Yeah, I do a lot of yoga-influenced exercises. Learned 'em as a teenager as part of training for amateur boxing. Back then boxing trainers disliked weight training and yoga was more about flexibility and range of motion. Seemed to help. My workouts are a hybrid, mish-mash of yoga, tai chi, boot camp calisthenics and shadow boxing -- the latter is great for upper body conditioning and can be as gentle as upper body range of motion and flexibility training, to an aerobic workout with vigorous effort. Main caution I'd suggest with shadow boxing is to avoid "snapping" punches. While that's fine for young athletes actually training for fights, the snapping motion of a classic boxer like Muhammad Ali or Larry Holmes can be hard on the elbow and shoulder joints.