AUTHOR=Merelim Ana Sofia , Zacca Rodrigo , Moreira-Gonçalves Daniel , Costa Paulo P. , Baptista Liliana C. TITLE=Distinct exercise modalities on GUT microbiome in sarcopenic older adults: study protocol of a pilot randomized controlled trial JOURNAL=Frontiers in Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2025.1504786 DOI=10.3389/fmed.2025.1504786 ISSN=2296-858X