Modulation of Frontal-Plane Knee Kinematics by Hip-Extensor Strength and Gluteus Maximus Recruitment During a Jump-Landing Task in Healthy Women

2013 ◽  
Vol 22 (3) ◽  
pp. 184-190 ◽  
Author(s):  
John H. Hollman ◽  
Jeffrey M. Hohl ◽  
Jordan L. Kraft ◽  
Jeffrey D. Strauss ◽  
Katie J. Traver
Keyword(s):  
Outcome Measures ◽  
Weight Bearing ◽  
Three Dimensional ◽  
Knee Kinematics ◽  
Frontal Plane ◽  
Gluteus Maximus ◽  
Neuromuscular Control ◽  
Knee Motion ◽  
Jump Landing ◽  
Hip Motion

Context:Abnormal lower extremity kinematics during dynamic activities may be influenced by impaired gluteus maximus function.Objective:To examine whether hip-extensor strength and gluteus maximus recruitment are associated with dynamic frontal-plane knee motion during a jump-landing task.Design:Exploratory study.Setting:Biomechanics laboratory.Participants:40 healthy female volunteers.Main Outcome Measures:Isometric hip-extension strength was measured bilaterally with a handheld dynamometer. Three-dimensional hip and knee kinematics and gluteus maximus electromyography data were collected bilaterally during a jumplanding test. Data were analyzed with hierarchical linear regression and partial correlation coefficients (α = .05).Results:Hip motion in the transverse plane was highly correlated with knee motion in the frontal plane (partial r = .724). After controlling for hip motion, reduced magnitudes of isometric hip-extensor strength (partial r = .470) and peak gluteus maximus recruitment (partial r = .277) were correlated with increased magnitudes of knee valgus during the jump-landing task.Conclusion:Hip-extensor strength and gluteus maximus recruitment, which represents a measure of the muscle’s neuromuscular control, are both associated with frontal-plane knee motions during a dynamic weight-bearing task.

scholarly journals A feasibility study of a novel, task-specific movement training intervention for women with patellofemoral pain

2017 ◽  
Vol 32 (2) ◽  
pp. 179-190 ◽  
Author(s):  
Gretchen B Salsich ◽  
Barbara Yemm ◽  
Karen Steger-May ◽  
Catherine E Lang ◽  
Linda R Van Dillen
Keyword(s):  
Weight Bearing ◽  
Knee Kinematics ◽  
Frontal Plane ◽  
Patellofemoral Pain ◽  
Patient Specific ◽  
Training Intervention ◽  
Specific Training ◽  
Intervention Effects ◽  
And Function ◽  
Treatment Credibility

Objective: To investigate whether a novel, task-specific training intervention that focused on correcting pain-producing movement patterns was feasible and whether it would improve hip and knee kinematics, pain, and function in women with patellofemoral pain. Design: Prospective, non-randomized, within-group, double baseline, feasibility intervention study. Subjects: A total of 25 women with patellofemoral pain were enrolled. Intervention: The intervention, delivered 2×/week for six weeks, consisted of supervised, high-repetition practice of daily weight-bearing and recreational activities. Activities were selected and progressed based on participants’ interest and ability to maintain optimal alignment without increasing pain. Main measures: Primary feasibility outcomes were recruitment, retention, adherence, and treatment credibility (Credibility/Expectancy Questionnaire). Secondary outcomes assessing intervention effects were hip and knee kinematics, pain (visual analog scale: current, average in past week, maximum in past week), and function (Patient-Specific Functional Scale). Results: A total of 25 participants were recruited and 23 were retained (92% retention). Self-reported average daily adherence was 79% and participants were able to perform their prescribed home program correctly (reduced hip and knee frontal plane angles) by the second intervention visit. On average, treatment credibility was rated 25 (out of 27) and expectancy was rated 22 (out of 27). Hip and knee kinematics, pain, and function improved following the intervention when compared to the control phase. Conclusion: Based on the feasibility outcomes and preliminary intervention effects, this task-specific training intervention warrants further investigation and should be evaluated in a larger, randomized clinical trial.

scholarly journals Individuals with medial knee osteoarthritis show neuromuscular adaptation when perturbed during walking despite functional and structural impairments

2014 ◽  
Vol 116 (1) ◽  
pp. 13-23 ◽  
Author(s):  
Deepak Kumar ◽  
Charles (Buz) Swanik ◽  
Darcy S. Reisman ◽  
Katherine S. Rudolph
Keyword(s):  
Knee Osteoarthritis ◽  
Muscle Activation ◽  
Weight Bearing ◽  
Joint Space Width ◽  
Neuromuscular Control ◽  
Emg Activity ◽  
Initial Contact ◽  
Knee Motion ◽  
Quadriceps Weakness ◽  
Knee Oa

Neuromuscular control relies on sensory feedback that influences responses to changing external demands, and the normal response is for movement and muscle activation patterns to adapt to repeated perturbations. People with knee osteoarthritis (OA) are known to have pain, quadriceps weakness, and neuromotor deficits that could affect adaption to external perturbations. The aim of this study was to analyze neuromotor adaptation during walking in people with knee OA ( n = 38) and controls ( n = 23). Disability, quadriceps strength, joint space width, malalignment, and proprioception were assessed. Kinematic and EMG data were collected during undisturbed walking and during perturbations that caused lateral translation of the foot at initial contact. Knee excursions and EMG magnitudes were analyzed. Subjects with OA walked with less knee motion and higher muscle activation and had greater pain, limitations in function, quadriceps weakness, and malalignment, but no difference was observed in proprioception. Both groups showed increased EMG and decreased knee motion in response to the first perturbation, followed by progressively decreased EMG activity and increased knee motion during midstance over the first five perturbations, but no group differences were observed. Over 30 trials, EMG levels returned to those of normal walking. The results illustrate that people with knee OA respond similarly to healthy individuals when exposed to challenging perturbations during functional weight-bearing activities despite structural, functional, and neuromotor impairments. Mechanisms underlying the adaptive response in people with knee OA need further study.

scholarly journals Arch Height and Maximum Rearfoot Eversion During Jogging in 2 Static Neutral Positions

2012 ◽  
Vol 47 (1) ◽  
pp. 83-90 ◽  
Author(s):  
Sae Yong Lee ◽  
Jay Hertel
Keyword(s):  
Internal Rotation ◽  
Plantar Flexion ◽  
Weight Bearing ◽  
Knee Kinematics ◽  
Frontal Plane ◽  
Neutral Position ◽  
Camera Motion ◽  
Arch Height ◽  
Navicular Drop ◽  
Rearfoot Eversion

Context: Clinically, lowering of the medial longitudinal arch is believed to be closely related to rearfoot eversion. However, the relationship between arch height and rearfoot eversion during gait is unclear. Objectives: (1) To examine the influence of 2 reference positions (weight-bearing neutral position [WBNP] and subtalar neutral position [STNP]) on maximum rearfoot eversion, tibial internal rotation, knee flexion, knee internal rotation, and dorsiflexion-plantar flexion of ankle joint measures during jogging and (2) to compare the relationships among static arch height, navicular drop, and the 2 maximum rearfoot eversion measures. Design: Crossover study. Setting: Gait laboratory. Patients or Other Participants: Thirty-three volunteers between 18 and 40 years of age. Intervention(s): Each participant stood on the treadmill in 2 static positions: WBNP and STNP. Kinematic data were obtained using a 10-camera motion analysis system (120 Hz) when participants jogged at 2.65 m/s on the treadmill in bare feet. Main Outcome Measure(s): Rearfoot and shank angular kinematics, navicular drop, and static arch height. Results: Maximum rearfoot eversion was greater (WBNP: 4.03° ± 2.58°, STNP: 10.91° ± 5.34°) when STNP was the static reference (P < .001). A strong correlation was seen between maximum STNP eversion and navicular drop (r = 0.842) but not between WBNP and navicular drop (r = 0.216). Differences were noted in dorsiflexion and knee kinematics during gait between the static references; however, the effect sizes were low, and the mean differences were smaller than 2°, which was less than 5% of total excursion during gait. Conclusions: Using STNP rather than WBNP as the reference position affects estimates of frontal-plane rearfoot movement but not other ankle or knee motions in jogging.

Gender and Foot Orthotic Device Effect on Frontal Plane Hip Motion During Landing From a Vertical Jump

2011 ◽  
Vol 27 (2) ◽  
pp. 130-136 ◽  
Author(s):  
Walter L. Jenkins ◽  
D.S. Williams ◽  
Brandon Bevil ◽  
Sara Stanley ◽  
Michael Blemker ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Vertical Jump ◽  
Three Dimensional ◽  
Frontal Plane ◽  
Foot Orthoses ◽  
Functional Activities ◽  
Hip Motion ◽  
Hip Kinematics ◽  
Biomechanical Effect ◽  
Foot Orthotic

Excessive hip motion has been linked to lower extremity pathology. Foot orthoses are commonly used to control motion within lower extremity joints when lower extremity pathology and dysfunction are present. Few studies have investigated the effect of foot orthoses on hip angular kinematics during functional activities. Eighteen females and 18 males performed a vertical jump with and without a prefabricated foot orthoses to determine the biomechanical effect of foot orthoses on hip kinematics when landing from a jump. Data collection included three-dimensional motion analysis of the lower extremity. Pairedttests were performed to determine if differences existed within genders with and without foot orthoses. At the hip joint, there was significantly less hip adduction motion in the foot orthoses condition as compared with the no foot orthoses condition in females (p< .05). There were no differences between foot orthoses conditions in males. Females appear to have a different proximal response to foot orthoses when landing from a forward jump than males.

Relationship Between Gluteal Muscle Strength, Corticospinal Excitability, and Jump-Landing Biomechanics in Healthy Women

2013 ◽  
Vol 22 (4) ◽  
pp. 239-247 ◽  
Author(s):  
Adam S. Lepley ◽  
Allison M. Strouse ◽  
Hayley M. Ericksen ◽  
Kate R. Pfile ◽  
Phillip A. Gribble ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Outcome Measures ◽  
Motor Evoked Potentials ◽  
Gluteus Maximus ◽  
Gluteus Medius ◽  
Corticospinal Excitability ◽  
Gluteal Muscle ◽  
Jump Landing ◽  
Healthy Women ◽  
Landing Biomechanics

Context:Components of gluteal neuromuscular function, such as strength and corticospinal excitability, could potentially influence alterations in lower extremity biomechanics during jump landing.Objective:To determine the relationship between gluteal muscle strength, gluteal corticospinal excitability, and jump-landing biomechanics in healthy women.Setting:University laboratory.Design:Descriptive laboratory study.Participants:37 healthy women (21.08 ± 2.15 y, 164.8 ± 5.9 cm, 65.4 ± 12.0 kg).Interventions:Bilateral gluteal strength was assessed through maximal voluntary isometric contractions (MVIC) using an isokinetic dynamometer. Strength was tested in the open chain in prone and side-lying positions for the gluteus maximus and gluteus medius muscles, respectively. Transcranial magnetic stimulation was used to elicit measures of corticospinal excitability. Participants then performed 3 trials of jump landing from a 30-cm box to a distance of 50% of their height, with an immediate rebound to a maximal vertical jump. Each jump-landing trial was video recorded (2-D) and later scored for errors.Main Outcome Measures:MVICs normalized to body mass were used to assess strength in the gluteal muscles of the dominant and nondominant limbs. Corticospinal excitability was assessed by means of active motor threshold (AMT) and motor-evoked potentials (MEP) elicited at 120% of AMT. The Landing Error Scoring System (LESS) was used to evaluate jump-landing biomechanics.Results:A moderate, positive correlation was found between dominant gluteus maximus MEP and LESS scores (r = .562, P = .029). No other significant correlations were observed for MVIC, AMT, or MEP for the gluteus maximus and gluteus medius, regardless of limb.Conclusions:The findings suggest a moderate relationship between dominant gluteus maximus corticospinal excitability and a clinical measure of jump-landing biomechanics. Further research is required to substantiate the findings and expand our understanding of the central nervous system’s role in athletic movement.

scholarly journals Are Core Stability Tests Related to Single Leg Squat Performance in Active Females?

2021 ◽  
Vol 18 (11) ◽  
pp. 5548
Author(s):  
Paloma Guillén-Rogel ◽  
David Barbado ◽  
Cristina Franco-Escudero ◽  
Cristina San Emeterio ◽  
Pedro J. Marín
Keyword(s):  
Weight Bearing ◽  
Frontal Plane ◽  
Neuromuscular Control ◽  
Smartphone Application ◽  
Ankle Dorsiflexion ◽  
Core Stability ◽  
Knee Valgus ◽  
Exercise Tests ◽  
Significant Difference ◽  
Single Leg Squat

Core stability (CS) deficits can have a significant impact on lower limb function. The aim of this study was to investigate the relationship between two dynamic core exercise assessments and dynamic knee valgus during single-leg squats. In total, 20 physically active female students participated in this study. The OCTOcore smartphone application assesses CS during two dynamic exercise tests, the partial range single-leg deadlift (SLD) test and the bird-dog (BD) test. A two-dimensional assessment of a single-leg squat test was used to quantify participants’ hip frontal angle (HFASLS) and knee frontal plane projection angle (FPPASLS). Ankle dorsiflexion was evaluated through the weight-bearing dorsiflexion test. The correlational analyses indicated that the HFASLS was significantly related to the partial range single-leg deadlift test (r = 0.314, p < 0.05) and ankle dorsiflexion (r = 0.322, p < 0.05). The results showed a significant difference (p < 0.05) in the CS test between cases categorised as dynamic knee valgus (>10°) and normal (≤10°). The CS deficit may influence the neuromuscular control of the lumbopelvic-hip complex during single-leg movements. The link between CS and kinematic factors related to knee injuries was only observed when CS was measured in the SLD test but not in the BD test.

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