Abstract
BACKGROUND: Physical activity is known to help prevent physical frailty, but it is not clear which physical activities practiced alone or in combination are most closely associated with a lower risk of physical frailty. We investigated differences in the associations of exercise habit, social participation, and moderate-to-vigorous physical activity (MVPA) with physical frailty and its components among community-dwelling older Japanese adults. SUBJECTS AND METHODS: A total of 831 older adults participated in this cross-sectional study. Physical frailty was defined based on the Fried et al. criteria. Exercise habit was defined as exercising ≥ 30 min per day for ≥ 2 days per week for ≥ 1 year. Social participation was defined as participating in community activities ≥ 1/week. MVPA was defined as ≥ 300 min/week of moderate physical activity (MPA) or 150 min/week of vigorous physical activity (VPA). We classified the participants into eight groups according to the presence/absence of these activities, and we performed a logistic regression analysis to investigate the association between different activities, both alone and in combination, and physical frailty. RESULTS: The prevalence of physical pre-frailty + frailty was 74.8% in the None group, 65.0% in the Exercise habit group, 76.3% in the Social participation group, 56.5% in the MVPA group, 58.7% in the Exercise habit + Social participation group, 44.0% in the Exercise habit + MVPA group, 41.3% in the Social participation + MVPA group, and 38.0% in the All group. Compared to the None group, the groups in which participants were engaged in any combination of two or more types of activity, as well as the MVPA-alone group had significantly lower risks of physical pre-frailty + frailty. CONCLUSION: Community-dwelling older Japanese adults who engaged in MVPA or any combination of two or more types of physical activity as defined herein had lower risks of physical pre-frailty and frailty.