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Hugo Sarmento gratefully acknowledges the support of a Spanish government subproject \u2018Integration ways between qualitative and quantitative data, multiple case development, and synthesis review as main axis for an innovative future in physical activity and sports research\u2019 [PGC2018-098742-B-C31] (Ministerio de Econom\u00eda y Competitividad, Programa Estatal de Generaci\u00f3n de Conocimiento y Fortalecimiento Cient\u00edfico y Tecnol\u00f3gico del Sistema I+D+i), which is part of the coordinated project \u2018New approach of research in physical activity and sport from mixed methods perspective\u2019 (NARPAS_MM) [SPGC201800X098742CV0]. No other specific sources of funding were used to assist in the preparation of this article.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Funding"}},{"value":"Filipe Manuel Clemente, Rodrigo Ramirez-Campillo and Hugo Sarmento declare that they have no conflicts of interest relevant to the content of this review.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflicts of interest\/Competing interests"}},{"value":"None.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Acknowledgements"}},{"value":"FMC led the project, ran the data search and methodological assessment, and wrote and revised the original manuscript. RRC analyzed and interpreted the data, wrote the statistical report and revised the original manuscript. HS ran the data search and methodological assessment and wrote and revised the original manuscript.\u00a0All authors read and approved the final manuscript.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Authorship Contributions"}}]}}