For Barbara Knickerbocker Beskind, a nationally renowned occupational therapist in her early 90’s, good physical health isn’t just a matter of good luck or genes. For her, and those she treats, the advice is clear: It’s all about bone density and balance, and that being proactive from an early age can really pay off. Her basic prescription? Good posture and a brisk 30 minute walk every day. A strong gait and good balance go a long way toward avoiding falls and injuries as you grow older. So stand up straight and Read This.