I have the feeling I’ve always had a weak back.
Some 4 months ago I started working out regularly. Now I can almost touch the floor with my hands without bending my knees.
While doing this exercise I heard a small crack on my back, nothing serious.
Since then I can lift weights easier than before but my back still hurts a bit. My back doesn’t hurt as much after coming home from work, which was normal before.
What else could I do to have a stronger back?
Yoga, specifically Hatha Yoga or Ashtanga Yoga with focus on the secondary series (there are 6 total).
I’d highly recommend to start out with classes and a suitable instructor though, there are a bunch of specific warm-ups to loosen some muscle groups and stretching certain areas that allow you to get into the required postures, trying to raw-dog those can lead to injuries if you force your stiff body into some positions it’s not used to.
If all you want are basic exercises to cycle through on a daily basis, 4-8 weeks of guided training is already enough to know what and how to do, you can continue with youtube from then on.