Preferential strengthening of VMO muscle during selected biomechanical rehabilitative exercises of automotive workers with patellofemoral pain syndrome

BACKGROUND: Automotive workers are engaged in occupational activities like engine tune-ups, oil changes, tire rotation, wheel balancing, replacing filters etc. These activities involve prolonged sitting, awkward postures, squatting and kneeling, which are known risk factors to cause patellofemoral p...

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Bibliographic Details
Published in:Work (Reading, Mass.) Mass.), 2018-01, Vol.60 (1), p.135-141
Main Authors: Singh, Greesh Kumar, Srivastava, Sanjay
Format: Article
Language:English
Subjects:
Adult
Analysis of Variance
Automobile industry
Automobiles - statistics & numerical data
Automotive engines
Biomechanical Phenomena
Biomechanics
Electromyography
Electromyography - methods
Exercise - physiology
Exercise Therapy - methods
Female
Hip
Hip joint
Humans
Identification methods
Knee
Male
Manufacturing and Industrial Facilities
Muscle function
Muscles
Occupational health
Pain
Patellofemoral Pain Syndrome - rehabilitation
Quadriceps Muscle - injuries
Risk analysis
Risk factors
Rotation
Variance analysis
Workers
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Summary:BACKGROUND: Automotive workers are engaged in occupational activities like engine tune-ups, oil changes, tire rotation, wheel balancing, replacing filters etc. These activities involve prolonged sitting, awkward postures, squatting and kneeling, which are known risk factors to cause patellofemoral pain syndrome (PFPS). OBJECTIVE: This paper aims to investigate the effects of selected biomechanical rehabilitative exercises (BRE) on integrated electromyography (iEMG) activity of vastus medialis oblique (VMO) and vastus lateralis (VL) muscles so as to identify suitable ones to alleviate PFPS of automotive workers. METHODS: Eleven subjects, automotive workers having PFPS, performed four BRE: (1) short arc quad with neutral hip position (SAQN), (2) short arc quad with externally rotated hip position (SAQER), (3) medial tibial rotation (MTR), and (4) hip adduction (HA). RESULTS: Mean iEMG activity of VMO muscle is more than that of VL muscle during all BRE. However, one way ANOVA with repeated measures indicates that mean iEMG activity of VMO muscle is significantly higher than that of VL muscle during SAQER only. VMO/VL ratio is not significantly different across the four BRE. CONCLUSIONS: Results suggest a range of options for choosing appropriate BRE for treating automotive workers with PFPS. However, SAQER may directly be recommended for preferential strengthening of VMO muscle.
ISSN:1051-9815
1875-9270
DOI:10.3233/WOR-182723