QUIZHPILEMA PICHAZACA, T. N. .; SALAS CONTRERAS, F. H. .; ALLAICO MUYUDUMBAY, R. C. . A Bidirectional Relationship Between Cognitive Function, Muscle Mass, and Physical Activity Levels in Older Adults in Rural Areas of Ecuador. Runas. Journal of Education and Culture, v. 7, n. 15, p. e260396, 8 Oct. 2026.