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SMER: Sports Medicine and Rehabilitation Sciences: Randomized controlled trial
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites
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PubMed contains abstracts and links to full text articles. You can search for full text articles by selecting Free Full Text under Text availability on the left side of the search results.
To search for a randomized controlled trial enter your topic and click search.
When the search results are displayed, on the left side of the screen, you will see ARTICLE TYPE, check RANDOMIZED CONTROLLED TRIAL, see picure below
In the abstract, look for design: randomized controlled trial