Mor, Guy, and Lee Gafter. “Training Intensity, Sleep, and athletes’ Well-Being During COVID-19 Lockdowns”. Scientific Journal of Sport and Performance 4, no. 3 (May 27, 2025): 368–381. Accessed July 26, 2025. https://sjsp.aearedo.es/index.php/sjsp/article/view/training-intensity-sleep-well-covid-19.