Muscle volume compared to cross-sectional area is more appropriate for evaluating muscle strength in young and elderly individuals

Ryota Akagi, Yohei Takai, Megumi Ohta, Hiroaki Kanehisa, Yasuo Kawakami, Tetsuo Fukunaga

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

Objective: the present study examined which of muscle volume (MV) and cross-sectional area (CSA) is appropriate for evaluating the relation with elbow flexor muscle strength in young and elderly individuals. Methods: the subjects were 52 young (20-34 year; 30 men and 22 women) and 51 elderly individuals (60-77 year, 19 men and 32 women). The MV and maximal anatomical CSA (ACSA) of elbow flexors were determined by magnetic resonance imaging. The torque developed during maximal voluntary contraction of isometric elbow joint flexion was converted to force by dividing it by the forearm length of each subject. Results: torque was significantly correlated with MV in young and elderly individuals (r = 0.564-0.926). Similarly, force was also significantly correlated with ACSA in each of them (r = 0.637-0.906). However, the y -intercepts of the regression lines for the ACSA-force relationship in young men and women were significantly higher than zero. There was no age effect on torque per MV, whereas force per ACSA was significantly higher in young adults than in elderly individuals. Conclusion: for elbow flexors, MV compared to ACSA is appropriate for evaluating the size-strength relationship and the existence of age-related difference in muscle strength per size.

Original languageEnglish
Pages (from-to)564-569
Number of pages6
JournalAge and Ageing
Volume38
Issue number5
DOIs
Publication statusPublished - 2009
Externally publishedYes

Keywords

  • Elderly
  • Joint torque
  • Magnetic resonance imaging
  • Maximal isometric contraction
  • Muscle force

ASJC Scopus subject areas

  • Ageing
  • Geriatrics and Gerontology

Cite this

Muscle volume compared to cross-sectional area is more appropriate for evaluating muscle strength in young and elderly individuals. / Akagi, Ryota; Takai, Yohei; Ohta, Megumi; Kanehisa, Hiroaki; Kawakami, Yasuo; Fukunaga, Tetsuo.

In: Age and Ageing, Vol. 38, No. 5, 2009, p. 564-569.

Research output: Contribution to journalArticle

Akagi, Ryota ; Takai, Yohei ; Ohta, Megumi ; Kanehisa, Hiroaki ; Kawakami, Yasuo ; Fukunaga, Tetsuo. / Muscle volume compared to cross-sectional area is more appropriate for evaluating muscle strength in young and elderly individuals. In: Age and Ageing. 2009 ; Vol. 38, No. 5. pp. 564-569.
@article{84ca07a86a0a42eea94c62623ba6d8f8,
title = "Muscle volume compared to cross-sectional area is more appropriate for evaluating muscle strength in young and elderly individuals",
abstract = "Objective: the present study examined which of muscle volume (MV) and cross-sectional area (CSA) is appropriate for evaluating the relation with elbow flexor muscle strength in young and elderly individuals. Methods: the subjects were 52 young (20-34 year; 30 men and 22 women) and 51 elderly individuals (60-77 year, 19 men and 32 women). The MV and maximal anatomical CSA (ACSA) of elbow flexors were determined by magnetic resonance imaging. The torque developed during maximal voluntary contraction of isometric elbow joint flexion was converted to force by dividing it by the forearm length of each subject. Results: torque was significantly correlated with MV in young and elderly individuals (r = 0.564-0.926). Similarly, force was also significantly correlated with ACSA in each of them (r = 0.637-0.906). However, the y -intercepts of the regression lines for the ACSA-force relationship in young men and women were significantly higher than zero. There was no age effect on torque per MV, whereas force per ACSA was significantly higher in young adults than in elderly individuals. Conclusion: for elbow flexors, MV compared to ACSA is appropriate for evaluating the size-strength relationship and the existence of age-related difference in muscle strength per size.",
keywords = "Elderly, Joint torque, Magnetic resonance imaging, Maximal isometric contraction, Muscle force",
author = "Ryota Akagi and Yohei Takai and Megumi Ohta and Hiroaki Kanehisa and Yasuo Kawakami and Tetsuo Fukunaga",
year = "2009",
doi = "10.1093/ageing/afp122",
language = "English",
volume = "38",
pages = "564--569",
journal = "Age and Ageing",
issn = "0002-0729",
publisher = "Oxford University Press",
number = "5",

}

TY - JOUR

T1 - Muscle volume compared to cross-sectional area is more appropriate for evaluating muscle strength in young and elderly individuals

AU - Akagi, Ryota

AU - Takai, Yohei

AU - Ohta, Megumi

AU - Kanehisa, Hiroaki

AU - Kawakami, Yasuo

AU - Fukunaga, Tetsuo

PY - 2009

Y1 - 2009

N2 - Objective: the present study examined which of muscle volume (MV) and cross-sectional area (CSA) is appropriate for evaluating the relation with elbow flexor muscle strength in young and elderly individuals. Methods: the subjects were 52 young (20-34 year; 30 men and 22 women) and 51 elderly individuals (60-77 year, 19 men and 32 women). The MV and maximal anatomical CSA (ACSA) of elbow flexors were determined by magnetic resonance imaging. The torque developed during maximal voluntary contraction of isometric elbow joint flexion was converted to force by dividing it by the forearm length of each subject. Results: torque was significantly correlated with MV in young and elderly individuals (r = 0.564-0.926). Similarly, force was also significantly correlated with ACSA in each of them (r = 0.637-0.906). However, the y -intercepts of the regression lines for the ACSA-force relationship in young men and women were significantly higher than zero. There was no age effect on torque per MV, whereas force per ACSA was significantly higher in young adults than in elderly individuals. Conclusion: for elbow flexors, MV compared to ACSA is appropriate for evaluating the size-strength relationship and the existence of age-related difference in muscle strength per size.

AB - Objective: the present study examined which of muscle volume (MV) and cross-sectional area (CSA) is appropriate for evaluating the relation with elbow flexor muscle strength in young and elderly individuals. Methods: the subjects were 52 young (20-34 year; 30 men and 22 women) and 51 elderly individuals (60-77 year, 19 men and 32 women). The MV and maximal anatomical CSA (ACSA) of elbow flexors were determined by magnetic resonance imaging. The torque developed during maximal voluntary contraction of isometric elbow joint flexion was converted to force by dividing it by the forearm length of each subject. Results: torque was significantly correlated with MV in young and elderly individuals (r = 0.564-0.926). Similarly, force was also significantly correlated with ACSA in each of them (r = 0.637-0.906). However, the y -intercepts of the regression lines for the ACSA-force relationship in young men and women were significantly higher than zero. There was no age effect on torque per MV, whereas force per ACSA was significantly higher in young adults than in elderly individuals. Conclusion: for elbow flexors, MV compared to ACSA is appropriate for evaluating the size-strength relationship and the existence of age-related difference in muscle strength per size.

KW - Elderly

KW - Joint torque

KW - Magnetic resonance imaging

KW - Maximal isometric contraction

KW - Muscle force

UR - http://www.scopus.com/inward/record.url?scp=69449091875&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69449091875&partnerID=8YFLogxK

U2 - 10.1093/ageing/afp122

DO - 10.1093/ageing/afp122

M3 - Article

VL - 38

SP - 564

EP - 569

JO - Age and Ageing

JF - Age and Ageing

SN - 0002-0729

IS - 5

ER -