Abstract：
OBJECTIVE: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. DESIGN:Cross-sectional study. SETTING:Movement laboratory of a geriatric rehabilitation clinic. PARTICIPANTS:Eighty-eight community-dwelling, cognitively unimpaired older women (mean age 78 years). MAIN OUTCOME MEASURES: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. RESULTS:Associations of sit-to-stand performance power with power assessed by the Nottingham Power Rig, maximum gait speed and muscle cross-sectional area were r=0.646, r=0.536 and r=0.514, respectively. A linear regression model explained 50% of the variance in sit-to-stand performance power including muscle cross-sectional area (p=0.001), maximum gait speed (p=0.002), and power assessed by the Nottingham Power Rig (p=0.006). CONCLUSIONS: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. CLINICAL TRIAL REGISTRATION NUMBER:DRKS00003622.
journal_name
Physiotherapyjournal_title
Physiotherapyauthors
Lindemann U,Farahmand P,Klenk J,Blatzonis K,Becker Cdoi
10.1016/j.physio.2014.12.005subject
Has Abstractpub_date
2015-09-01 00:00:00pages
298-302issue
3eissn
0031-9406issn
1873-1465pii
S0031-9406(15)00029-2journal_volume
101pub_type
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