Many studies are conducted each year to track the current state of American public health, and the numbers show that both children and adults alike should get a little more exercise than they do. After all, good exercise, such as cardio, is how a person can burn calories and fat while developing muscle, and this applies to children, too. A child needs physical activity every single day, and this can keep them in shape and also boost their mental development (as studies show). In many cases, parents can allow their children to play in the back yard, or at a …