European Journal of Applied Physiology

, Volume 105, Issue 6, pp 869–878

Anatomical predictors of maximum isometric and concentric knee extensor moment

  • Anthony J. Blazevich
  • David R. Coleman
  • Sara Horne
  • Dale Cannavan
Original Article

DOI: 10.1007/s00421-008-0972-7

Cite this article as:
Blazevich, A.J., Coleman, D.R., Horne, S. et al. Eur J Appl Physiol (2009) 105: 869. doi:10.1007/s00421-008-0972-7

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.

Keywords

Muscle strengthSkeletal muscleConcentricMuscle architectureMoment armFascicle

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Anthony J. Blazevich
    • 2
    • 3
  • David R. Coleman
    • 1
    • 2
  • Sara Horne
    • 2
  • Dale Cannavan
    • 2
  1. 1.English Institute of SportManchesterUK
  2. 2.Centre for Sports Medicine and Human Performance, School of Sport and EducationBrunel UniversityMiddlesexUK
  3. 3.Centre for Exercise and Sport Science Research, School of Exercise, Biomedical and Health SciencesEdith Cowan UniversityPerthAustralia