https://www.selleckchem.com/pr....oducts/PIK-75-Hydroc
This systematic review aimed to identify and summarize the reliability and validity of the questionnaires that have been designed for assessing self-perceived physical fitness (PF) in elderly people. Three electronic databases (MEDLINE/PubMed, SPORTDiscuss and Scopus) were searched systematically from their inception until March 2021 in order to find investigations that provided information on the reliability and/or validity of questionnaires used for identifying self-perceived PF in this population. Nine studies fulfilled
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