A PT recommend the bridge exercise to help with the deconditioning from LC. I find it to be really helpful for gaining back core strength and it doesn’t affect my LT symptoms because it is low impact and done while lying down. My specific instructions from my PT is 2 sets of 10 reps holding each bridge for 10 seconds.
https://www.verywellfit.com/how-to-do-the-bridge-exercise-3120738