Welcome to Mayo Connect, Carlos, where we are a community of patients and caregivers sharing our experiences and supporting one another. As to whether you are causing damage, only your doctor and imaging can tell you. This area is outside my usual area of replying, but my husband has had a diagnosis of spondlyolisthesis for almost 40 years. He doesn't golf, but has managed to stay strong so he can do what he wants (including paddleboard) with daily exercises prescribed by a Physical Therapist.

With any skeletal condition, one of the ways to help yourself is to be seen by a rehabilitation PT for evaluation and a custom course of stretches and exercises meant to strengthen the muscles supporting your spine. A little "limbering up" before you golf is not enough. You will need to do the exercises either daily or several times a week for life, but it can keep you going for a long, long time.

The second piece is to find a rehab golf coach (or PT who specializes in adapting golf swings) and learn how to golf safely with your limitations. For many years I played disc golf, and as my body aged and arthritis progressed, I had to learn to throw for accuracy, not distance. Good thing I was only a casual player, and not super competitive!

Have you tried specialized PT designed just for you? (Not one of the back clinics that have set exercises for everyone...) What coaching have you gotten to modify your swing and stance?
Sue