Hi guys, Welcome to the Advanced Video Search Engine, and you are watching What is Sleep Restriction Therapy? | Dr. Matthew Walker, Author of "Why We Sleep" | CBT-I. That video is uploaded by Tim Ferriss at 2023-02-17T07:18:09-08:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [nsOCpXNFDRQ]