If you engage in any sort of athletic endeavor, you know that any stretching you do tends to emphasize the lower body, if you even stretch at all. It makes sense: Your hamstrings, quads, and calves ...

A herd of toddlers runs across the springy gymnastics mat, each to a small square of carpet. Their parents follow close behind. Once seated, coach Marci Schuster takes them through some warm-up ...