55 here. Had a herniated disc, L5,S1 about 10 years ago. Have had probably 5 cortisone injections and met with surgeon to discuss surgical options, which I didn’t proceed with. Started doing basic planks every day and now have graduated with the most advanced planks. I also do Hack squats with landmine which keeps my form in check. Also hip thrusts and lots of stretching! If back hurts with any exercises drop weight, check form and if no improvement stop that exercise for a few weeks. For me, having a rock solid core has been the key. 10 years later my back is doing very good. Even if I have a flare up now it doesn’t last long. At 55 I’m the best shape of my life! I know this might not work for everyone, but it has worked for me. Back pain sucks!!! Keep at it and make your core the center of you workout!
Good luck!