Triceps surae muscle-tendon unit properties in preadolescent children a comparison of artistic gymnastic athletes and non-athletes - Pentidis, Nikolaos; Mersmann, Falk; Bohm, Sebastian; Giannakou, Erasmia; Aggelousis, Nickos; Arampatzis, Adamantios (Humboldt-Universität zu Berlin, 2019)