combustion. n. 1. the process of burning. 2. (Chemistry) any process in which a substance reacts with oxygen to produce a significant rise in temperature and the emission of light. 3. (Chemistry) a chemical process in which two compounds, such as sodium and chlorine, react together to produce heat and light.
Facet joint syndrome is an arthritis-like condition of the spine that can be a significant source of back and neck pain. It is caused by degenerative changes to the joints between the spine bones. The cartilage inside the facet joint can break down and become inflamed, triggering pain signals in nearby nerve endings.
The disks and the small joints in the back are called facet joints. Running causes repeated jarring and compression on these areas of your lumbar spine. Tips to help reduce the stress on your spine include: Avoid running on concrete and uneven surfaces. Instead run on a padded track or soft, even grassy surfaces.