The Effect of Hip Abductor Muscle Fatigue on Frontal Plane Knee Projection Angle During Step Landing

2014 ◽  
Vol 19 (4) ◽  
pp. 38-43
Author(s):  
Lee Herrington
Keyword(s):  
Muscle Fatigue ◽  
Outcome Measures ◽  
Frontal Plane ◽  
Initial Contact ◽  
Knee Valgus ◽  
Joint Mechanics ◽  
Abductor Muscle ◽  
Valgus Angle ◽  
Hip Abductor ◽  
Projection Angle

Context:A number of acute and overuse knee pathologies share a mechanism involving a poor dynamic alignment of the limb creating increased stress in the tissues. Inappropriate execution of a correct strategy during landing has been suggested to involve insufficient activity of the hip abductor and external rotator muscles. Limited data describing the relationships between hip-abductor muscle fatigue and hip/knee joint mechanics exists.Objective:To investigate the effect of fatigue of the hip abductor muscles on knee valgus angle.Design:Repeated measures.Participants:30 asymptomatic subjects: 15 female (age 20.4 ± 1.4, range 18–26 years; height 1.66 m, range 1.60–1.76 m; weight 63.9 kg, range 58–68 kg) and 15 male subjects (age 22 ± 3.2, range 18–28 years; height 1.84 m, range 1.65–1.90 m; weight 82.1 kg, range 69–93 kg).Main outcome Measures:Knee valgus (frontal plane projection) angle was assessed during a step landing task before and following a fatiguing protocol of the hip abductor muscles involving repeated 10 s maximal isometric contractions of the hip abductor muscles, until strength was recorded as 50% of preintervention score.Results:Males showed no significant change in knee valgus angle at initial ground contact (p = .9 ES 0.1) or in maximum knee valgus (p = .64 ES 0.5) following the fatiguing. Females showed a significant increase in maximum knee valgus angle following the fatiguing (p = .0018 ES 1.0), though the knee valgus angle at initial contact was not changed (p = .12 ES 0.67). They also demonstrated a significant increase in the change in knee valgus angle between initial contact and maximum following the fatiguing (p = .0004 ES 0.88).Conclusion:Females appear more susceptible to the effects of hip muscle fatigue, leading to a detrimental change in landing kinematics which may then predispose them to knee injury.

Sex Differences in Eccentric Hip-Abductor Strength and Knee-Joint Kinematics When Landing from a Jump

2005 ◽  
Vol 14 (4) ◽  
pp. 346-355 ◽  
Author(s):  
Cale Jacobs ◽  
Carl Mattacola
Keyword(s):  
Sex Differences ◽  
Knee Joint ◽  
Outcome Measures ◽  
Peak Torque ◽  
Knee Valgus ◽  
Valgus Angle ◽  
Peak Knee ◽  
Knee Joint Kinematics ◽  
Hip Abductor ◽  
Abductor Strength

Context:Decelerating movements such as landing from a jump have been proposed to be a common mechanism of injury to the anterior cruciate ligament (ACL).Objective:To compare eccentric hip-abductor strength and kinematics of landing between men and women when performing a hopping task.Setting:Research laboratory.Patients:18 healthy subjects (10 women, 8 men).Main Outcome Measures:Eccentric peak torque of the hip abductors and peak knee-joint angles during a 350-millisecond interval after impact.Results:No significant sex differences were present, but there was a significant inverse relationship between women's eccentric peak torque and peak knee-valgus angle (r= –.61,P= .03).Conclusions:Women with larger eccentric peak torque demonstrated lower peak knee-valgus angles. By not reaching as large of a valgus angle, there is potentially less stress on the ACL. Increasing eccentric hip-abductor strength might improve knee-joint kinematics during landing from a jump.

The Relationship Between Hip-Abductor Strength and the Magnitude of Pelvic Drop in Patients With Low Back Pain

2010 ◽  
Vol 19 (4) ◽  
pp. 422-435 ◽  
Author(s):  
Karen D. Kendall ◽  
Christie Schmidt ◽  
Reed Ferber
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Outcome Measures ◽  
Load Transfer ◽  
Frontal Plane ◽  
Low Back ◽  
Secondary Purpose ◽  
Quasi Experimental ◽  
Hip Abductor ◽  
The Relationship

Context:It has been theorized that a positive Trendelenburg test (TT) indicates weakness of the stance hip-abductor (HABD) musculature, results in contralateral pelvic drop, and represents impaired load transfer, which may contribute to low back pain. Few studies have tested whether weakness of the HABDs is directly related to the magnitude of pelvic drop (MPD).Objective:To examine the relationship between HABD strength and MPD during the static TT and during walking for patients with nonspecific low back pain (NSLBP) and healthy controls (CON). A secondary purpose was to examine this relationship in NSLBP after a 3-wk HABD-strengthening program.Design:Quasi-experimental.Setting:Clinical research laboratory.Participants:20 (10 NSLBP and 10 CON).Intervention:HABD strengthening.Main Outcome Measures:Normalized HABD strength, MPD during TT, and maximal pelvic frontal-plane excursion during walking.Results:At baseline, the NSLBP subjects were significantly weaker (31%; P = .03) than CON. No differences in maximal pelvic frontal-plane excursion (P = .72), right MPD (P = 1.00), or left MPD (P = .40) were measured between groups. During the static TT, nonsignificant correlations were found between left HABD strength and right MPD for NSLBP (r = −.32, P = .36) and CON (r = −.24, P = .48) and between right HABD strength and left MPD for NSLBP (r = −.24, P = .50) and CON (r = −.41, P = .22). Nonsignificant correlations were found between HABD strength and maximal pelvic frontal-plane excursion for NSLBP (r = −.04, P = .90) and CON (r = −.14, P = .68). After strengthening, NSLBP demonstrated significant increases in HABD strength (12%; P = .02), 48% reduction in pain, and no differences in MPD during static TT and maximal pelvic frontal-plane excursion compared with baseline.Conclusions:HABD strength was poorly correlated to MPD during the static TT and during walking in CON and NSLBP. The results suggest that HABD strength may not be the only contributing factor in controlling pelvic stability, and the static TT has limited use as a measure of HABD function.

scholarly journals Effects of hip abductor muscle fatigue on gait control and hip position sense in healthy older adults

2015 ◽  
Vol 42 (4) ◽  
pp. 545-549 ◽  
Author(s):  
Mina Arvin ◽  
Marco J.M. Hoozemans ◽  
Bart J. Burger ◽  
Sietse M. Rispens ◽  
Sabine M.P. Verschueren ◽  
...  
Keyword(s):  
Older Adults ◽  
Muscle Fatigue ◽  
Position Sense ◽  
Abductor Muscle ◽  
Gait Control ◽  
Healthy Older Adults ◽  
Hip Abductor

Hip-Abductor Fatigue, Frontal-Plane Landing Angle, and Excursion during a Drop Jump

2005 ◽  
Vol 14 (4) ◽  
pp. 321-331 ◽  
Author(s):  
Christopher Carcia ◽  
Jim Eggen ◽  
Sandra Shultz
Keyword(s):  
Outcome Measures ◽  
Cruciate Ligament ◽  
Reaction Force ◽  
Frontal Plane ◽  
Muscle Performance ◽  
Drop Jump ◽  
Vertical Ground Reaction Force ◽  
Fatigue Protocol ◽  
Hip Muscle ◽  
Hip Abductor

Context:The influence of hip-muscle function on knee-joint kinematics during landing has been inadequately investigated.Objective:To determine the effect of bilateral hip-abductor fatigue on frontal-plane tibiofemoral landing characteristics and vertical ground-reaction force (vGRF) during the landing phase of a drop jump.Design:Experimental, pretest–posttest.Setting:Research laboratory.Participants:20 recreationally active college-age students.Intervention:Isometric bilateral hip-abductor-fatigue protocol.Main Outcome Measures:Frontal-plane tibiofemoral landing angle, excursion, and vGRF during landing from a drop jump under prefatigue, postfatigue, and recovery conditions.Results:After the fatigue protocol, participants landed in a greater valgus orientation than in the prefatigued state. No differences in frontal-plane excursion or vGRF were noted.Conclusions:Isolated bilateral hip-abductor fatigue alters frontal-plane lower extremity orientation during a double-leg landing. Because an increase in valgus orientation has been observed at or near the time of noncontact anterior cruciate ligament injuries, we recommend improving hip-abductor muscle performance to lessen the risk of such injuries.

scholarly journals Investigating the landing kinetics factors and preparatory knee muscle activation in female handball players with and without dynamic knee valgus while performing single leg landing

2021 ◽  
Vol 13 (1) ◽  
pp. 155-162
Author(s):  
Reyhaneh Mansouri ◽  
Fariba Bahrami ◽  
Reza Rajabi ◽  
Hooman Minoonejad ◽  
Katarzyna Kaczmarczyk
Keyword(s):  
Muscle Activation ◽  
Center Of Pressure ◽  
Reaction Force ◽  
Knee Injuries ◽  
Surface Emg ◽  
Whole Body ◽  
Initial Contact ◽  
Knee Valgus ◽  
Vertical Ground Reaction Force ◽  
Valgus Angle

Abstract Study aim: to examine the differences in landing kinetics factors (LKF) to assess the whole body stability and preparatory muscle activation (PMA) in female handball players with and without dynamic knee valgus. Material and methods: Twenty-four professional female handball players (11 with (DKV) and 13 without (Control) dynamic knee valgus) were asked to perform three trials of a single-leg landing. LKF and surface EMG were recorded. Initial contact knee valgus angle (IC KVA), vertical ground reaction force (vGRF), confidence ellipse area of center of pressure (CEA), time to stability (TTS) and EMG from 100 ms prior to ground contact were used in the data analyses. Results: Multivariate analyzing of LKF showed significant differences between two groups (p = 0.001) while for PMA the result was not significant (p = 0.361). Conclusion: Altered landing mechanism considered as a predictor of non-contact knee injuries such as ACL rupture. Therefore according to current study it seems important to focus on reducing valgus angle in designing injury prevention program.

Effect of a SERF Strap on Pain and Knee-Valgus Angle During Unilateral Squat and Step Landing in Patellofemoral Patients

2013 ◽  
Vol 22 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Lee Herrington
Keyword(s):  
Outcome Measures ◽  
Repeated Measures ◽  
Joint Pain ◽  
Patellofemoral Joint ◽  
Human Performance ◽  
Knee Valgus ◽  
Valgus Angle ◽  
Smallest Detectable Difference ◽  
The Difference ◽  
The Impact

Context:A valgus position of the knee on functional loading tasks has been reported to be associated with patellofemoral-joint pain. Training programs to reduce knee valgus have been shown to be effective but take time. It would appear logical to use a brace or strap to help control this knee motion to reduce symptoms.Objective:To assess the impact of the SERF strap on knee valgus and patellofemoral-joint pain.Design:Repeated measures.Setting:University human performance laboratory.Participants:12 women with patellofemoral pain (mean age 24 ± 3.2 y).Intervention:Application of SERF strap.Main Outcome Measures:Knee-valgus angle on single-leg squat and step landing and visual analog scale pain score.Results:The application of the SERF brace significantly reduced the pain (P < .04) and knee valgus (P < .034) during both tasks.Conclusion:The SERF brace brings about a significant reduction in pain during functional tasks. Although the brace brought about a significant reduction in knee valgus, this failed to exceed the smallest-detectable-difference value, so the difference is likely to be related to measurement error. The mechanism as to why this the reduction in pain occurs therefore remains unclear, as this study in line with many others failed to demonstrate meaningful changes in kinematics that could provide an obvious explanation.

scholarly journals Effect of Hip Abductor Muscle Fatigue on Static and Dynamic Balance in Elderly Women

Salmand ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 322-329
Author(s):  
Farideh Babakhani ◽  
Kobra Oladghobadi ◽  
Farajollah Fatahi
Keyword(s):  
Muscle Fatigue ◽  
Elderly Women ◽  
Dynamic Balance ◽  
Abductor Muscle ◽  
Hip Abductor
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