Lower back pain is really vague. So , whatever exercise a kinesiologist or physical therapist advises for you particular situation. Mainly, core exercises, activating the pelvic floor, walking, swimming and activities like practicing Chi-gong, Taichi, pilates and Yoga are known to provide good support. But there are many good options out there.

mb with the term musculation, it's french for bodybuilding... so calisthenics or weights. Basically progressively including load bearing exercises to increase muscle strength in a controlled environment, which allows you to endure static postures longer without your muscles overreacting.