khunkitti, K., Muangritdech, N., Thanawat, T., Promsrisuk, T., Sengmuang, J., Chaikham, T., & Nadee, S. (2025). Effects of slow-deep breathing training program on physical performance in older adults with a history of covid-19 infection. Journal of Medicine and Health Sciences, 32(2), 56–74. retrieved from https://he01.tci-thaijo.org/index.php/jmhs/article/view/277752