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Lower-Extremity Muscle Activity, Kinematics, and Dynamic Postural Control in Individuals With Patellofemoral Pain.
J Sport Rehabil 2018; 27(6):505-512JS

Abstract

CONTEXT

Altered lower-extremity muscle activity has been associated with lower-extremity kinematics in individuals with patellofemoral pain (PFP). However, few studies have examined these relationships, and the results are inconsistent.

OBJECTIVE

To compare the lower-extremity muscle activity, kinematics, pain level, and reach distance during the anterior reach of the star excursion balance test (SEBT) between participants with PFP and healthy individuals (control [CON] group).

DESIGN

Case control.

SETTING

Research laboratory.

PARTICIPANTS

Twenty-eight (PFP = 14 and CON = 14) participants volunteered.

INTERVENTION

Each participant performed 3 maximal voluntary isometric contractions of the gluteus maximus, gluteus medius (GMED), adductor longus (AL), and vastus medialis, and 5 anterior reaches of the SEBT.

MAIN OUTCOME MEASURES

Three-dimensional joint kinematics of the hip and knee at the time of touchdown of the SEBT and integrated electromyography of each muscle were recorded during the descent phase of the SEBT. Coactivation ratios between the GMED and AL were calculated (GMED/AL). Pain level was assessed at the baseline and during performance of the SEBT, using a visual analog scale.

RESULTS

Participants with PFP demonstrated decreased GMED/AL coactivation ratio (P = .01) and shorter reach distance (P = .01) during anterior reach of the SEBT compared with the CON group. Participants with PFP demonstrated higher pain levels at baseline (P = .03) and during test performance (P < .001) compared with the CON group and increased pain level during the test performance compared with the baseline (P < .001). No other significant differences were observed.

CONCLUSIONS

There were alterations in muscle activity during SEBT performance, suggesting that overactivity of AL relative to GMED is a unique neural recruitment pattern in those with PFP. However, hip and knee joint kinematics did not seem to contribute to deficits in the anterior reach distance, suggesting a need for continued assessment of these deficiencies.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28714838

Citation

Goto, Shiho, et al. "Lower-Extremity Muscle Activity, Kinematics, and Dynamic Postural Control in Individuals With Patellofemoral Pain." Journal of Sport Rehabilitation, vol. 27, no. 6, 2018, pp. 505-512.
Goto S, Aminaka N, Gribble PA. Lower-Extremity Muscle Activity, Kinematics, and Dynamic Postural Control in Individuals With Patellofemoral Pain. J Sport Rehabil. 2018;27(6):505-512.
Goto, S., Aminaka, N., & Gribble, P. A. (2018). Lower-Extremity Muscle Activity, Kinematics, and Dynamic Postural Control in Individuals With Patellofemoral Pain. Journal of Sport Rehabilitation, 27(6), pp. 505-512. doi:10.1123/jsr.2016-0100.
Goto S, Aminaka N, Gribble PA. Lower-Extremity Muscle Activity, Kinematics, and Dynamic Postural Control in Individuals With Patellofemoral Pain. J Sport Rehabil. 2018 Nov 1;27(6):505-512. PubMed PMID: 28714838.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lower-Extremity Muscle Activity, Kinematics, and Dynamic Postural Control in Individuals With Patellofemoral Pain. AU - Goto,Shiho, AU - Aminaka,Naoko, AU - Gribble,Phillip A, Y1 - 2018/07/19/ PY - 2017/7/18/pubmed PY - 2018/10/27/medline PY - 2017/7/18/entrez KW - adductor longus KW - electromyography KW - gluteus maximus KW - gluteus medius KW - star excursion balance test KW - vastus medialis SP - 505 EP - 512 JF - Journal of sport rehabilitation JO - J Sport Rehabil VL - 27 IS - 6 N2 - CONTEXT: Altered lower-extremity muscle activity has been associated with lower-extremity kinematics in individuals with patellofemoral pain (PFP). However, few studies have examined these relationships, and the results are inconsistent. OBJECTIVE: To compare the lower-extremity muscle activity, kinematics, pain level, and reach distance during the anterior reach of the star excursion balance test (SEBT) between participants with PFP and healthy individuals (control [CON] group). DESIGN: Case control. SETTING: Research laboratory. PARTICIPANTS: Twenty-eight (PFP = 14 and CON = 14) participants volunteered. INTERVENTION: Each participant performed 3 maximal voluntary isometric contractions of the gluteus maximus, gluteus medius (GMED), adductor longus (AL), and vastus medialis, and 5 anterior reaches of the SEBT. MAIN OUTCOME MEASURES: Three-dimensional joint kinematics of the hip and knee at the time of touchdown of the SEBT and integrated electromyography of each muscle were recorded during the descent phase of the SEBT. Coactivation ratios between the GMED and AL were calculated (GMED/AL). Pain level was assessed at the baseline and during performance of the SEBT, using a visual analog scale. RESULTS: Participants with PFP demonstrated decreased GMED/AL coactivation ratio (P = .01) and shorter reach distance (P = .01) during anterior reach of the SEBT compared with the CON group. Participants with PFP demonstrated higher pain levels at baseline (P = .03) and during test performance (P < .001) compared with the CON group and increased pain level during the test performance compared with the baseline (P < .001). No other significant differences were observed. CONCLUSIONS: There were alterations in muscle activity during SEBT performance, suggesting that overactivity of AL relative to GMED is a unique neural recruitment pattern in those with PFP. However, hip and knee joint kinematics did not seem to contribute to deficits in the anterior reach distance, suggesting a need for continued assessment of these deficiencies. SN - 1543-3072 UR - https://www.unboundmedicine.com/medline/citation/28714838/Lower_Extremity_Muscle_Activity_Kinematics_and_Dynamic_Postural_Control_in_Individuals_With_Patellofemoral_Pain_ L2 - https://journals.humankinetics.com/doi/10.1123/jsr.2016-0100 DB - PRIME DP - Unbound Medicine ER -