Abstract
In this paper, COP (center of pressure) during quiet standing and squat-and-stand movement was analyzed to compare the postural control of young and elderly subjects with special interest in the elderly females who were reported to have higher fall rate than the elderly males. Subjects include the young subjects (10 males: 21.8±2.6yrs, 10 females: 20.4±0.3yrs) and the elderly subjects (8 males: 75.5±4yrs, 8 females: 72.3±3.5yrs). Analysis parameters were the mean of the distance between the instantaneous COP and the average COP (COP distance) and the mean of the COP movement velocity (COP velocity) in both AP (anterio-posterior) and ML (medio-lateral) directions. During quiet standing, the COP distance in ML direction of elderly females was significantly greater than that of elderly males and the COP velocity of elderly females in both ML and AP direction were significantly greater than those of all the other groups. During squat-and-stand movement, the COP distance of elderly females was not significantly different with that of the elderly males. However, the COP velocity of elderly females was significantly greater than that of all the other groups. The large lateral weight shift (COP distance) of elderly females during quiet standing may explain their greater fall rate. However, this does not apply to squat-and-stand movement. In contrast, COP velocity results show that the elderly females' COP is rapidly trembling compared to that of elderly males during both quiet standing and squat-and-stand movement. This result suggests that rapid trembling or postural sway may reflect the reduced postural control ability and higher risk of fall in elderly females.
| Original language | English |
|---|---|
| Title of host publication | 13th International Conference on Biomedical Engineering - ICBME 2008 |
| Pages | 1814-1816 |
| Number of pages | 3 |
| Volume | 23 |
| DOIs | |
| Publication status | Published - 2009 Dec 1 |
| Event | 13th International Conference on Biomedical Engineering, ICBME 2008 - , Singapore Duration: 2008 Dec 3 → 2008 Dec 6 |
Other
| Other | 13th International Conference on Biomedical Engineering, ICBME 2008 |
|---|---|
| Country | Singapore |
| Period | 08/12/3 → 08/12/6 |
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Keywords
- Cop
- Fall-risk
- Gender
- Quiet standing
- Squatand-stand
ASJC Scopus subject areas
- Bioengineering
- Biomedical Engineering
Cite this
Postural sway of the elderly males and females during quiet standing and squat-and-stand movement. / Eom, Gwnagmoon; Kim, Jiwon; Park, Byung Kyu; Hong, Jeonghwa; Chung, Soonchul; Lee, Bongsoo; Tack, Gyerae; Kim, Yohan.
13th International Conference on Biomedical Engineering - ICBME 2008. Vol. 23 2009. p. 1814-1816.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Postural sway of the elderly males and females during quiet standing and squat-and-stand movement
AU - Eom, Gwnagmoon
AU - Kim, Jiwon
AU - Park, Byung Kyu
AU - Hong, Jeonghwa
AU - Chung, Soonchul
AU - Lee, Bongsoo
AU - Tack, Gyerae
AU - Kim, Yohan
PY - 2009/12/1
Y1 - 2009/12/1
N2 - In this paper, COP (center of pressure) during quiet standing and squat-and-stand movement was analyzed to compare the postural control of young and elderly subjects with special interest in the elderly females who were reported to have higher fall rate than the elderly males. Subjects include the young subjects (10 males: 21.8±2.6yrs, 10 females: 20.4±0.3yrs) and the elderly subjects (8 males: 75.5±4yrs, 8 females: 72.3±3.5yrs). Analysis parameters were the mean of the distance between the instantaneous COP and the average COP (COP distance) and the mean of the COP movement velocity (COP velocity) in both AP (anterio-posterior) and ML (medio-lateral) directions. During quiet standing, the COP distance in ML direction of elderly females was significantly greater than that of elderly males and the COP velocity of elderly females in both ML and AP direction were significantly greater than those of all the other groups. During squat-and-stand movement, the COP distance of elderly females was not significantly different with that of the elderly males. However, the COP velocity of elderly females was significantly greater than that of all the other groups. The large lateral weight shift (COP distance) of elderly females during quiet standing may explain their greater fall rate. However, this does not apply to squat-and-stand movement. In contrast, COP velocity results show that the elderly females' COP is rapidly trembling compared to that of elderly males during both quiet standing and squat-and-stand movement. This result suggests that rapid trembling or postural sway may reflect the reduced postural control ability and higher risk of fall in elderly females.
AB - In this paper, COP (center of pressure) during quiet standing and squat-and-stand movement was analyzed to compare the postural control of young and elderly subjects with special interest in the elderly females who were reported to have higher fall rate than the elderly males. Subjects include the young subjects (10 males: 21.8±2.6yrs, 10 females: 20.4±0.3yrs) and the elderly subjects (8 males: 75.5±4yrs, 8 females: 72.3±3.5yrs). Analysis parameters were the mean of the distance between the instantaneous COP and the average COP (COP distance) and the mean of the COP movement velocity (COP velocity) in both AP (anterio-posterior) and ML (medio-lateral) directions. During quiet standing, the COP distance in ML direction of elderly females was significantly greater than that of elderly males and the COP velocity of elderly females in both ML and AP direction were significantly greater than those of all the other groups. During squat-and-stand movement, the COP distance of elderly females was not significantly different with that of the elderly males. However, the COP velocity of elderly females was significantly greater than that of all the other groups. The large lateral weight shift (COP distance) of elderly females during quiet standing may explain their greater fall rate. However, this does not apply to squat-and-stand movement. In contrast, COP velocity results show that the elderly females' COP is rapidly trembling compared to that of elderly males during both quiet standing and squat-and-stand movement. This result suggests that rapid trembling or postural sway may reflect the reduced postural control ability and higher risk of fall in elderly females.
KW - Cop
KW - Fall-risk
KW - Gender
KW - Quiet standing
KW - Squatand-stand
UR - http://www.scopus.com/inward/record.url?scp=84891953455&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84891953455&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-92841-6_450
DO - 10.1007/978-3-540-92841-6_450
M3 - Conference contribution
AN - SCOPUS:84891953455
SN - 9783540928409
VL - 23
SP - 1814
EP - 1816
BT - 13th International Conference on Biomedical Engineering - ICBME 2008
ER -