For people looking to age more gracefully, building muscle has long been looked at as the gold standard. While retinol creams and Botox may keep those unwanted wrinkles at bay, nothing reduces your risk of serious injuries from falls, improves your posture, and ups your testosterone levels quite like hitting the weights. New research is even showing that not only are people with higher levels of muscle loss more at risk of falls and fractures, but also have a greater risk of cognit...