If you have been told to "just stop running" because of an injury then you may have been given poor advice. Rest may calm symptoms, but it doesn’t solve your injury. Pain relief is simply a reduction in irritation, but it does not mean your tissues aren't ready to handle the demands of running. Some injuries do better if you continue to load them in a modified way, such as tendinopathies. You do have to stop running with a bone stress injury, but you can do things like core