As a runner, all three Janu Sirsasana variation are poses I always include post-run in order to increase flexibility in my hamstrings. They all stretch my legs differently though. Janu Sirsasana A, where your foot is next to your inner thigh, is a nice relaxing hamstring stretch, perfect when the backs of my legs are really tight after a long run. Janu Sirsasana B, where you sit on your foot, gives me a much deeper hamstring stretch. Then there's Janu Sirsasana C, the weirdest of the three, which is great for stretching out the muscles in your foot. So which variation do you like best?