"Spinal compression" refers to the excessive pressure or squeezing of the spinal cord or the nerves that run through the spinal column. This condition can cause pain, weakness, numbness, or tingling in different parts of the body. Full definition
However, the same group also experienced significantly more spinal compression. (wellnessmama.com)
The seated position with back support eliminates spinal compression. (bodybuilding-wizard.com)
While it's true that deadlifting causes spinal compression (when your vertebrae and discs are being pushed closer together vertically), that's not really an issue for your lumbar vertebrae, since they are designed to deal with compressive forces and your spine can tolerate more force vertically than it can horizontally. (fitnessandpower.com)