The journal of nutrition, health & aging

, Volume 16, Issue 1, pp 67–77

How to assess functional status: A new muscle quality index

Authors

  • S. Barbat-Artigas
    • Groupe de Recherche en Activité Physique AdaptéeUniversity of Quebec at Montreal
    • Department of KinanthropologyUniversity of Quebec at Montreal
  • Y. Rolland
    • Gérontopôle de ToulouseHospital La Grave-Casselardit, INSERM 1027
  • M. Zamboni
    • Department of Biomedical and Surgical Sciences, Division of GeriatricsUniversity of Verona
    • Groupe de Recherche en Activité Physique AdaptéeUniversity of Quebec at Montreal
    • Department of KinanthropologyUniversity of Quebec at Montreal
    • Research Centre of the Montreal Geriatric University Institute
    • Department of kinanthropologyUniversity of Quebec at Montreal
JNHA: Clinical Trials and Aging

DOI: 10.1007/s12603-012-0004-5

Cite this article as:
Barbat-Artigas, S., Rolland, Y., Zamboni, M. et al. J Nutr Health Aging (2012) 16: 67. doi:10.1007/s12603-012-0004-5

Abstract

Aging is associated with decreases in muscle mass, muscle strength and muscle power, with muscle strength declining at a higher rate than muscle mass, but at a lower rate than muscle power. This progressive mismatch suggests a deterioration of muscle “quality” that may lead to functional incapacities. Although it may be difficult to synthesize the concept of muscle quality, the aim of the present paper was to propose a clinical definition of muscle quality in regard to the functional status. Accordingly, the muscle strength or muscle power per unit of muscle mass ratios appear to be clinically relevant markers of muscle quality. Several mechanisms susceptible to influence these ratios have been described, among which age, gender, sex hormones, obesity, physical activity and fibrosis. Various methods to assess muscle quality in both the clinical and research fields have also been listed, with a particular interest for the tests used to measure muscle power. Finally, we proposed a clinical screening tool to detect individuals at risk of functional incapacities. Briefly, the muscle quality score is based on handgrip strength assessment by hand dynamometer, muscle mass measurement by bioelectrical analysis, and leg muscle power estimation using a chair stand test.

Key words

Muscle mass muscle strength muscle power aging functional capacity

Copyright information

© Serdi and Springer Verlag France 2012