AUTHOR=Kranjc Sara , Fink Mojca , Nakamura Masatoshi , Kozinc Žiga TITLE=Acute effects of proprioceptive neuromuscular facilitation stretching on rectus femoris muscle stiffness: a dose-response shear-wave elastography study JOURNAL=Frontiers in Physiology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1496825 DOI=10.3389/fphys.2024.1496825 ISSN=1664-042X