 Long story short, stretching constantly every day and strengthening your core. But if you have to start with one thing, stretching. Because in my opinion, Jack, the spine is the backbone of the body. And the number of huge, powerful muscle groups that are attached to it and your pelvis, which pulls on your spine, it's just so important you stretch, especially as you get older, if you have back problems. What particular stretch do you do, or do you do a bunch of them?