title: Association between toe grasping strength and accelerometer-determined physical activity in middle-aged and older women.
abstract: [Purpose] To test the hypothesis that toe grasping strength is associated with daily physical activity in older adults. [Subjects] Fifty-seven Japanese women, aged 52-78 years, volunteered. [Methods] Toe grasping and knee extension strength were measured. Physical activity was also measured, using an accelerometer, and the total duration of each level of exercise intensity (light, moderate, and vigorous) and average step counts were calculated. Subjects were separated into two groups on the basis of accelerometer-determined step counts: LOW (n=28, <8000 steps/day) and HIGH (n=29, ≥8000 steps/day). [Results] Body mass index and body composition (% fat and fat-free mass) were similar between the two groups. Absolute and relative toe grasping strengths (divided by body weight) were greater in HIGH than in LOW. However, both absolute and relative knee extension strength were similar between the groups. Relative toe grasping and knee extension strength correlated with all 3 intensities of physical activity and average step count. After adjusting for age, the duration of light plus moderate physical activity and average step counts correlated to toe grasping strength but not to knee extension strength. [Conclusion] Our results suggest that toe grasping strength may be associated with the amount of light intensity daily physical activity.
authors.affiliation: Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, School of Applied Sciences, The University of Mississippi, USA ; Active Aging Research Center, Toyo Gakuen University, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Abe
authors.affiliation: Department of Kinesiology, Texas Wesleyan University, USA ; Active Aging Research Center, Toyo Gakuen University, Japan.
authors.forename: Robert S
authors.initials: RS
authors.lastname: Thiebaud
authors.affiliation: Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, School of Applied Sciences, The University of Mississippi, USA ; Active Aging Research Center, Toyo Gakuen University, Japan.
authors.forename: Jeremy P
authors.initials: JP
authors.lastname: Loenneke
authors.affiliation: Active Aging Research Center, Toyo Gakuen University, Japan.
authors.forename: Naotoshi
authors.initials: N
authors.lastname: Mitsukawa
keywords: Accelerometer; Foot muscle strength; Isometric contraction