I have been a fan of Esssentrics for years. I have had problems with my left knee because of Arthritis and my workout with Essentrics kept me going to my Contemporary Dance class, hip hop and ballet. I finally had a total knee replacement because it was the only way to deal with the Osteoarthritis in my left knee… although I was not in pain, I decided to do it while I had more years of dance in me… I am 81 years old. I am now in rehab for my knee and was just given the go -ahead to do Esssentrics. I just love the gentle stretching and the wonderful instructors. I will continue with Essentrics and hopefully get back into my dance classes.