Upper Back
Lower Back
Watch Tutorial
https://www.youtube.com/shorts/_KVE3qEytJ4
https://www.youtube.com/shorts/SAvPkMKTgwI
https://www.youtube.com/shorts/5OIYBmBPImk
Place the foam roller horizontally across your upper back.
Support your head with your hands and gently lean backward over the roller.
Hold the extension for a few seconds before returning to a neutral position.