Well, I'm 38 as well - 39 in December. I'm far from the fastest through the workouts, and I try to listen carefully to what my body is telling me, but so far no injuries.

I am on the older side of the folks at the gym. (I have no idea how these kids afford it - it was a major budgetary decision for me to join. But then, I suppose they have no mortgage to pay or kids to feed!) There is, however, a 65 year old woman who is a regular. She goes slow, and uses light weight, but she does the workouts!

So far, I'm really impressed with the program.