Researchers scanned the vertebral disks of a group of yoga practitioners and compared them with scans of healthy volunteers the same age. The yogis disks showed less degeneration and researchers speculate it's because of increased spinal nourishment. Nutrients migrate from blood vessels through the tough outer layer of the disks and the bending and flexing in yoga helps this nutrients reach the inner disks keeping them healthier.
Source: http://www.yogajournal.com/health/2638?utm_source=myyogamentor&utm_medium=email&utm_campaign=textlink
