Are there differences in jump height and muscle activation pattern across sand and rigid surface specific athletes? - Brodatzki, Y.; Wirtz, S.; Szwajca, S.; Büsch, D.; Zentgraf, K.; Eils, E. (Book of Abstracts of the 24th Annual Congress of the European College of Sport Science - 3rd - 6th July 2019, Prague - Czech Republic, 2019)