I have seen Dr. Colberg for my knee. I am 61 years old (female) and have been working out with heavy weights for 2 decades. I initially saw another doctor at another clinic who told me to stop lifting, due to my age. I was horrified. On my first visit with Dr. Colberg I was afraid of the same prognosis, but his advice was the opposite. I am extremely pleased. His ability to give injections which, I barely feel is amazing! And, I'm still at the gym.