I didn't start taking yoga very seriously until a year ago -- but when I really started attending classes regularly and focusing on the breathing, postures and form of the entire practice, my body and my blood sugars were oh so grateful. Being a very difficult but low impact form of exercise, yoga will not hurt your knees and joints the way running or other aerobic sports might -- but I promise, it'll leave you much sweatier and much more out of breath than you think. It is much, much more than...