Take care of your health. Sitting long hours damages your spine. I learned this too late.
If I knew these exercises before the operation, I could have prevented it. Leading a healthy life, proper posture when sitting, physical exercise (for spine - especially swimming) are extremely important in the long run. Your spine degrades with time, load and improper posture. Sitting in general is unhealthy. Humans didn't evolve for sitting. I'm more comfortable lying or walking. People ask me to sit trying to be polite, but it really makes me less comfortable.