Yeh, Yi-ChiehYi-ChiehYeh邱文玉2026-07-162026-07-1620250169-381610.1007/s10823-025-09547-8https://ir.ntus.edu.tw/handle/123456789/131429Exploring Intrapersonal Determinants of Older Adults' Group Exercise Engagement in Taiwan: A Theory of Triadic Influence Perspectivejournal article