Media type: E-Article Title: Modification and Applicability of Questionnaires to Assess the Recovery-Stress State Among Adolescent and Child Athletes Contributor: Kölling, Sarah; Ferrauti, Alexander; Meyer, Tim; Pfeiffer, Mark; Kellmann, Michael Published: Frontiers Media SA, 2019 Published in: Frontiers in Physiology, 10 (2019) Language: Not determined DOI: 10.3389/fphys.2019.01414 ISSN: 1664-042X Keywords: Physiology (medical) ; Physiology Origination: Footnote: Access State: Open Access