An empirical study of 15-minute fitness circles and the health of Chinese older adults-based on the mediating effect of physical activity.

The grouping results showed that the total effect (β = 0.050, SE = 0.034, p < 0.05) and direct effect (β = 0.013, SE = 0.005, p < 0.01) were higher in the male group than in the female group (total effect β = 0.031, SE = 0.035, p < 0.05; direct effect β = 0.011, SE = 0.005, p < 0.05), but the differences between groups did not reach statistical significance (Δβ = 0.019, p = 0.090; Δβ = 0.002, p = 0.087).

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