Deephai N, Schmidt B, Laprattanathong P. Factors Affecting Physical Activity Behavior Among the Elderly in Chiang Mai Province, Thailand. IJSASR [internet]. 2026 Jan. 1 [cited 2026 Feb. 22];6(2):143-60. available from: https://so07.tci-thaijo.org/index.php/IJSASR/article/view/8079