Normative values of agonist-antagonist shoulder strength ratios of adults aged 20 to 78 years

Richard E. Hughes, Marjorie E. Johnson, Shawn W. O'Driscoll, Kai Nan An

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Objective: To determine normative values for isometric flexion/extension, abduction/adduction, and external/internal rotation strength ratios about the shoulder and to determine if these ratios are affected by age or gender. Study Design: A cross-sectional study of 120 healthy volunteers (60 men, 60 women) aged 20 to 78 years. Setting: Orthopedic research laboratory. Methods: Flexion and extension strengths were measured isometrically using a Cybex II dynamometer at arm flexion angles of 30°, 60°, and 90°. Abduction and adduction strengths were measured at 30°, 60°, and 90°abduction. Internal and external rotation strengths were measured (1) with the arm abducted 15°and neutral external/internal rotation and (2) with the arm abducted 90°and externally rotated 30°above the transverse plane. Outcome Measures: Isometric strength ratios for flexion/extension, abduction/adduction, and external/internal rotation. Results: No statistically significant differences in agonist/antagonist strength ratios were found between dominant and nondominant sides or between genders. Age was associated with changes in strength ratios for measurements taken with the arm flexed or abducted 90°. Posture was found to affect strength ratios. Conclusions: These data can serve as a normative reference for clinical use.

Original languageEnglish (US)
Pages (from-to)1324-1326
Number of pages3
JournalArchives of Physical Medicine and Rehabilitation
Volume80
Issue number10
DOIs
StatePublished - Oct 1999

Fingerprint

Arm
Posture
Orthopedics
Healthy Volunteers
Cross-Sectional Studies
Outcome Assessment (Health Care)
Research

ASJC Scopus subject areas

  • Rehabilitation

Cite this

Normative values of agonist-antagonist shoulder strength ratios of adults aged 20 to 78 years. / Hughes, Richard E.; Johnson, Marjorie E.; O'Driscoll, Shawn W.; An, Kai Nan.

In: Archives of Physical Medicine and Rehabilitation, Vol. 80, No. 10, 10.1999, p. 1324-1326.

Research output: Contribution to journalArticle

Hughes, Richard E. ; Johnson, Marjorie E. ; O'Driscoll, Shawn W. ; An, Kai Nan. / Normative values of agonist-antagonist shoulder strength ratios of adults aged 20 to 78 years. In: Archives of Physical Medicine and Rehabilitation. 1999 ; Vol. 80, No. 10. pp. 1324-1326.
@article{c0993b585aae442baa899fc89b2cace1,
title = "Normative values of agonist-antagonist shoulder strength ratios of adults aged 20 to 78 years",
abstract = "Objective: To determine normative values for isometric flexion/extension, abduction/adduction, and external/internal rotation strength ratios about the shoulder and to determine if these ratios are affected by age or gender. Study Design: A cross-sectional study of 120 healthy volunteers (60 men, 60 women) aged 20 to 78 years. Setting: Orthopedic research laboratory. Methods: Flexion and extension strengths were measured isometrically using a Cybex II dynamometer at arm flexion angles of 30°, 60°, and 90°. Abduction and adduction strengths were measured at 30°, 60°, and 90°abduction. Internal and external rotation strengths were measured (1) with the arm abducted 15°and neutral external/internal rotation and (2) with the arm abducted 90°and externally rotated 30°above the transverse plane. Outcome Measures: Isometric strength ratios for flexion/extension, abduction/adduction, and external/internal rotation. Results: No statistically significant differences in agonist/antagonist strength ratios were found between dominant and nondominant sides or between genders. Age was associated with changes in strength ratios for measurements taken with the arm flexed or abducted 90°. Posture was found to affect strength ratios. Conclusions: These data can serve as a normative reference for clinical use.",
author = "Hughes, {Richard E.} and Johnson, {Marjorie E.} and O'Driscoll, {Shawn W.} and An, {Kai Nan}",
year = "1999",
month = "10",
doi = "10.1016/S0003-9993(99)90037-0",
language = "English (US)",
volume = "80",
pages = "1324--1326",
journal = "Archives of Physical Medicine and Rehabilitation",
issn = "0003-9993",
publisher = "W.B. Saunders Ltd",
number = "10",

}

TY - JOUR

T1 - Normative values of agonist-antagonist shoulder strength ratios of adults aged 20 to 78 years

AU - Hughes, Richard E.

AU - Johnson, Marjorie E.

AU - O'Driscoll, Shawn W.

AU - An, Kai Nan

PY - 1999/10

Y1 - 1999/10

N2 - Objective: To determine normative values for isometric flexion/extension, abduction/adduction, and external/internal rotation strength ratios about the shoulder and to determine if these ratios are affected by age or gender. Study Design: A cross-sectional study of 120 healthy volunteers (60 men, 60 women) aged 20 to 78 years. Setting: Orthopedic research laboratory. Methods: Flexion and extension strengths were measured isometrically using a Cybex II dynamometer at arm flexion angles of 30°, 60°, and 90°. Abduction and adduction strengths were measured at 30°, 60°, and 90°abduction. Internal and external rotation strengths were measured (1) with the arm abducted 15°and neutral external/internal rotation and (2) with the arm abducted 90°and externally rotated 30°above the transverse plane. Outcome Measures: Isometric strength ratios for flexion/extension, abduction/adduction, and external/internal rotation. Results: No statistically significant differences in agonist/antagonist strength ratios were found between dominant and nondominant sides or between genders. Age was associated with changes in strength ratios for measurements taken with the arm flexed or abducted 90°. Posture was found to affect strength ratios. Conclusions: These data can serve as a normative reference for clinical use.

AB - Objective: To determine normative values for isometric flexion/extension, abduction/adduction, and external/internal rotation strength ratios about the shoulder and to determine if these ratios are affected by age or gender. Study Design: A cross-sectional study of 120 healthy volunteers (60 men, 60 women) aged 20 to 78 years. Setting: Orthopedic research laboratory. Methods: Flexion and extension strengths were measured isometrically using a Cybex II dynamometer at arm flexion angles of 30°, 60°, and 90°. Abduction and adduction strengths were measured at 30°, 60°, and 90°abduction. Internal and external rotation strengths were measured (1) with the arm abducted 15°and neutral external/internal rotation and (2) with the arm abducted 90°and externally rotated 30°above the transverse plane. Outcome Measures: Isometric strength ratios for flexion/extension, abduction/adduction, and external/internal rotation. Results: No statistically significant differences in agonist/antagonist strength ratios were found between dominant and nondominant sides or between genders. Age was associated with changes in strength ratios for measurements taken with the arm flexed or abducted 90°. Posture was found to affect strength ratios. Conclusions: These data can serve as a normative reference for clinical use.

UR - http://www.scopus.com/inward/record.url?scp=0032853950&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032853950&partnerID=8YFLogxK

U2 - 10.1016/S0003-9993(99)90037-0

DO - 10.1016/S0003-9993(99)90037-0

M3 - Article

VL - 80

SP - 1324

EP - 1326

JO - Archives of Physical Medicine and Rehabilitation

JF - Archives of Physical Medicine and Rehabilitation

SN - 0003-9993

IS - 10

ER -