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Authors
Sigmund, Erik
Sigmundová, Dagmar
Voráčová, Jaroslava
Vorlíček, Michal
Dygrýn, Jan
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Funding
Funding for this research was provided by:
Grantová Agentura České Republiky (reg. No. 25-18101S, reg. No. 25-18101S, reg. No. 25-18101S, reg. No. 25-18101S, reg. No. 25-18101S)
OPJAK (reg. No. CZ.02.01.01/0023_025/0008686, reg. No. CZ.02.01.01/0023_025/0008686, reg. No. CZ.02.01.01/0023_025/0008686)
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Article History
Received: 8 January 2025
Accepted: 12 May 2025
First Online: 26 May 2025
Declarations
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: This longitudinal study is conducted in compliance with the ethical principles of the 1964 Declaration of Helsinki and its later amendments. The Institutional Ethics Committee for Research of the Faculty of Physical Culture of Palacký University Olomouc approved the longitudinal design of the study, the course of preparation and implementation of baseline data collection (protocol code 25/2021 on 28 February 2021) and the follow-up phase of the research (protocol code 102/2023 on 10 November 2023). All school administrators received detailed information about the research design and data collection plan at a meeting in each of the participating schools. Parents/legal guardians of children were informed in advance of the research, its design, and content through the school leadership team, and could withdraw their child if they wished. Parents/guardians were given information about the purpose, content and process of the research as well as the option to withdraw their child. Informed consent was obtained from parents/guardians for the minors to participate in the study. At both stages of data collection, participation of families with children is voluntary and without any financial incentives.
: Not applicable.
: The authors declare no competing interests.
