Excessive sitting can bring about many issues related to back health. Continuous flexion of your lumbar spine can lead to disc delamination which is where the outer collagen rings of the lumbar discs start to wear away. To help prevent this try to stand up every 20 – 30 minutes and walk around. The core musculature that supports your lower back shuts down after about 20 minutes of sitting, and moving around reactivates it. Keep your back healthy!