title: Acute Positive Effects of Exercise on Center-of-Pressure Fluctuations During Quiet Standing in Middle-Aged and Elderly Women.
abstract: Acute effects of exercise on postural stability have been studied with a focus on fatigue. This study investigated the acute effects of moderate-intensity exercise on center-of-pressure (COP) fluctuation measures in middle-aged and elderly women. Thirty-five healthy women volunteered: 18 women performed a moderate aquatic exercise session for 80 minutes and 17 remained calm in a sitting position for the same duration. Center-of-pressure fluctuations during quiet standing were recorded for 60 seconds with eyes open and closed before and after the exercise and sitting tasks. The time- and frequency-domain measures of the COP time series were calculated. The frequency-domain measures were also calculated for the COP velocity time series. According to 2-way analysis of variance and paired t-tests with a Bonferroni's correction, mean velocity of COP fluctuations, mean velocity of COP fluctuations in the medial-lateral (ML) direction, and total power of the COP velocity time series in the ML direction exhibited significant reductions after 1 session of exercise. These results indicated that a moderate-intensity aquatic exercise decreased COP velocity, counteracting age-related and fatigue-inducing postural deterioration. Therefore, we concluded that a single session of moderate-intensity aquatic exercise has acute positive effects on postural stability in middle-aged and elderly women.
authors.affiliation: 1Research Center for Total Life Health and Sports Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan;2Rehabilitation Engineering Laboratory, Toronto Rehabilitation Institute, Toronto, Ontario, Canada;3Rehabilitation Engineering Laboratory, University of Toronto, Toronto, Ontario, Canada;4Tanaka Institute for Educational Research, Tokyo, Japan; and5Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan.
authors.forename: Chiho
authors.initials: C
authors.lastname: Fukusaki
authors.forename: Kei
authors.initials: K
authors.lastname: Masani
authors.forename: Maya
authors.initials: M
authors.lastname: Miyasaka
authors.forename: Kimitaka
authors.initials: K
authors.lastname: Nakazawa
mesh_terms: D000368:Aged; D015444:Exercise / Q000502:physiology*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008875:Middle Aged; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011312:Pressure