Influence of Hip Joint Position on Muscle Activity during Prone Hip Extension          with Knee Flexion

Suehiro, Tadanobu; Mizutani, Masatoshi; Okamoto, Mitsuhisa; Ishida, Hiroshi; Kobara, Kazukuni; Fujita, Daisuke; Osaka, Hiroshi; Takahashi, Hisashi; Watanabe, Susumu

doi:10.1589/jpts.26.1895

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…On the other hand, s-GMax EMG activity with PR-Ext-ER was significantly higher than that with PR-Ext and PR-Ext-IR. This finding is the same as in a previous study 14 ) , which observed increased GMax activity during extension in external rotation in comparison with that during extension in a neutral hip joint position. In other words, shortening GMax by externally rotating the hip joint is a means of increasing activity.…”

Section: Discussionsupporting

confidence: 92%

Piriformis electromyography activity during prone and side-lying hip joint movement

et al. 2018

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[Purpose] To measure electromyographic activity of the piriformis using fine-wire electrodes during 7 hip movements. [Subjects and Methods] Eleven healthy men, without severe low back pain or lower limb injury, participated in this study. Fine-wire electrodes were inserted into the piriformis and surface electrodes were attached to the muscles in the hip region and the trunk muscles on the dominant arm side. Electromyographic signal amplitude was measured during 7 hip movements: side-lying external rotation in hip neutral position, side-lying abduction in hip neutral position, side-lying abduction in hip external rotation, side-lying abduction in hip internal rotation, prone extension in hip neutral position, prone extension in hip external rotation, and prone extension in hip internal rotation. Repeated-measures one-way analysis of variance was used to examine electromyographic activity in each of the 7 hip movements. [Results] Piriformis electromyographic activity was highest during prone hip extension in external rotation. Both the superior and inferior portions of the gluteus maximus were also highly activated during prone hip extension in external rotation. [Conclusion] Prone hip extension in external rotation induced high electromyographic activity in the piriformis and superior and inferior gluteus maximus muscles.

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Section: Discussionsupporting

confidence: 92%

Piriformis electromyography activity during prone and side-lying hip joint movement

et al. 2018

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“…In this study, subjects abducted the hip prior to and during performance of PHEKF exercise, which led to GM activation as a hip abductor, and this increased its responsiveness during PHEKF relative to position N. GM onset relative to the hamstrings was also significantly earlier in the ABER position than in the AB position. Previous work demonstrated that because external rotation of the hip in PHEKF exercise reduces the amount of hamstring muscle activity and the hip extension moment that can be exerted by the hamstrings, the GM is more active as an extensor compared with the hamstrings 17 ) . Therefore, the relative onset time of the GM as a driving force for hip extension in position ABER seems to have occurred earlier.…”

Section: Discussionmentioning

confidence: 99%

Effect of abduction and external rotation of the hip joint on muscle onset time during prone hip extension with knee flexion

et al. 2015

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[Purpose] This study investigated the effect of hip position on muscle onset time during prone hip extension with knee flexion. [Subjects] The study included 21 healthy male volunteers. [Methods] Muscle onset times of the right gluteus maximus, right hamstrings, bilateral lumbar erector spinae, and bilateral lumbar multifidus were measured using surface electromyography during right hip extension with knee flexion in the prone position. Measurements were made with the hip in 3 positions: (1) neutral, (2) abduction, and (3) abduction and external rotation. [Results] Gluteus maximus onset relative to the hamstrings was significantly earlier with hip abduction and with hip abduction and external rotation compared with that with the hip in the neutral position. Gluteus maximus onset relative to the hamstrings was significantly earlier with hip abduction and external rotation compared with that with hip abduction. The bilateral multifidus and left lumbar erector spinae onset times relative to the hamstrings were significantly earlier with hip abduction and external rotation compared with those with hip abduction and with the hip in the neutral position. [Conclusion] Abduction and external rotation of the hip during prone hip extension with knee flexion is effective for advancing the onset times of the gluteus maximus, bilateral multifidus, and contralateral lumbar erector spinae.

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“…The starting position for HEXT was in a standing-prone position at 608 of hip flexion. [12][13][14] Participants were instructed to extend the tested leg until it was parallel to the long axis of the torso, and then they were positioned in 308 of abduction, 208 of external rotation, and 908 of knee flexion, which is often called a donkey-kick The nontest leg was in contact with the floor and the knee slightly bent for stability. The starting position for HAB was side lying with the nontest leg in 308 of hip and knee flexion and the test leg parallel with the long axis of the torso.…”

Section: Methodsmentioning

confidence: 99%

Weight-Bearing Versus Traditional Strength Assessments of the Hip Musculature

Freemyer

Urbi²,

Torigoe

et al. 2021

Journal of Athletic Training

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Context Traditional nonweight-bearing (NWB) hip-strength assessments may not directly translate to functional strength during weight-bearing (WB) activity. How NWB assessments of hip muscle strength compare with WB assessments in various positions is currently unknown. Objective To determine the magnitude of the differences and correlations between NWB hip strength and WB functional strength during the squatting and lunge (LNG) positions in female athletes. Design Crossover design. Setting Laboratory. Patients or Other Participants Female athletes (N = 51, age = 16.2 ± 3.5 years, height = 161.5 ± 8.3 cm, mass = 58.3 ± 11.6 kg). Intervention(s) Isometric resistance (N/kg) was determined for the dominant and nondominant limbs via WB assessments (squat-bilateral [legs tested simultaneously], squat-unilateral, and lunge positions) and NWB assessments (hip abduction [HAB], hip extension HEXT], and hip external rotation [HER]). Main Outcome Measure(s) To compare differences between positions (P ≤ .05), we used effect sizes (d) and matched-pairs t tests, and we calculated Pearson r and R2 values. Results During the squat-bilateral on the dominant limb, females produced the most hip torque (6.13 ± 1.12 N/kg). The magnitudes of differences were very large compared with HER (3.96 ± 0.83, d = 2.2), HEXT (3.22 ± 0.69, d = 3.2), and HAB (3.80 ± 1.01, d = 2.2; all P values ≤ .01), and positions were moderately correlated (r = 0.347–0.419, R2 = 0.12–0.18). The lunge position produced the least amount of torque in the dominant limb (2.44 ± 0.48 N/kg) compared with HER (d = −2.3), HEXT (d = −1.3), and HAB (d = −1.7; all P values ≤ .001), and correlations were small to moderate (r = 0.236–0.310, R2 = 0.06–0.10). Conclusions Strength in WB positions was different than strength evaluated using traditional NWB assessments in female athletes. Weight-bearing tests may provide clinicians with additional information regarding strength and function.

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Influence of Hip Joint Position on Muscle Activity during Prone Hip Extension with Knee Flexion

Cited by 9 publications

References 18 publications

Piriformis electromyography activity during prone and side-lying hip joint movement

Piriformis electromyography activity during prone and side-lying hip joint movement

Effect of abduction and external rotation of the hip joint on muscle onset time during prone hip extension with knee flexion

Weight-Bearing Versus Traditional Strength Assessments of the Hip Musculature

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