Supplemental material, sj-avi-2-ajs-10.1177_0363546521989235 for Muscle Precursor Cells Enhance Functional Muscle Recovery and Show Synergistic Effects With Postinjury Treadmill Exercise in a Muscle Injury Model in Rats by Paola Contreras-Muñoz, Joan Ramón Torrella, Vanessa Venegas, Xavier Serres, Laura Vidal, Ingrid Vila, Ilmari Lahtinen, Vicente Martínez-Ibáñez, José Luis Peiró, Tero A.H. Järvinen, Gil Rodas and Mario Marotta in The American Journal of Sports Medicine