Article

Rotational strength, range of motion, and function in people with unaffected shoulders from various stages of life

School of Rehabilitation Science, McMaster University, Hamilton, Ontario, L8S 1C7, Canada. .
Sports Medicine Arthroscopy Rehabilitation Therapy & Technology 02/2009; 1:4. DOI: 10.1186/1758-2555-1-4
Source: PubMed

ABSTRACT Different measurements are used to assess shoulder function, including range of motion, strength, functional performance and self-report function. To understand disablement, it is necessary to understand the relationship between impairments and function in persons without shoulder problems. This study was conducted to enhance existing comparative data in subjects without upper extremity pathology, and to assess the relationships between impairments (range of motion, strength) and self-reported or measured function/disability. The impact of age, gender and dominance was determined.
Two-hundred ninety-four subjects with unaffected shoulders were recruited. The subjects (mean age: 37 years old) were divided into three subgroups, 18-39, 40-59, and over 60 years of age. During a single session, at least two of the following variables were measured: self-reported function (shoulder disability scales), range of motion, isometric rotational strength, or upper limb functional performance (FIT-HaNSA). Two-way analysis of variance was used to determine, for each variable, the effects of age and gender. The relationship between the outcomes was established using Pearson product correlations.
Men were significantly stronger than women for all age categories. There was an age-related decline in strength in men in the over-60 age category. Significant negative correlations between strength and range of motion were demonstrated (-0.22 <r < -0.32). Women had a significantly higher range of motion than men for external rotation in the 40-59 age category. Furthermore, the subjects in the over-60 age category experienced a decrease of range of motion. There was minimal disability reported in all age groups on self-report scales. Only the Simple Shoulder Test demonstrated significant decreases in the over-60 age category and correlated with age (r = -0.202).
Self-reported disability was low in individuals without upper extremity problems, although recruitment of such individuals was difficult in the older age groups due to the high prevalence of shoulder pathology. A low correlation between self-report disability and strength/range of motion in these unaffected subjects reflects the lack of disability reported by all subjects without pathology despite normal variations in strength and motion.

Download full-text

Full-text

Available from: Joy C Macdermid, Jul 04, 2015
1 Follower
 · 
151 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: The application of the small angle magnetization rotation (SAMR) method to the measurement of the saturation magnetostriction of a twisted, low-magnetostrictive wire is analyzed in the framework of the micromagnetic approximation. We show that the applied torsion introduces into the electric signal picked up from a secondary coil coaxial with the wire a fundamental harmonic contribution. Nevertheless, the measurement of saturation magnetostriction value can be performed using the same well known SAMR formula
    IEEE Transactions on Magnetics 10/1997; DOI:10.1109/20.619627 · 1.21 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: With variations in joint destruction, patient expectations and health status, it can be difficult to interpret outcomes following arthroplasty. The purpose of this study was to determine the relationships between different outcome indicators in 44 patients followed for two years after a reverse shoulder arthroplasty. Prospectively collected outcomes included the Constant-Murley score, Simple Shoulder Test (SST), range of motion (ROM), strength, patient satisfaction with their care and independent clinician case-review to determine global clinical outcome. Continuous outcomes were divided in two subgroups according to definitions of functional outcomes. Cohen's kappa was used to evaluate agreement between outcomes. Pearson correlations were used to quantify interrelationships. Although 93% of patients were substantially satisfied, fewer had good results on the other outcomes: 68% on global clinical outcome, 46% on SST and 73% on Constant-Murley score. The SST demonstrated better than chance agreement with Constant-Murley score, ROM in flexion, abduction and external rotation, and strength in external rotation. No agreement between satisfaction and other outcomes were observed. Significant correlations were observed between Constant-Murley score and SST (r = 0.78). The Constant-Murley score and SST demonstrated variable correlation with ROM and strength in flexion, abduction, internal and external rotation (0.38 < r < 0.73); the highest correlations being observed with shoulder elevation ROM (r > 0.50). Results show that outcome varies according to patient perspective and assessment methods. Patient satisfaction with their care was related to neither self-reported nor physical impairment outcomes. Positive patient ratings of satisfaction may not necessarily be evidence of positive outcomes.
    The Open Orthopaedics Journal 05/2010; 4(1):157-63. DOI:10.2174/1874325001004010157
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper describes the functional limitations due to normal aging that are associated with difficulties in older persons housing environments. Literature review from occupational therapy, medicine and human kinetics was used to study the evolution of abilities with aging, the prevalence of functional limitations in old age and the implications of these limitations in the use of the housing environment. In addition, the functional limitations used in instruments for assessing and analysing accessibility problems in housing and to evaluate housing were analyzed. Ten functional limitations that may arise with aging and have implications in the use of the housing environment were identified and described. Functional limitations associated with aging are physical, sensory or cognitive impairments. These limitations can be combined to set a specific functional profile of an older person or to establish a generic functional profile of an aging population. Functional profiles can be used to set performance specifications for design or to assess housing environments for community-living older people. Profiles can also be used to adapt the environment to the specific needs of users.