Physically Fit 57 year old

Dear Dr. Vanderslice,

I am a vigorous 57 years old with general good health and an active lifestyle. I have been physically active and aerobically fit, all of my adult life, hiking, jogging, biking, playing soccer and racquetball, practicing yoga, etc. occasional weight training and generally considered in excellent shape and physically fit by my friends and acquaintances. However, in the summer of 2003 I began to experience pain in my upper back.