My name is En Tzer Yeh. I am a doctor of physical therapy. This channel is about physical therapy. It is about what I know and what I love about physical therapy. It is not medical advice. This is not a business. If you are in pain, you really should seek out your local health care providers. This is just a hobby, not a job for me. If you find it helpful, that's great! If you don't find it helpful, I'm sorry but this is not a business. If you have questions, please consult a medical professional in real life. I would love to communicate with my viewers but I cannot give medical advice over the Internet.