Difference in fascicle behaviors between superficial and deep quadriceps muscles during isometric contractions

Document Type

Journal Article

Publication Title

Muscle & Nerve

Publisher

Wiley

School

School of Exercise and Health Sciences

RAS ID

20624

Comments

Ando, R., Nosaka, K., Inami, T., Tomita, A., Watanabe, K., Blazevich, A. J. & Akima, H. (2016), Difference in fascicle behaviors between superficial and deep quadriceps muscles during isometric contractions. Muscle & Nerve, 53(5), 797–802. Available here

Abstract

Introduction: In this study we examined changes in fascicle length and pennation of vastus intermedius (VI) and vastus lateralis (VL) from rest to isometric contraction. Methods: Fourteen healthy men performed submaximal (30% and 50% of maximal voluntary contraction; MVC) isometric knee extensions at 60° and 110° knee flexion (0°=full extension). Panoramic images of VL and VI were obtained at rest and during contractions to measure fascicle length and pennation using extended field-of-view ultrasonography, after confirmation that the technique could be used reliably during sustained submaximal isometric contractions. Results: The relative change in fascicle length from rest to 50% MVC was greater in VI than VL at 110° (P

DOI

10.1002/mus.24905

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