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• W4387054342 abstract "Aging results in physiologic changes contributing to functional decline and increased risk of falls. Older adults are also at greater risk for hypotensive responses to sudden changes in posture, which may further exacerbate functional limitations. PURPOSE: The purpose of this study was to compare measures of gait and postural sway immediately following a period of seated rest vs a period of supine rest and to report the one-week stability of our measures. METHODS: Forty-two older (73 ± 6 yrs) adults (n = 35 women) reported on two occasions, one-week apart. During each visit participants performed a 3 m timed up-and-go (TUG) and 30 sec of quiet standing. Each task was performed under two conditions: following 10mins of seated rest and 10mins of supine rest. The order of the tasks/conditions were randomized. During the TUG, gait data were collected by a force-plate embedded walkway, deriving gait velocity (v), cadence (c), and active propulsion (AP). Center of pressure trajectory (COPT) data were collected during quiet standing on the same walkway, from which COPT during three consecutive 10 sec epochs were derived as well as an overall 30 sec COPT. RESULTS: There were significant differences across all gait features. TUG to completion was longer after supine rest compared to seated (11.92 ± 0.66 and 10.28 ± 0.41 sec, p < 0.01). Compared to seated rest, supine rest resulted in a slower gait v (88.79 ± 4.74 vs 103.70 ± 3.55 cm/s, p < 0.05), decreased c (109.89 ± 3.45 vs120.92 ± 2.59 spm, p < 0.05), and lower percentage of time spent in AP (56.32 ± 4.85 and 69.33 ± 4.14%, p < 0.05). COPT was significantly higher during the 10-20 sec epoch of quiet standing following supine rest as compared to seated rest (41.25 ± 13.85 and 37.10 ± 11.97 mm, p < 0.05). ICCs of COPT were variable -0.190-0.837. During the 10-20 sec epoch, ICCs were moderate (0.587-0.599). With the exception of the ICC for v following seated rest (0.378), ICCs of all other gait measures were moderate to strong (0.604 to 0.950). CONCLUSIONS: These results are among the first to quantify the effect of a sudden rise from a supine position on physical function; with stronger repeatability indicating it may show promise for improved falls risk identification. However, more work is needed to understand sources of variation in physical function that may be observed immediately following supine rest." @default.
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• W4387054342 date "2023-09-01" @default.
• W4387054342 modified "2023-09-27" @default.
• W4387054342 title "Effects Of Postural Change On Gait And Postural Sway In Older Adults" @default.
• W4387054342 doi "https://doi.org/10.1249/01.mss.0000986828.26804.e8" @default.
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