Constructing an index of physical fitness age for Japanese elderly based on 7-year longitudinal data: sex differences in estimated physical fitness age.

Publisher: Springer Country of Publication: Netherlands NLM ID: 101250497 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1574-4647 (Electronic) Linking ISSN: 01619152 NLM ISO Abbreviation: Age (Dordr) Subsets: MEDLINE

Original Publication: Dordrecht, The Netherlands ; Hingham, MA : Springer, c2005-

Aging* ; Geriatric Assessment* ; Physical Endurance* ; Physical Fitness*; Asian People/*statistics & numerical data; Aged ; Aged, 80 and over ; Cross-Sectional Studies ; Female ; Hand Strength ; Health Status Indicators ; Humans ; Japan/epidemiology ; Longitudinal Studies ; Male ; Middle Aged ; Muscle Strength ; Postural Balance ; Range of Motion, Articular ; Sex Distribution ; Walking

A standardized method for assessing the physical fitness of elderly adults has not yet been established. In this study, we developed an index of physical fitness age (fitness age score, FAS) for older Japanese adults and investigated sex differences based on the estimated FAS. Healthy elderly adults (52 men, 70 women) who underwent physical fitness tests once yearly for 7 years between 2002 and 2008 were included in this study. The age of the participants at the beginning of this study ranged from 60.0 to 83.0 years. The physical fitness tests consisted of 13 items to measure balance, agility, flexibility, muscle strength, and endurance. Three criteria were used to evaluate fitness markers of aging: (1) significant cross-sectional correlation with age; (2) significant longitudinal change with age consistent with the cross-sectional correlation; and (3) significant stability of individual differences. We developed an equation to assess individual FAS values using the first principal component derived from principal component analysis. Five candidate fitness markers of aging (10-m walking time, functional reach, one leg stand with eyes open, vertical jump and grip strength) were selected from the 13 physical fitness tests. Individual FAS was predicted from these five fitness markers using a principal component model. Individual FAS showed high longitudinal stability for age-related changes. This investigation of the longitudinal changes of individual FAS revealed that women had relatively lower physical fitness compared with men, but their rate of physical fitness aging was slower than that of men.

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Date Created: 20110323 Date Completed: 20120619 Latest Revision: 20221207

20250114

PMC3260370

10.1007/s11357-011-9225-5

21424789