Running economy after a low- and high-intensity training session in naturally menstruating endurance-trained female athletes: The FENDURA project - Docter, H.; Taylor, M.; Müller, A. L.; De Koning, J. J.; Sandbakk, Ø. B.; Osborne, J. O.; Noordhof, D. A. (Scandinavian Journal of Medicine & Science in Sports, 2025)