If you have a hamstring or knee injury, you can still do...
If you have a hamstring or knee injury, you can still do your workout at a slower pace on the beach, ... It's just much more forgiving on the injury when you're running on the beach.
If you have a hamstring or knee injury, you can still do your workout at a slower pace on the beach, ... It's just much more forgiving on the injury when you're running on the beach.