AUTHOR=Morais Jorge E. , Marinho Daniel A. , Castro Flávio A. De Souza , Barbosa Tiago M. TITLE=Editorial: Coaches' Role in Youth Sports Performance: Early Specialization Versus Long-Term Development JOURNAL=Frontiers in Psychology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2021.774944 DOI=10.3389/fpsyg.2021.774944 ISSN=1664-1078