scholarly journals Effects of task and hip-abductor fatigue on lower limb alignment and muscle activation

2021 ◽  
Author(s):  
Rodrigo Rabello ◽  
Camila Nodari ◽  
Felipe Scudiero ◽  
Iury Borges ◽  
Luan Fitarelli ◽  
...  
Keyword(s):  
Lower Limb ◽  
Repeated Measures ◽  
Muscle Activation ◽  
Frontal Plane ◽  
Gluteus Medius ◽  
Limb Alignment ◽  
Lower Limb Alignment ◽  
Before And After ◽  
Hip Abduction ◽  
Hip Abductor

Abstract Purpose Fatigue-induced hip-abductor weakness may exacerbate lower-limb misalignments during different dynamic single-leg tasks. We sought to evaluate the effects of fatigue and task on lower limb kinematics and muscle activation and to find associations between measurements obtained in two tasks. Methods One-group pretest–posttest design. Seventeen healthy adults (9 W) performed the single-leg squat (SLSQUAT) and the single-leg hop (SLHOP) before and after a hip-abduction fatigue protocol. Hip adduction, knee frontal plane projection angle (knee FPPA) and heel inversion displacement were measured during the eccentric phase of the SLSQUAT and the SLHOP, as well as activation of the gluteus medius (GMed), tensor fascia latae (TFL), peroneus longus (PER) and tibialis anterior (TA). Moments and tasks were compared using a repeated-measures two-way ANOVA. Correlation between tasks was evaluated using Spearman’s correlation. Results No differences in kinematics or activation were found between moments. Hip-adduction displacement (P = 0.005), GMed (P = 0.008) and PER (P = 0.037) activation were higher during SLSQUAT, while TA activation was higher during SLHOP (P < 0.001). No differences were found between tasks in knee FPPA and heel inversion. Hip-adduction and knee FPPA were not correlated between tasks, while ankle inversion displacement was positively correlated (rs = 0.524–0.746). Conclusion Different characteristics of SLSQUAT (slower and deeper) seem to have led to increased hip adduction displacement, GMed, and PER activation and decreased TA activation, likely due to higher balance requirements. However, hip-abductor fatigue didn’t influence lower-limb alignment during the tasks. Finally, evaluations should be performed with different single-leg tasks since they don’t give the same lower-limb alignment information.

scholarly journals Effects of Log Rolling Position on Hip Abductor Muscles Activity During Side-Lying Hip Abduction Exercise in Participants with Gluteus Medius Weakness

2020 ◽  
Author(s):  
Seung-min Baik ◽  
Heon-seock Cynn ◽  
Jae-hun Shim ◽  
Ji-hyun Lee ◽  
A-reum Shin ◽  
...  
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Statistical Significance ◽  
Frontal Plane ◽  
Gluteus Maximus ◽  
Gluteus Medius ◽  
Neutral Position ◽  
Hip Abduction ◽  
Hip Abductor ◽  
Tensor Fasciae Latae

Abstract Context: Weakness of the gluteus medius and the gluteus maximus is associated with a variety of musculoskeletal disorders. However, activation of synergist muscles that are not targeted should be considered when prescribing side-lying hip abduction (SHA) exercises. Log-rolling positions may affect hip abductors activity during SHA. Objectives: To determine the effects of log-rolling positions on the gluteus medius, the gluteus maximus, and the tensor fasciae latae activity during SHA in participants with gluteus medius weakness. Design: The effects of different log-rolling positions on hip abductor activity during SHA were analyzed by one-way repeated-measures analysis of variance. Setting: University research laboratory. Participants: Twenty-one participants with gluteus medius weakness were recruited. Interventions: Three types of SHA were performed: SHA in the frontal plane with a neutral position (SHA-neutral), SHA in the frontal plane with an anterior log-rolling position (SHA-anterior rolling), and SHA in the frontal plane with a posterior log-rolling position (SHA-posterior rolling). Main Outcome Measures: Surface electromyography was used to measure the hip abductor activity. One-way repeated-measure analysis of variance was used to assess the statistical significance of the muscle activity. Results: SHA-anterior rolling showed significantly greater gluteus medius and gluteus maximus activation than SHA-neutral (P = .003 and P &lt; .001, respectively) and SHA-posterior rolling (P &lt; .001 and P &lt; .001, respectively). SHA-neutral showed significantly greater gluteus medius and gluteus maximus activation than SHA-posterior rolling (P &lt; .001 and P = .001, respectively). SHA-anterior rolling showed significantly less tensor fasciae latae activation than SHA-neutral (P &lt; .001) and SHA-posterior rolling (P &lt; .001). SHA-neutral showed significantly less tensor fasciae latae activation than SHA-posterior rolling (P &lt; .001). Conclusion: SHA-anterior rolling may be an effective exercise to increase activation of the gluteus medius and the gluteus maximus while decreasing the tensor fasciae latae in participants with gluteus medius weakness.

scholarly journals Gluteus Medius Muscle Activation During Isometric Muscle Contractions

2011 ◽  
Vol 20 (2) ◽  
pp. 174-186 ◽  
Author(s):  
Catriona O’Dwyer ◽  
David Sainsbury ◽  
Kieran O’Sullivan
Keyword(s):  
Internal Rotation ◽  
Outcome Measures ◽  
Lower Limb ◽  
Repeated Measures ◽  
Muscle Activation ◽  
External Rotation ◽  
Gluteus Medius ◽  
Isometric Contractions ◽  
Main Effect

Context:Functional subdivisions are proposed to exist in the gluteus medius (GM) muscle. Dysfunction of the GM, in particular its functional subdivisions, is commonly implicated in lower limb pathologies. However, there is a lack of empirical evidence examining the role of the subdivisions of the GM.Objectives:To compare the activation of the functional subdivisions of the GM (anterior, middle, and posterior) during isometric hip contractions.Design:Single-session, repeated-measures observational study.Setting:University research laboratory.Participants:Convenience sample of 15 healthy, pain-free subjects.Intervention:Subjects performed 3 maximal voluntary isometric contractions for hip abduction and internal and external rotation on an isokinetic dynamometer with simultaneous recording of surface electromyography (sEMG) activity of the GM subdivisions.Main Outcome Measures:sEMG muscle activity for each functional subdivision of the GM during each hip movement was analyzed using a 1-way repeated-measures ANOVA (post hoc Bonferroni).Results:The response of GM subdivisions during the 3 different isometric contractions was significantly different (interaction effect; P = .003). The anterior GM displayed significantly higher activation across all 3 isometric contractions than the middle and posterior subdivisions (main effect; both P < .001). The middle GM also demonstrated significantly higher activation than the posterior GM across all 3 isometric contractions (main effect; P = .027). There was also significantly higher activation of all 3 subdivisions during both abduction and internal rotation than during external rotation (main effect; both P < .001).Conclusions:The existence of functional subdivisions in the GM appears to be supported by the findings. Muscle activation was not homogeneous throughout the entire muscle. The highest GM activation was found in the anterior GM subdivision and during abduction and internal rotation. Future studies should examine the role of GM functional subdivisions in subjects with lower limb pathologies.

Effects of Different Hip Rotations on Gluteus Medius and Tensor Fasciae Latae Muscle Activity During Isometric Side-Lying Hip Abduction

2013 ◽  
Vol 22 (4) ◽  
pp. 301-307 ◽  
Author(s):  
Ji-hyun Lee ◽  
Heon-seock Cynn ◽  
Sil-ah Choi ◽  
Tae-lim Yoon ◽  
Hyo-jung Jeong
Keyword(s):  
Outcome Measures ◽  
Analysis Of Variance ◽  
Muscle Activity ◽  
Repeated Measures ◽  
Muscle Activation ◽  
Activity Ratio ◽  
Gluteus Medius ◽  
Repeated Measures Analysis ◽  
Hip Abduction ◽  
Tensor Fasciae Latae

Context:Gluteus medius (Gmed) weakness is associated with some lower-extremity injuries. People with Gmed weakness might compensate by activating the tensor fasciae latae (TFL). Different hip rotations in the transverse plane may affect Gmed and TFL muscle activity during isometric side-lying hip abduction (SHA).Objectives:To compare Gmed and TFL muscle activity and the Gmed:TFL muscle-activity ratio during SHA exercise with 3 different hip rotations.Design:The effects of different hip rotations on Gmed, TFL, and the Gmed:TFL muscle-activity ratio during isometric SHA were analyzed with 1-way, repeated-measures analysis of variance.Setting:University research laboratory.Participants:20 healthy university students were recruited in this study.Interventions:Participants performed isometric SHA: frontal SHA with neutral hip (frontal SHAN), frontal SHA with hip medial rotation (frontal SHA-MR), and frontal SHA with hip lateral rotation (frontal SHA-LR).Main Outcome Measures:Surface electromyography measured the activity of the Gmed and the TFL. A 1-way repeated-measures analysis of variance assessed the statistical significance of Gmed and TFL muscle activity. When there was a significant difference, a Bonferroni adjustment was performed.Results:Frontal SHA-MR showed significantly greater Gmed muscle activation than frontal SHA-N (P = .000) or frontal SHA-LR (P = .015). Frontal SHA-LR showed significantly greater TFL muscle activation than frontal SHA-N (P = .002). Frontal SHA-MR also resulted in a significantly greater Gmed:TFL muscle-activity ratio than frontal SHA-N (P = .004) or frontal SHA-LR (P = .000), and frontal SHA-N was significantly greater than frontal SHA-LR (P = .000).Conclusions:Frontal SHA-MR results in greater Gmed muscle activation and a higher Gmed:TFL muscle ratio.

EFFECTS OF DYNAMIC BIKE FITTING BY LOWER LIMB ALIGNMENT ON PEDALING PERFORMANCE

2018 ◽  
Vol 18 (08) ◽  
pp. 1840039
Author(s):  
JIN SEUNG CHOI ◽  
JEONG WOO SEO ◽  
JIN SOO LEE ◽  
JUNGGIL KIM ◽  
GYE RAE TACK
Keyword(s):  
Lower Limb ◽  
Vertical Alignment ◽  
Limb Alignment ◽  
Long Distance ◽  
Lower Limb Alignment ◽  
Lateral Direction ◽  
National Team ◽  
Before And After ◽  
Preliminary Study ◽  
Positive Effect

In this study, the effect of the dynamic bike fitting, which was defined as lower limb vertical alignment by inserted wedges, was evaluated. Twelve non-cyclists are participated in this experiment. For comparing pedaling performance between before and after fitting, sub-maximal pedaling tests were conducted for 2 min. The results showed that both the range of motion of the knee joint (medio-lateral direction) which represented pedaling trajectory and the coefficient of variance of pedaling power were decreased in non-cyclists. This result indicated that the dynamic fitting had a positive effect such as increased pedaling kinematic stability and kinetic efficiency on pedaling performance. Supplementary pedaling test was performed by one of the best cyclist, who was a member of the national team and a middle and long distance cyclist. The result of the cyclist test was also similar to the patterns of 12 non-cyclists. It is believed that this study has the meaning of the preliminary study to evaluate the effects of the dynamic fitting. Further study is necessary to evaluate the effects of the fitting through enough subjects and repeated tests by measuring muscle activities and forces.

Measures of frontal plane lower limb alignment obtained from static radiographs and dynamic gait analysis

2008 ◽  
Vol 27 (4) ◽  
pp. 635-640 ◽  
Author(s):  
Michael A. Hunt ◽  
Trevor B. Birmingham ◽  
Thomas R. Jenkyn ◽  
J. Robert Giffin ◽  
Ian C. Jones
Keyword(s):  
Gait Analysis ◽  
Lower Limb ◽  
Frontal Plane ◽  
Limb Alignment ◽  
Lower Limb Alignment ◽  
Dynamic Gait
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