Loading Speed and Intensity in Eccentric Calf Training Impact Acute Changes in Achilles Tendon Thickness and Stiffness: A Randomized Crossover Trial. - PRINGELS, LAUREN; PIETERS, DRIES; VAN DEN BERGHE, SARAH; WITVROUW, ERIK; BURSSENS, ARNE; VANDEN BOSSCHE, LUC; WEZENBEEK, EVI (Medicine & Science in Sports & Exercise, 2025)