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DOI: 10.1055/s-0031-1275741
© Georg Thieme Verlag KG Stuttgart · New York
Acute Effects of Exercise on Posture in Arthritic Patients
Publication History
accepted after revision March 22, 2011
Publication Date:
12 May 2011 (online)
Abstract
In this study, we aimed to investigate the acute effects of exercise on postural measures in arthritic patients. We obtained posturographic measurements of 8 women with lower extremity arthritis for 30 s before and after a 60-min aquatic exercise. The center of pressure (COP) was recorded while the volunteers were in an upright position with their eyes open. The time domain measures and the frequency domain measures of the COP time series in the anterior-posterior (AP) and medial-lateral (ML) directions were calculated. In addition, the frequency domain measures were calculated for the COP velocity time series. A paired t-test revealed no significant differences in any time domain measures between pre- and post-exercise; however, there were significant decreases in the 95% power frequency of the COP in the AP direction (0.834±0.296 to 0.627±0.230 Hz, p=0.027) for the frequency domain measures. For the velocity time series, the mean power frequency in both the AP (1.47±0.528 to 1.22±0.360 Hz, p=0.047) and ML (1.28±0.245 to 1.13±0.151 Hz, p=0.022) directions, and the 95% power frequency in the ML direction (3.41±0.653 to 2.96±0.468 Hz, p=0.038) decreased significantly in the post-exercise condition. This study reports that a single session of exercise has a subtle but detectable acute effect on postural balance in arthritic patients.
Key words
postural control - aquatic exercise - lower extremity arthritis
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Correspondence
Dr. Chiho Fukusaki
The University of Tokyo
Graduate School of Frontier
Sciences
5-1-5 Kashiwanoha
Kashiwa-shi
Chiba
277-5863 Kashiwa
Japan
Phone: +81/4/7136 4642
Fax: +81/4/7136 4642
Email: fukusaki@k.u-tokyo.ac.jp