On a beautiful late summer day in the Rocky Mountains, I joined participants at the Easter Seals Rocky Mountain Village Post Polio Wellness Retreat to teach a class on balance. People from all over the country came to Colorado to participate in classes and activities about living with post polio syndrome – a condition affecting polio survivors that includes muscle weakness, atrophy, and fatigue that can occur many years after recovery from the original illness. Post polio syndrome’s impact on balance may result…