No, I don't think what you're saying is frivolous; I think it's very important. The first comments I made were that we can't separate the issues of obesity and inactivity from diet. We can't say that to be healthy you just have to exercise. Here we have experts on the physical activity piece, and that is why we're addressing it. You have had many experts who have spoken about the nutrition piece; I am not a dietitian. I know that it is an equation. I know that when you are physically active, not only are you burning calories but you're also changing your body composition, you're building muscle, and all of that has a long-term impact.
And it's not just about weight; it's about heart health and bone health. Weight is the visible sign for a lot of people that somebody is out of shape, but it's not the only sign. There are many young people who are very thin but do not have adequate lung capacity and do not have adequate bone density. For instance, one of the things I learned is that young girls develop 23% of their bone density between the years of 12 and 14, and that's the exact age when young girls drop out of sport, drop out of structured activities, and often don't have a fallback of unstructured activities.
So there's a strong correlation, and your comment was not frivolous. Parents are buying the food, and economics is involved here as well. When you look at the poorest communities, what is the food source in those communities? Where is the local store? If it's a 7-Eleven, we have a real problem. We should be really looking at the kinds of stores we're putting in the poorest communities and, in an ideal world, making the best food the cheapest food.
But these opinions take some time to change. It's about education, yes, to a certain extent. It's also about planning our communities in a better way, giving the poorest communities in our country access. One of the statistics I looked at recently is how economics relates to obesity and how single moms in this country are our poorest citizens, which actually means that children are our poorest citizens. And those children have a higher risk of being overweight and obese.