When we hold yin posture (no muscle activation-just relaxing the body) for over 90 seconds this stimulates cells in our connective tissue called fibroblasts to lay down additional collagen tissues/connective tissue. This is prompting the production of younger, new cells. It's a scaffolding system that gets more layers and deeper in the body. Then our joints feel better and suddenly we feel younger. Try holding a yin posture like this one that is relaxing for a few minutes consistently and watch