49ers running back Isaac Guerendo tears pectoral muscle in offseason workout

San Francisco 49ers running back Isaac Guerendo is expected to miss extended time after tearing his pectoral muscle during an ...

Kyle Shanahan gives surprising injury update on 49ers running back

OTAs for the NFL began this week, but the injury bug has already hit the 49ers’ locker room. When coach Kyle Shanahan met ...

Isaac Guerendo tore a pectoral muscle, expected back late in camp

49ers running back Isaac Guerendo tore a pectoral muscle about a month ago while lifting weights, coach Kyle Shanahan said.
Runner's World

Yes, go to the gym, but don’t overdo it – here’s how to find the perfect balance between lifting and running

If you do strength training on a regular basis, first off, well done! Targeted resistance work can improve running economy, build resilience, and reduce injury risk. But like everything else in life, ...