius, gluteus minimus and tensor facia latae muscle activation during gait in post-menopausal women with and without greater trochanteric pain syndrome

A comparison of gluteus medius, gluteus minimus and tensor facia latae muscle activation during gait in post-menopausal women with and without greater trochanteric pain syndrome

Hip Muscle Activity During 3 Side-Lying Hip-Strengthening Exercises in Distance Runners

Effects of Visual Biofeedback Using a Laser Beam on the EMG ratio of the Medial and Lateral Vasti Muscles and Kinematics of Hip and Knee Joints during a Squat Exercise

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