To whom it may concern: This is in reference to Master Kamal and his yoga teachings. I am a 69-year-old Martial Artist who has recently had both hips replaced. 50 plus years of karate practice and competition in Kata and sparring can have its effects on the body. Although the surgery went well and I am quickly on the road to recovery, I needed something else to get back the movement and flexibility of the hip joint which is so important for Japanese Martial Arts.