Title

Anatomical predictors of maximum isometric and concentric knee extensor moment.

Document Type

Journal Article

Publisher

Springer

Faculty

Computing, Health and Science

School

Exercise, Biomedical and Health Science, Centre for Exercise and Sports Science Research

RAS ID

8948

Comments

Originally published as: Blazevich, A. J., Coleman, D. R., Horne, S., & Cannavan, D. (2009). Anatomical predictors of maximum isometric and concentric knee extensor moment. European journal of applied physiology, 105(6), 869-878. Original available here

Abstract

The most important anatomical determinants of in vivo joint moment magnitude have yet to be defined. Relationships between maximal knee extensor moment and quadriceps muscle volume, anatomical (ACSA) and physiological (PCSA) cross-sectional area, muscle architecture and moment arm (MA) were compared. Nineteen untrained men and women performed maximal isokinetic knee extensions under isometric conditions (90° joint angle) and at 30° and 300° s−1. Magnetic resonance and ultrasound imaging techniques were used to measure vastus lateralis PCSA and fascicle length (FL), quadriceps ACSA, volume and patellar tendon MA. Muscle volume was the best predictor of extensor moment measured isometrically (R2 = 0.60) and at 30° s−1 (R2 = 0.74). PCSA × FL was the best predictor of moment at 300° s−1 (R2 = 0.59). MA was not an important predictor. ACSA was the second best predictor at all three speeds and could be recommended as an ideal measure given its relative ease of measurement.

DOI

10.1007/s00421-008-0972-7

 

Link to publisher version (DOI)

10.1007/s00421-008-0972-7