A while back a good friend of mine helped me to create some video content of me performing and explaining the exercises I often give for core strengthening. They may seem really simple and nit-picky, but this is how I rehabbed myself from a pretty debilitating back injury in my 20s.
If you have just injured yourself, especially if it was in your back, this series of exercises is meant to bring your core back online. These are particularly helpful if you are finding that the "core workouts" you have been trying don't really seem to be actually targeting your core. Or, if you've been trying to do workouts and feeling pain and soreness in places like your back.
Check it out!