AUTHOR=Zhang Zhijie , Wang Wenjing , Li Feng , Guo Jiayi TITLE=Age and sex-related differences in elastic properties of the gastrocnemius muscle-tendon unit: an observational prospective study JOURNAL=Frontiers in Aging VOLUME=5 YEAR=2024 URL=https://www.frontiersin.org/journals/aging/articles/10.3389/fragi.2024.1455404 DOI=10.3389/fragi.2024.1455404 ISSN=2673-6217