Corrigendum: Contrast Tempo of Movement and Its Effect on Power Output and Bar Velocity During Resistance Exercise - Wilk, Michal; Jarosz, Jakub; Krzysztofik, Michal; Filip-Stachnik, Aleksandra; Bialas, Marcin; Rzeszutko-Belzowska, Agata; Zajac, Adam; Stastny, Petr (Frontiers in Physiology, 2021)