This exercise can save your spine, which is your best friend. 80% of the world's population suffers from back pain. You can avoid the suffering you know or have not had yet. I spent almost 3 years in a paraplegic chair and this permanent exercise saved me and today I walk. This is because we can create neuronal anastomoses of the spinal cord and I am the living proof.
So, do not wait. Whatever your age, you must exercise your spine. It is never too early or too late. Do not waste time, do not lose health