I started at IronFire in January of 2011 at age 53, although I have been a runner and mountain biker for 20 years I had no upper body strength. IronFire changed all that. By building up my muscle strength in the upper body, the soreness in my right shoulder has gone away. My favorite part of IronFire is that the workouts change daily. Jason is great and the other people in the classes are very friendly. You never get tired of people telling you how in shape you look!