Hip Abductor Weakness and Lower Extremity Kinematics during Running

Heinert, Becky; Kernozek, Thomas W.; Greany, John; Fater, Dennis C.

doi:10.1123/jsr.17.3.243

Cited by 58 publications

(54 citation statements)

References 32 publications

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“…Frontal plane dynamic alignment at the hip should also be further investigated. Weakness of the hip abductor muscles has been linked to differences in lower extremity kinematics 14 and also to overuse injuries 23 in runners. Strengthening of weak hip abductors in runners with high peak hip adduction angle may enable improvement of hip kinematics during running.…”

Section: Discussionmentioning

confidence: 99%

Distinct Hip and Rearfoot Kinematics in Female Runners With a History of Tibial Stress Fracture

Milner

Hamill²,

Davis³

2010

J Orthop Sports Phys Ther

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Section: Discussionmentioning

confidence: 99%

Distinct Hip and Rearfoot Kinematics in Female Runners With a History of Tibial Stress Fracture

Milner

Hamill²,

Davis³

2010

J Orthop Sports Phys Ther

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“…A recreational athlete was defined as anyone participating in aerobic or athletic activity at least three times per week (Heinert et al, 2008). Anyone with current injury or previous surgery in the lower limb, or who had cardiovascular, pulmonary, neurological, or systemic conditions that limited physical activity, were excluded from the study.…”

Section: Methodsmentioning

confidence: 99%

Relationship Between Eccentric Hip Torque and Lower-Limb Kinematics: Gender Differences

Baldon

Lobato²,

Carvalho³

et al. 2011

Journal of Applied Biomechanics

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The purposes of this study were to compare lower-limb kinematics between genders, and determine the relationships among eccentric hip abductor and lateral rotator torques and lower-limb kinematics. The movements of the pelvis, femur, and knee were calculated for 16 women and 16 men during the single-leg squat. Eccentric hip abductor and lateral rotator torques were measured using an isokinetic dynamometer. The results showed that women had greater contralateral pelvic depression, femur adduction, and knee abduction than men. The eccentric hip abductor and lateral rotator torques were correlated with coronal plane femur and knee movements in the overall sample. When the genders were analyzed separately, it was observed that women with greater eccentric hip abductor torque exhibited less femur adduction and femur medial rotation, and greater knee adduction excursion. No significant relationship was observed between the isokinetic and kinematic variables in the male group. The differences between the genders help to explain the greater rate of knee disorders observed in women. Moreover, the eccentric hip abduction action seemed to be more important in women to control the lower-limb movements.

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“…This change in joint kinematics represents a large effect size (0.7) relative to the variability of these measures established in a previous study 22 23 Therefore, 20 physically active women from a university campus (age 5 21.0 6 1.3 years, height 5 167.9 6 5.9 cm, mass 5 61.8 6 8.4 kg) were recruited for this study. Being physically active was defined as participating in aerobic or athletic activity at least 3 times per week for at least 30 minutes each time.…”

Section: Participantsmentioning

confidence: 99%

Hip-Abductor Fatigue and Single-Leg Landing Mechanics in Women Athletes

Patrek

Kernozek

Willson

et al. 2011

Journal of Athletic Training

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Context: Reduced hip-abductor strength and muscle activation may be associated with altered lower extremity mechanics, which are thought to increase the risk for anterior cruciate ligament injury. However, experimental evidence supporting this relationship is limited. Objective: To examine the changes in single-leg landing mechanics and gluteus medius recruitment that occur after a hip-abductor fatigue protocol. Design: Descriptive laboratory study. Patients or Other Participants: Twenty physically active women (age = 21.0 ± 1.3 years). Intervention(s): Participants were tested before (prefatigue) and after (postfatigue) a hip-abductor fatigue protocol consisting of repetitive side-lying hip abduction. Main Outcome Measure(s): Outcome measures included sagittal-plane and frontal-plane hip and knee kinematics at initial contact and at 60 milliseconds after initial contact during 5 single-leg landings from a height of 40 cm. Peak hip and knee sagittal-plane and frontal-plane joint moments during this time interval were also analyzed. Measures of gluteus medius activation, including latency, peak amplitude, and integrated signal, were recorded. Results: A small (<1°) increase in hip-abduction angle at initial contact and a small (<1°) decrease in knee-abduction (valgus) angle at 60 milliseconds after contact were observed in the postfatigue landing condition. No other kinematic changes were noted for the knee or hip at initial contact or at 60 milliseconds after initial contact. Peak external knee-adduction moment decreased 27% and peak hip adduction moment decreased 24% during the postfatigue landing condition. Gluteus medius activation was delayed after the protocol, but no difference in peak or integrated signal was seen during the landing trials. Conclusions: Changes observed during single-leg landings after hip-abductor fatigue were not generally considered unfavorable to the integrity of the anterior cruciate ligament. Further work may be justified to study the role of hip-abductor activation in protecting the knee during landing.

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Hip Abductor Weakness and Lower Extremity Kinematics during Running

Abstract: Hip abductor weakness may influence knee abduction during the stance phase of running.

Cited by 58 publications

References 32 publications

Distinct Hip and Rearfoot Kinematics in Female Runners With a History of Tibial Stress Fracture

Distinct Hip and Rearfoot Kinematics in Female Runners With a History of Tibial Stress Fracture

Relationship Between Eccentric Hip Torque and Lower-Limb Kinematics: Gender Differences

Hip-Abductor Fatigue and Single-Leg Landing Mechanics in Women Athletes

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