The world around us is changing. Our personalities, and even our physical appearance, change over our lifetimes. So, too, do our diets and bodies. It is hard to get into a perfect body shape. Sometimes we make a goal and then move on when we achieve it. Sometimes we lack the motivation to maintain a nutritious diet. Sometimes, it is hard to maintain a regular exercise routine. According to studies, more than 60% of American people do not do the required level of physical exercise, and more than 25% of people are not active at all.