I've been doing tae kwon do for 2.5 years. My husband and two sons also do TKD, and there are some classes we take as a family. (We'll all be testing for our black belts together in about 16 months!) I hugely enjoy it, and I consider it part of the "play" of TPB fitness. (Except for TKD tournament class, which is a little bit of hell.) I hugely enjoy doing forms, and there's something very empowering about breaking boards with my bare hands and feet. Of course, there's sparring, and all the kicking/punching drills we do to help us with our sparring. My husband and sons love that part of TKD; while I don't love it, I do like how I've gotten much stronger and faster. And, admittedly, I feel like a total badass.