Even if you don't care about leg development, lower body training will help upper body development through a greater release of growth hormone. (onnit.com)
Nothing beats squats when it comes to lower body development. (fitnessandpower.com)
Additionally, with increased mobility and brain / body development at the age of 6 months, breastmilk and formula no longer contain all of the nutrients that babies need, particularly iron. (momtricks.com)