Physical performance and daily walking duration: associations in 1271 women and men aged 65-90 years.
OBJECTIVE
Several tests of physical performance like gait speed or standing balance are part of the geriatric assessment. Measures of physical activity like daily walking duration are more difficult to assess but may be of higher relevance for daily requirements. It is therefore of interest to what extent physical performance measures are associated with physical activity.


METHODS
In a cohort study, baseline screening was performed in 1271 community-living people aged 65-90 years from Ulm, Germany. Average daily walking duration was assessed in all participants by accelerometers over a one-week period. Habitual gait speed, 5-Chair-Rise test, standing balance and handgrip strength served as measures of physical performance. The association between measures of physical performance and physical activity was calculated by linear regression analysis.


RESULTS
The mean daily walking duration was 104.8 minutes in men and 103.0 minutes in women. A positive relationship between gait speed and walking duration was observed in men and women with low gait speed (≤0.8 m/s) but not in participants above this threshold. Standing balance and hand grip strength were positively and 5-Chair-Rise test inversely related with average daily walking duration. A relationship between hand grip strength and walking duration was only observed in women aged 75 years and more.


CONCLUSIONS
Physical performance measures and objectively measured walking duration are related with each other but only a small percentage of the variance of daily walking duration was explained by physical performance measures. Therefore, factors other than physical performance seem to influence daily walking duration to a great extent.
Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany. kilian.rapp@rbk.de
Kilian
K
Rapp
Jochen
J
Klenk
Petra
P
Benzinger
Sebastian
S
Franke
Michael D
MD
Denkinger
Richard
R
Peter
D000054:Acceleration; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging; D015331:Cohort Studies; D005260:Female; D005684:Gait; D015577:Geriatric Assessment; D005853:Geriatrics / Q000379:methods*; D005858:Germany; D018737:Hand Strength; D006801:Humans; D008297:Male; D009043:Motor Activity; D010809:Physical Fitness; D012044:Regression Analysis; D016138:Walking / Q000502:physiology*