2024-03-29T10:40:06Zhttps://thescholarship.ecu.edu/oai/requestoai:TheScholarship.intra.ecu.edu:10342/99932022-03-12T08:15:19Zcom_10342_107com_10342_73col_10342_113
2022-03-11T18:01:47Z
urn:hdl:10342/9993
Walking Velocity and Step Length Adjustments Affect Knee Joint Contact Forces in Healthy Weight and Obese Adults
Willson, John
Meardon, Stacey A.
Knee osteoarthritis
joint contact force
gait
2022-03-11T18:01:47Z
2022-03-11T18:01:47Z
2018-05-24
Article
0736-0266
http://hdl.handle.net/10342/9993
10.1002/jor.24031
en_US
oai:TheScholarship.intra.ecu.edu:10342/42772021-03-03T20:52:12Zcom_10342_107com_10342_73col_10342_113
2013-10-15T18:41:26Z
urn:hdl:10342/4277
Effects of Medially Wedged Foot Orthoses on Knee and Hip Joint Running Mechanics in Females With and Without Patellofemoral Pain Syndrome.
Boldt, Andrew R.
Willson, John D.
Barrios, Joaquin A.
Kernozek, Thomas W.
Gait
Kinetics
Rehabilitation
We examined the effects of medially wedged foot orthoses on knee and hip joint mechanics during running in females with and without patellofemoral pain syndrome (PFPS). We also tested if these effects depend on standing calcaneal eversion angle. Twenty female runners with and without PFPS participated. Knee and hip joint transverse and frontal plane peak angle, excursion, and peak internal knee and hip abduction moment were calculated while running with and without a 6° full-length medially wedged foot orthoses. Separate 3-factor mixed ANOVAs (group [PFPS, control] x condition [medial wedge, no medial wedge] x standing calcaneal angle [everted, neutral, inverted]) were used to test the effect of medially wedged orthoses on each dependent variable. Knee abduction moment increased 3% (P = .03) and hip adduction excursion decreased 0.6° (P < .01) using medially wedged foot orthoses. No significant group x condition or calcaneal angle x condition effects were observed. The addition of medially wedged foot orthoses to standardized running shoes had minimal effect on knee and hip joint mechanics during running thought to be associated with the etiology or exacerbation of PFPS symptoms. These effects did not appear to depend on injury status or standing calcaneal posture. ABSTRACT FROM AUTHOR
2013-10-15T18:41:26Z
2013-10-15T18:41:26Z
2013
Article
Journal Of Applied Biomechanics; 29:1 p. 68-77
http://hdl.handle.net/10342/4277
22815282
en_US
oai:TheScholarship.intra.ecu.edu:10342/34102021-03-03T20:52:58Zcom_10342_107com_10342_73col_10342_113
2011-04-28T18:07:27Z
urn:hdl:10342/3410
Kinematic and Electromyographic Analysis of Elbow Flexion During Inertial Exercise
Tracy, James E.
Obuchi, Shuchi
Johnson, Ben
Inertial exercise
Kinematic data
Electromyographic data
Inertial exercise protocols are currently used clinically to improve and restore normal muscle function even though research to substantiate their effectiveness cannot be cited in the literature. The purpose of this study was to compare simultaneous kinematic and electromyographic (EMG) data obtained from 12 subjects during elbow flexion on the Impulse Inertial Exercise System. Testing sessions consisted of inertial exercise performed using phasic and tonic techniques with loads of: a) 0 kg, b) 2.27 kg, c) 4.54 kg, d) 6.80 kg, and e) 9.07 kg. Greater peak angular velocities, peak plafform accelerations (change in velocity of plafform during elbow flexion), mean and peak triceps brachii muscle EMG activity, and less range of motion were observed during phasic exercise. There was also a general trend for peak angular velocities and peak plafform acceleration to increase as the load decreased. No significant difference in mean or peak EMG activity of the biceps brachii muscle was seen between techniques. Clinicians and athletic trainers using inertial exercise should consider both the exercise technique and load characteristics when designing protocols to meet the specific needs of patients. Originally published Journal of Athletic Training, Vol. 30, No. 3, Sep 1995
2011-04-28T18:07:27Z
2011-05-17T13:55:47Z
2011-04-28T18:07:27Z
2011-05-17T13:55:47Z
1995-09
Article
Journal of Athletic Training; 30:3 p. 254-258
http://hdl.handle.net/10342/3410
PMC1317871
en_US
http://www.journalofathletictraining.org/
Author notified of opt-out rights by Cammie Jennings prior to upload of this article.
East Carolina University
oai:TheScholarship.intra.ecu.edu:10342/43532021-03-03T20:52:12Zcom_10342_107com_10342_73col_10342_113
2014-02-03T15:15:16Z
urn:hdl:10342/4353
A pathomechanical paradigm for treating the injured runner
Willy, Richard W.
Biomechanics
Running
Physical therapy
Pathological mechanics are thought
to play a role in many common
running injuries. A review of the
biomechanical literature reveals that
a given running injury may be associated
with multiple faulty running
mechanics. Traditional rehabilitation
programs have focused their
efforts on addressing the injured
anatomical structure. By focusing
rehabilitation programs on correcting
the pathomechanics of an injury,
outcomes may be improved. Since
the underlying faulty mechanics have
been addressed, risk of reinjury may
also be decreased. In this article, a
pathomechanical paradigm for the
treatment of the injured runner is
introduced. Emphasis is placed on
recognizing the most common types
of faulty running mechanics often
encountered in the clinical setting
and their implications for injury.
Finally, suggested treatment
techniques are described.
2014-02-03T15:15:16Z
2014-02-03T15:15:16Z
2013
Article
Norsk Idrettsmedisin; 28:3 p. 6-10
http://hdl.handle.net/10342/4353
en_US
http://viewer.zmags.com/publication/f08194eb#/f081
http://legeforeningen.no/spesial/Norsk-forening-for-idrettsmedisin-og-fysisk-aktivitet/Norsk-idrettsmedisin/?so=0
oai:TheScholarship.intra.ecu.edu:10342/113042022-09-23T07:16:03Zcom_10342_107com_10342_73col_10342_113
2022-09-22T20:16:50Z
urn:hdl:10342/11304
Cognitive-Motor Interference Heightens the Prefrontal Cortical Activation and Deteriorates the Task Performance in Children With Hemiplegic Cerebral Palsy
Surkar, Swati M.
Hoffman, Rashelle M.
Harbourne, Regina
Kurz, Max J.
Cerebral palsy
Cognition
Rehabilitation
2022-09-22T20:16:50Z
2022-09-22T20:16:50Z
2021-02
Article
0003-9993
http://hdl.handle.net/10342/11304
10.1016/j.apmr.2020.08.014
en_US
oai:TheScholarship.intra.ecu.edu:10342/43492021-03-03T20:55:45Zcom_10342_107com_10342_73col_10342_113
2014-01-31T21:31:40Z
urn:hdl:10342/4349
Kinematic and kinetic comparison of running in standard and minimalist shoes
Willy, Richard W.
Davis, Irene S.
Ground reaction forces
Injury prevention
Biomechanics
Loading rate
The purpose of this study was to determine if running in a minimalist shoe results in a reduction in ground reaction forces and alters kinematics over standard shoe running. The secondary purpose of this study was to determine if within–session accommodation to a novel minimalist shoe occurs. Running in a minimalist shoe appears to, at least in the short–term, increase loading of the lower extremity over standard shoe running. The accommodation period resulted in less favorable landing mechanics in both shoes. These findings bring into question whether minimal shoes will provide enough feedback to induce an alteration that is similar to barefoot running.
2014-01-31T21:31:40Z
2014-01-31T21:31:40Z
2013-07
Article
East Carolina University, Greenville, North Carolina
http://hdl.handle.net/10342/4349
23877378
10.1249/MSS.0b013e3182a595d2
en_US
http://journals.lww.com/acsm-msse/pages/default.aspx
oai:TheScholarship.intra.ecu.edu:10342/49802021-03-03T20:57:56Zcom_10342_7351com_10342_6421com_10342_1com_10342_107com_10342_73col_10342_7362col_10342_6408col_10342_7167col_10342_113
2015-08-07T16:44:50Z
urn:hdl:10342/4980
PI3K mediated activation of GSK‑3β reduces at‑level primary afferent growth responses associated with excitotoxic spinal cord injury dysesthesias
Bareiss, Sonja
Dugan, Elizabeth
Brewer, Kori L.
GSK-3β
Spinal cord injury (SCI)
Pain
Dysesthesias
Dorsal root ganglia
Neurite outgrowth
Background
Neuropathic pain and sensory abnormalities are a debilitating secondary consequence of spinal cord injury (SCI). Maladaptive structural plasticity is gaining recognition for its role in contributing to the development of post SCI pain syndromes. We previously demonstrated that excitotoxic induced SCI dysesthesias are associated with enhanced dorsal root ganglia (DRG) neuronal outgrowth. Although glycogen synthase kinase-3β (GSK-3β) is a known intracellular regulator neuronal growth, the potential contribution to primary afferent growth responses following SCI are undefined. We hypothesized that SCI triggers inhibition of GSK-3β signaling resulting in enhanced DRG growth responses, and that PI3K mediated activation of GSK-3β can prevent this growth and the development of at-level pain syndromes.
Results
Excitotoxic SCI using intraspinal quisqualic acid (QUIS) resulted in inhibition of GSK-3β in the superficial spinal cord dorsal horn and adjacent DRG. Double immunofluorescent staining showed that GSK-3βP was expressed in DRG neurons, especially small nociceptive, CGRP and IB4-positive neurons. Intrathecal administration of a potent PI3-kinase inhibitor (LY294002), a known GSK-3β activator, significantly decreased GSK-3βP expression levels in the dorsal horn. QUIS injection resulted in early (3 days) and sustained (14 days) DRG neurite outgrowth of small and subsequently large fibers that was reduced with short term (3 days) administration of LY294002. Furthermore, LY294002 treatment initiated on the date of injury, prevented the development of overgrooming, a spontaneous at-level pain related dysesthesia.
Conclusions
QUIS induced SCI resulted in inhibition of GSK-3β in primary afferents and enhanced at-level DRG intrinsic growth (neurite elongation and initiation). Early PI3K mediated activation of GSK-3β attenuated QUIS-induced DRG neurite outgrowth and prevented the development of at-level dysesthesias.
2015-08-07T16:44:50Z
2015-08-07T16:44:50Z
2015-06-21
Article
Molecular Pain; 11:35 p. 1-15
http://hdl.handle.net/10342/4980
PMC4475622
10.1186/s12990-015-0041-2
en
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4475622/
oai:TheScholarship.intra.ecu.edu:10342/99922022-03-12T08:15:20Zcom_10342_107com_10342_73col_10342_113
2022-03-11T18:01:43Z
urn:hdl:10342/9992
Patellofemoral Joint and Achilles Tendon Loads During Overground and Treadmill Running
Willson, John
Patellofemoral Joint
Achilles Tendon
Running
2022-03-11T18:01:43Z
2022-03-11T18:01:43Z
2016-08-01
Article
0190-6011
http://hdl.handle.net/10342/9992
10.2519/jospt.2016.6494
en_US
oai:TheScholarship.intra.ecu.edu:10342/43502021-03-03T20:53:47Zcom_10342_107com_10342_73col_10342_113
2014-01-31T21:31:46Z
urn:hdl:10342/4350
Are mechanics different between male and female runners with patellofemoral pain?
Willy, Richard W.
Davis, Irene S.
Manal, Kurt T.
Witvrouw, Erik E.
Biomechanics
Physical therapy
Sports medicine
INTRODUCTION:
Patellofemoral pain (PFP) has often been attributed to abnormal hip and knee mechanics in females. To date, there have been few investigations of the hip and knee mechanics of males with PFP. The purpose of this study was to compare the lower extremity mechanics and alignment of male runners with PFP with healthy male runners and female runners with PFP. We hypothesized that males with PFP would move with greater varus knee mechanics compared with male controls and compared with females with PFP. Furthermore, it was hypothesized that males with PFP would demonstrate greater varus alignment. METHODS:
A gait and single-leg squat analysis was conducted on each group (18 runners per group). Measurement of each runner's tibial mechanical axis was also recorded. Motion data were processed using Visual 3D (C-Motion, Bethesda, MD). ANOVAs were used to analyze the data. RESULTS: Males with PFP ran and squatted in greater peak knee adduction and demonstrated greater peak knee external adduction moment compared with healthy male controls. In addition, males with PFP ran and squatted with less peak hip adduction and greater peak knee adduction compared with females with PFP. The static measure of mechanical axis of the tibial was not different between groups. However, a post hoc analysis revealed that males with PFP ran with greater peak tibial segmental adduction. CONCLUSION: Males with PFP demonstrated different mechanics during running and during a single-leg squat compared with females with PFP and with healthy males. Based upon the results of this study, therapies for PFP may need to be sex specific. NOTE: This is a non-final version of an article published in final form in Medicine & Science in Sports & Exercise 44, no. 11 (Nov 2012): 2165-2171.
2014-01-31T21:31:46Z
2014-01-31T21:31:46Z
2012-11
Article
Medicine & Science in Sports & Exercise; 44:11 p. 2165-2171
http://hdl.handle.net/10342/4350
22843103
10.1249/MSS.0b013e3182629215
en_US
http://journals.lww.com/acsm-msse/pages/default.aspx
oai:TheScholarship.intra.ecu.edu:10342/43512021-03-03T20:54:10Zcom_10342_107com_10342_73col_10342_113
2014-01-31T21:31:53Z
urn:hdl:10342/4351
Mirror gait retraining for the treatment of patellofemoral pain in female runners.
Willy, Richard W.
Scholz, John P.
Davis, Irene S.
Patellofemoral pain
Running
Rehabilitation
Hip
Patella
BACKGROUND:
Abnormal hip mechanics are often implicated in female runners with patellofemoral pain. We sought to evaluate a simple gait retraining technique, using a full-length mirror, in female runners with patellofemoral pain and abnormal hip mechanics. Transfer of the new motor skill to the untrained tasks of single leg squat and step descent was also evaluated.
METHODS:
Ten female runners with patellofemoral pain completed 8 sessions of mirror and verbal feedback on their lower extremity alignment during treadmill running. During the last 4 sessions, mirror and verbal feedback were progressively removed. Hip mechanics were assessed during running gait, a single leg squat and a step descent, both pre- and post-retraining. Subjects returned to their normal running routines and analyses were repeated at 1-month and 3-month post-retraining. Data were analyzed via repeated measures analysis of variance.
FINDINGS:
Subjects reduced peaks of hip adduction, contralateral pelvic drop, and hip abduction moment during running (P<0.05, effect size=0.69-2.91). Skill transfer to single leg squatting and step descent was noted (P<0.05, effect size=0.91-1.35). At 1 and 3 months post retraining, most mechanics were maintained in the absence of continued feedback. Subjects reported improvements in pain and function (P<0.05, effect size=3.81-7.61) and maintained through 3 months post retraining.
INTERPRETATION:
Mirror gait retraining was effective in improving mechanics and measures of pain and function. Skill transfer to the untrained tasks of squatting and step descent indicated that a higher level of motor learning had occurred. Extended follow-up is needed to determine the long term efficacy of this treatment.
2014-01-31T21:31:53Z
2014-01-31T21:31:53Z
2012-12
Article
Clinical Biomechanics; 27:10 p. 1045-1051
http://hdl.handle.net/10342/4351
22917625
10.1016/j.clinbiomech.2012.07.011
en_US
http://www.journals.elsevier.com/clinical-biomechanics
oai:TheScholarship.intra.ecu.edu:10342/109092022-12-09T19:34:54Zcom_10342_107com_10342_73col_10342_113
2022-07-22T19:07:01Z
urn:hdl:10342/10909
ADAP 1/Centaurin-α1 Negatively Regulates Dendritic Spine function and Memory Formation in the Hippocampus
Szatmari, Erzsebet M.
Moran, Corey
Cohen, Sarah S.
Jacob, Amanda
Parra-Bueno, Paula
Kamasawa, Naomi
Guerrero-Given, Debbie
Klein, Michael
Stackman Jr, Robert
Yasuda, Ryohei
ADAP1/Centaurin-a1
dendritic spines
learning and memory
2022-07-22T19:07:01Z
2022-07-22T19:07:01Z
2021
Article
2373-2822
http://hdl.handle.net/10342/10909
10.1523/eneuro.0111-20.2020
en_US
oai:TheScholarship.intra.ecu.edu:10342/114062022-10-04T07:16:04Zcom_10342_107com_10342_73col_10342_113
2022-10-03T18:24:27Z
urn:hdl:10342/11406
Measuring Exercise Capacity and Physical Function in Adult and Older Mice
Graber, Ted G.
Maroto, Rosario
Fry, Christopher S.
Brightwell, Camille R.
Rasmussen, Blake B.
Frailty
Neuromuscular decline
Sarcopenia
2022-10-03T18:24:27Z
2022-10-03T18:24:27Z
2021
Article
1079-5006
http://hdl.handle.net/10342/11406
10.1093/gerona/glaa205
en_US
oai:TheScholarship.intra.ecu.edu:10342/34082021-03-03T20:52:59Zcom_10342_107com_10342_73col_10342_113
2011-04-28T18:05:26Z
urn:hdl:10342/3408
Author's Response
Tracy, James E.
Inertial exercise
2011-04-28T18:05:26Z
2011-05-17T13:55:47Z
2011-04-28T18:05:26Z
2011-05-17T13:55:47Z
1996-01
Article
Journal of Athletic Training; 31:1 p. 5
http://hdl.handle.net/10342/3408
PMC1318347
en_US
http://www.journalofathletictraining.org/
Author notified of opt-out rights by Cammie Jennings prior to upload of this article.
East Carolina University
oai:TheScholarship.intra.ecu.edu:10342/43522021-03-03T20:57:48Zcom_10342_107com_10342_73col_10342_113
2014-01-31T21:31:58Z
urn:hdl:10342/4352
Varied response to mirror gait retraining of gluteus medius control, hip kinematics, pain, and function in 2 female runners with patellofemoral pain.
Willy, Richard W.
Davis, Irene S.
Knee
Running
Biomechanics
Electromyographic activity
Lower extremities
STUDY DESIGN:
Case report.
BACKGROUND:
The underlying mechanism of the changes in running mechanics after gait retraining is presently unknown. This case report assesses changes in muscle coordination and kinematics during treadmill running and step ascent in 2 female runners with patellofemoral pain after mirror gait retraining.
CASE DESCRIPTION:
Two female runners with chronic patellofemoral pain underwent 8 sessions of mirror gait retraining during treadmill running. Subjective measures and hip abductor strength were recorded at baseline and after the retraining phase. Changes in hip mechanics and electromyography data of the gluteus medius during treadmill running and step ascent were also assessed.
OUTCOMES:
Both runners reported improvements in pain and function that were maintained for at least 3 months. During running, peak contralateral pelvic drop (baseline-postretraining difference: runner 1, 2.6° less; runner 2, 1.7° less) and peak hip adduction (baseline-postretraining difference: runner 1, 5.2° less; runner 2, 6.3° less) were reduced after retraining. Kinematic reductions accompanied earlier activation of the gluteus medius relative to foot strike (baseline-postretraining difference: runner 1, 12.6 milliseconds earlier; runner 2, 37.3 milliseconds earlier) and longer duration of gluteus medius activity (runner 1, 55.8 milliseconds longer; runner 2, 44.4 milliseconds longer). Runner 1 transferred reduced contralateral pelvic drop to step ascent, whereas runner 2 did not (contralateral pelvic drop baseline-postretraining difference: runner 1, 3.6° less; runner 2, 1.5° more; hip adduction baseline-postretraining difference: runner 1, 3.0° less; runner 2, 0.5° more). Both runners demonstrated earlier onset of gluteus medius activity during step ascent (baseline-postretraining difference: runner 1, 48.0 milliseconds earlier; runner 2, 28.3 milliseconds earlier), but only runner 1 demonstrated longer activation duration (runner 1, 25.0 milliseconds longer; runner 2, 69.4 milliseconds shorter).
DISCUSSION:
While changes in hip mechanics and gluteus medius activity during running were consistent with those noted during step ascent for runner 1, runner 2 failed to demonstrate similar consistency between the tasks. Earlier onset and longer duration of gluteus medius activity may have been necessary to alter step mechanics for runner 2.
LEVEL OF EVIDENCE:
Therapy, level 4.
NOTE: This is a non-final version of an article published in final form in Willy, R. W., & Davis, I. S. (2013). Varied response to mirror gait retraining of gluteus medius control, hip kinematics, pain, and function in 2 female runners with patellofemoral pain. The Journal of Orthopaedic and Sports Physical Therapy, 43(12), 864-874. doi:10.2519/jospt.2013.4516
2014-01-31T21:31:58Z
2014-01-31T21:31:58Z
2013-12
Article
The Journal of Orthopaedic and Sports Physical Therapy; 43:12 p. 864-874
http://hdl.handle.net/10342/4352
24175611
10.2519/jospt.2013.4516
en_US
http://www.jospt.org/
oai:TheScholarship.intra.ecu.edu:10342/42762021-03-03T20:52:12Zcom_10342_107com_10342_73col_10342_113
2013-10-15T17:41:29Z
urn:hdl:10342/4276
Comparison of Stance Phase Knee Joint Angles and Moments Using Two Different Surface Marker Representations of the Proximal Shank in Walkers and Runners
Willson, John D.
Petit, Daniel J.
Barrios, Joaquin A.
Kinematics
Kinetics
Gait model
Marker sets
Efforts to compare different surface marker configurations in 3-dimensional motion analysis are warranted as more complex and custom marker sets become more common. At the knee, different markers can been used to represent the proximal shank. Often, two anatomical markers are placed over the femoral condyles, with their midpoint defining both the distal thigh and proximal shank segment ends. However, two additional markers placed over the tibial plateaus have been used to define the proximal shank end. For this experiment, simultaneous data for both proximal shank configurations were independently collected at two separate laboratories by different investigators, with one lab capturing a walking population and the other a running population. Common discrete knee joint variables were then compared between marker sets in each population. Using the augmented marker set, peak knee flexion after weight acceptance was less (1.2-1.7°, p<0.02) and peak knee adduction was greater (0.7-1.4°, p<0.001) in both data sets. Similarly, the calculated peak knee flexion moment was less by 15-20% and internal rotation moment was greater by 11-18% (p<0.001). These results suggest that the calculation of knee joint mechanics are influenced by the proximal shank’s segment endpoint definition, independent of dynamic task, investigator, laboratory environment, and population in this study.
2013-10-15T17:41:29Z
2013-10-15T17:41:29Z
2013
Article
Journal of Applied Biomechanics; 30:1 p. 173-178
http://hdl.handle.net/10342/4276
23878266
10.1123/jab.2012-0147
en_US
oai:TheScholarship.intra.ecu.edu:10342/113112022-09-27T07:16:30Zcom_10342_107com_10342_73col_10342_113
2022-09-26T12:26:03Z
urn:hdl:10342/11311
Transfection and Activation of CofActor, a Light and Stress Gated Optogenetic Tool, in Primary Hippocampal Neuron Cultures
Bunner, Wyatt P.
Dodson, Rachel
Szatmari, Erzsebet M.
Hughes, Robert M.
Cofilin-actin rods
Cytoskeletal dysregulation
Neurodegeneration
2022-09-26T12:26:03Z
2022-09-26T12:26:03Z
2021
Article
2331-8325
http://hdl.handle.net/10342/11311
10.21769/bioprotoc.3990
en_US
oai:TheScholarship.intra.ecu.edu:10342/42782021-03-03T20:52:12Zcom_10342_107com_10342_73col_10342_113
2013-10-15T19:05:33Z
urn:hdl:10342/4278
Lower Extremity Strength and Mechanics During Jumping in Women With Patellofemoral Pain
Willson, John D.
Davis, Irene S.
Anterior knee pain
Hip
Kinematics
Kinetics
Patella
Context: Lower extremity (LE) weakness might be associated with altered mechanics during weight bearing in subjects with patellofemoral pain syndrome (PFPS). Objective: To analyze LE strength, mechanics, and the association between these variables among women with and without PFPS during a simulated athletic task. Design: Case control. Setting: Motion-analysis laboratory. Subjects: 20 women with PFPS and 20 healthy women. Main Outcome Measures: Peak isometric lateral trunk-flexion, hipabduction, hip external-rotation, knee-flexion, and knee-extension strength, as well as hip- and knee-joint excursions and angular impulses during single-leg jumps. Results: PFPS subjects produced less hip-abduction, hip external-rotation, and trunk lateral- flexion force than the control group. The PFPS group also demonstrated greater hipadduction excursion and hip-abduction impulses. The association between the strength measurements and LE mechanics was low. Conclusions: Women with PFPS demonstrate specific weaknesses and altered LE mechanics. Weakness is not, however, highly correlated with observed differences in mechanics. ABSTRACT FROM AUTHOR
2013-10-15T19:05:33Z
2013-10-15T19:05:33Z
2009
Article
Journal Of Sport Rehabilitation; 18:1 p. 76-90
http://hdl.handle.net/10342/4278
19321908
en_US
oai:TheScholarship.intra.ecu.edu:10342/43482021-03-03T20:53:38Zcom_10342_107com_10342_73col_10342_113
2014-01-31T21:31:32Z
urn:hdl:10342/4348
The Effect of a Hip Strengthening Program on Mechanics during Running and Single Leg Squatting
Willy, Richard W.
Davis, Irene S.
Biomechanics
Lower extremities
Hip
Knee
Running
STUDY DESIGN: Block randomized controlled trial. OBJECTIVES: To investigate whether a strengthening and movement education program, targeting the hip abductors and hip external rotators, alters hip mechanics during running and during a single-leg squat.
BACKGROUND:
Abnormal movement patterns during running and single-leg squatting have been associated with a number of running-related injuries in females. Therapeutic interventions for these aberrant movement patterns typically include hip strengthening. While these strengthening programs have been shown to improve symptoms, it is unknown if the underlying mechanics during functional movements is altered.
METHODS: Twenty healthy females with excessive hip adduction during running, as determined by instrumented gait analysis, were recruited. The runners were matched by age and running distance, and randomized to either a training group or a control group. The training group completed a hip strengthening and movement education program 3 times per week for 6 weeks in addition to single-leg squat training with neuromuscular reeducation consisting of mirror and verbal feedback on proper mechanics. The control group did not receive an intervention but maintained the current running distance. Using a handheld dynamometer and standard motion capture procedures, hip strength and running and single-leg squat mechanics were compared before and after the strengthening and movement education program. RESULTS: While hip abductor and external rotation strength increased significantly (P<.005) in the training group, there were no significant changes in hip or knee mechanics during running. However, during the single-leg squat, hip adduction, hip internal rotation, and contralateral pelvic drop all decreased significantly (P = .006, P = .006, and P = .02, respectively). The control group exhibited no changes in hip strength, nor in the single-leg squat or running mechanics at the conclusion of the 6-week study. CONCLUSION: A training program that included hip strengthening and movement training specific to single-leg squatting did not alter running mechanics but did improve single-leg squat mechanics. These results suggest that hip strengthening and movement training, when not specific to running, do not alter abnormal running mechanics. LEVEL OF EVIDENCE: Therapy, level 2b. NOTE: This is not the final published version. The final version was published in the Journal of Orthopaedic and Sports Physical Therapy. 2011 Sep; 41(9): 625-32. doi: 10.2519/jospt.2011.3470
2014-01-31T21:31:32Z
2014-01-31T21:31:32Z
2011-07
Article
The Journal of Orthopaedic and Sports Physical Therapy; 41:9 p. 625-632
05-10-3470-RR.R1
http://hdl.handle.net/10342/4348
21765220
10.2519/jospt.2011.3470
en_US
http://www.jospt.org/doi/pdf/10.2519/jospt.2011.3470