Im considering a TKD class in additon to my Tai Chi training. It ought to be an interesting culture shock for me. At 38 yrs old, I am the youngest person in my Tai Chi class. I doubt that will hold true if I take the TKD. The good news is I already know the instructor at the TKD school - he trained my kids for a few months. Im hoping that will help the "old guy" feelings when I start out.