Abstract
Objectives: To evaluate the electrical activity of the vastus medialis obliquus (VMO) and vastus lateralis longus (VLL) with the tibia in neutral, medial and lateral rotation on the horizontal leg press. Design: Repeated measures analysis of the effects of tibia rotation on VMO and VLL activity. Setting: Evaluation and intervention in orthopaedics and traumatology laboratory. Participants: Fifteen healthy participants, no previous musculoskeletal damage of the lower limb. Main outcome measures: Electrical activity (Root Mean Square) of the VMO and VLL was measured during submaximal isometric contractions (SIC) with the knee at 90° of flexion. The effect of tibia rotation in electrical activity of the VMO and VLL was measured. Results: VLL activity was significantly higher than VMO activity with the tibia in medial rotation ( p=0.03). Tibia rotation did not influence the activity of the VMO muscle ( p=0.26). VLL activity was significantly higher with medial than neutral tibia rotation ( p=0.005). Conclusions: The results suggest that tibia rotation does not strengthen selectively the VMO muscle during isometric leg press at 90° knee flexion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
