The role of sleep on physical and cognitive performance of ultra-endurance athletes: A systematic review - Guilherme, L. Q.; Rodrigues, B. O.; de Oliveira Barbosa Rosa, C.; Leite, L. B.; Scheer, V.; Forte, P.; Hermsdorff, H. H. M.; Kravchychyn, A. C. P.; de Sá Souza, H. (Journal of Clinical Medicine, 2026)