Muscle recruitment pattern for vastus medialis oblique muscle: a systematic review
Abstract
Introduction: The pattern of muscle recruitment in patients with anterior knee pain demonstrates some dysfunction. Rehabilitation protocols aim to promote the balance between the portions of the quadriceps muscle, by selective strengthening of the Vastus Medialis Oblique (VMO), however, there is no consensus in the literature regarding the best way to recruit the VMO. Objective: Conduct a systematic review regarding the identification of the most effective angles proposals for recruitment of the VMO muscle. Materials and Methods: Were consulted the databases PubMed/Medline, Bireme/Lilacs, SciELO, PEDro. Inclusion criteria were healthy individuals, use of electromyography and measurement of angulation for activation of the VMO. The extracted data were: authors; year; local of the study; sample; more effective angulation to recruitment; movement pattern adopted; other muscles compared. Results: The review found 19 articles with the established criteria. Of these, three show that activation is best achieved at an angle of 90 °, three articles at 60º, three articles at 45º, four articles at 30º and the others showed varied angles. Regarding the movement pattern, nine articles performed exercises in open kinetic chain and ten studies in closed kinetic chain, of these, four performed squat, one squat associated with hip adduction, two used the step, one the leg press and one leg press associated with hip adduction. Conclusion: The wide variety of methodologies used in the studies analyzed in this review complicate the design of a consensus on the subject, demonstrating, therefore, that there is not a pattern most effective for specific recruitment of these muscles.
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