Endurance-trained subjects and sedentary controls increase ventricular contractility and efficiency during exercise: Feasibility of hemodynamics assessed by non-invasive pressure-volume loops. - Östenson, Björn; Ostenfeld, Ellen; Edlund, Jonathan; Heiberg, Einar; Arheden, Håkan; Steding-Ehrenborg, Katarina (PLoS ONE, 2023)