Validity of linear encoder measurement of sit-to-stand performance power in older people. Issue 3 (September 2015)

• Record Type: Journal Article
• Authors: Lindemann, U.; Farahmand, P.; Klenk, J.; Blatzonis, K.; Becker, C.
• Is Part Of: Physiotherapy. Volume 101:Issue 3(2015)
• Page Start: 298
• Page End: 302
• Publication Date: 2015-09
• Subjects: Physical therapy -- Periodicals; Therapeutics, Physiological -- Periodicals; 615.8205
• DOI: 10.1016/j.physio.2014.12.005
• Languages: English
• ISSNs: 0031-9406

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <title id="sect0010">Objective</title> <p id="spar0005">To investigate construct validity of linear encoder measurement of sit-to-stand performance power in older people by showing associations with relevant functional performance and physiological parameters.</p> </sec> <sec> <title id="sect0015">Design</title> <p id="spar0010">Cross-sectional study.</p> </sec> <sec> <title id="sect0020">Setting</title> <p id="spar0015">Movement laboratory of a geriatric rehabilitation clinic.</p> </sec> <sec> <title id="sect0025">Participants</title> <p id="spar0020">Eighty-eight community-dwelling, cognitively unimpaired older women (mean age 78 years).</p> </sec> <sec> <title id="sect0030">Main outcome measures</title> <p id="spar0025">Sit-to-stand performance power and leg power were assessed using a linear encoder and the Nottingham Power Rig, respectively. Gait speed was measured on an instrumented walkway. Maximum quadriceps and hand grip strength were assessed using dynamometers. Mid-thigh muscle cross-sectional area of both legs was measured using magnetic resonance imaging.</p> </sec> <sec> <title id="sect0035">Results</title> <p id="spar0030">Associations of sit-to-stand performance power with power assessed by the Nottingham Power Rig, maximum gait speed and muscle cross-sectional area were <italic>r</italic> = 0.646, <italic>r</italic> = 0.536 and <italic>r</italic> = 0.514, respectively. A linear regression model explained 50% of the variance in sit-to-stand performance power including muscle cross-sectional area (<italic>p</italic> = 0.001), maximum gait speed (<italic>p</italic> = 0.002), and power assessed by the Nottingham Power Rig (<italic>p</italic> = 0.006).</p> </sec> <sec> <title id="sect0040">Conclusions</title> <p id="spar0035">Construct validity of linear encoder measurement of sit-to-stand power was shown at functional level and morphological level for older women. This measure could be used in routine clinical practice as well as in large-scale studies.</p> </sec> <sec> <title id="sect0045">Clinical Trial Registration Number</title> <p id="spar0040">DRKS00003622.</p> </sec> </abstract>