by guest blogger Holly Walck. Every spring, I’ve seen my students come in with the “tricky low back” that resurfaces after hours spent bent over flower pots and vegetable beds (with the errant “football knee” or “tennis elbow” flare-up to sweeten the deal). Fortunately there are yoga postures that stretch the arms, legs, and spine and put muscles that have been revolting back into a state of deep rest.