Relationship between hip and core strength and frontal plane alignment during a single leg squat

Stickler, Laurie; Finley, Margaret; Gulgin, Heather

doi:10.1016/j.ptsp.2014.05.002

Cited by 110 publications

(102 citation statements)

References 29 publications

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“…A preliminary study showed that quadriceps and hamstrings strength had little correlation with side hop performance32 ) . Previous relevant studies reported a negative correlation between extensor and abductor strengths of the hip and valgus angle of the knee during various tasks16,17,18, 33 ) . The present study has shown that hip ROM can be a factor that influences knee motion during side hop.…”

Section: Discussionmentioning

confidence: 91%

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Correlation between hip function and knee kinematics evaluated by three-dimensional motion analysis during lateral and medial side-hopping

et al. 2016

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[Purpose] Kinematic and kinetic characteristics of the limb during side-hopping and hip/knee interaction during this motion have not been clarified. The purposes of this study were to examine the biomechanical parameters of the knee during side hop and analyze its relationship with clinical measurements of hip function. [Subjects and Methods] Eleven male college rugby players were included. A three-dimensional motion analysis system was used to assess motion characteristics of the knee during side hop. In addition, hip range of motion and muscle strength were evaluated. Subsequently, the relationship between knee motion and the clinical parameters of the hip was analyzed. [Results] In the lateral touchdown phase, the knee was positioned in an abducted and externally rotated position, and increasing abduction moment was applied to the knee. An analysis of the interaction between knee motion and hip function showed that range of motion for hip internal rotation was significantly correlated with external rotation angle and external rotation/abduction moments of the knee during the lateral touchdown phase. [Conclusion] Range of motion for hip internal rotation should be taken into consideration for identifying the biomechanical characteristics in the side hop test results.

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Section: Discussionmentioning

confidence: 91%

“…In these studies, weaknesses of the hip abductor, external rotator, and extensor were depicted as risk factors inducing dynamic frontal knee motion13,14,15 ) . However, no analytical data are available regarding the hip/knee interaction during side-hopping16,17,18,19 ) .…”

Section: Introductionmentioning

confidence: 99%

Correlation between hip function and knee kinematics evaluated by three-dimensional motion analysis during lateral and medial side-hopping

et al. 2016

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“…[30][31][32][33] In single-leg tasks individuals with weak hip abductors lean towards the stance limb to reduce the demand on the abductors. 34,35 The lateral lean in the SLS and pitching may occur as a compensation strategy in pitchers with weak hip abductors.…”

Section: Discussionmentioning

confidence: 99%

Trunk Lean During a Single-Leg Squat Is Associated With Trunk Lean During Pitching

Plummer

Oliver

Powers

et al. 2018

Intl J Sports Phys Ther

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Background: Impaired trunk motion during pitching may be a risk factor for upper extremity injuries. Specifically, increased forces about the shoulder and elbow have been observed in pitchers with excessive contralateral trunk lean during pitching. Because of the difficulty in identifying abnormal trunk motions during a high-speed task such as pitching, a clinical screening test is needed to identify pitchers who have impaired trunk motion during pitching. Hypothesis/Purpose:The purpose of this study was to determine the relationship between the degree of lateral trunk lean during the single-leg squat and amount of trunk lean during pitching and if trunk lean during pitching can be predicted from lean during the single-leg squat.Study Design: Controlled Laboratory Study; Cross-sectional.Methods: Seventy-three young baseball pitchers (11.4 ± 1.7 years; 156.3 ± 11.9 cm; 50.5 ± 8.8 kg) participated. An electromagnetic tracking system was used to obtain trunk kinematic data during a single-leg squat task (lead leg) and at maximum shoulder external rotation of a fastball pitch. Pearson correlation coefficients for trunk lean during the single-leg squat and pitching were calculated. A linear regression analysis was performed to determine if trunk lean during pitching can be predicted from lean during the single-leg squat.Results: There was a positive correlation between trunk lean during the single-leg squat and trunk lean during pitching (r= 0.53; p<0.001). Lateral trunk lean during the single-leg squat predicted the amount of lateral trunk lean during pitching (R 2 = 0.28; p< 0.001).Conclusions: A moderate positive correlation was observed between trunk lean during an SLS and pitching. Trunk lean during the single-leg squat explained 28% of the variance in trunk lean during pitching. Level of Evidence: Diagnosis, level 3

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“…Right n = 18 Left n = 2 Role Administrative Officers n = 5, Aircraft Technicians n = 4, Doctors n = 2, Nurses n = 6, Physical Training Instructors n = 3 single leg decline squat (SLDS) were developed. Participants were instructed for SLS and SLDS to squat to 60°knee flexion using metronome pacing over a 4 s cycle [7,13]. The non-stance leg was flexed at the knee to 90° [7].…”

Section: Clinical Rating Criteria Kinematic Interpretation For Objectmentioning

confidence: 99%

“…A reduction in peak knee valgus (ES = 0.5 p = 0.051) has been associated with a larger reduction in valgus abduction moment (ES = 0.71, P = 0.03) after four weeks neuromuscular training [11]. Knee valgus alignment on single leg squats has also been associated with other trainable deficits such as reduced flexibility [12] and strength [13]. These modifiable risk factors are amenable to physical therapy that could result in improved outcomes.…”

Section: Introductionmentioning

confidence: 99%

Single leg squat ratings by clinicians are reliable and predict excessive hip internal rotation moment

Barker-Davies

Roberts²,

Bennett

et al. 2018

Gait & Posture

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Relationship between hip and core strength and frontal plane alignment during a single leg squat

Cited by 110 publications

References 29 publications

Correlation between hip function and knee kinematics evaluated by three-dimensional motion analysis during lateral and medial side-hopping

Correlation between hip function and knee kinematics evaluated by three-dimensional motion analysis during lateral and medial side-hopping

Trunk Lean During a Single-Leg Squat Is Associated With Trunk Lean During Pitching

Single leg squat ratings by clinicians are reliable and predict excessive hip internal rotation moment

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