During my younger years I was very physically active and managed to maintain a healthy weight, despite consuming a terribly unhealthy diet. However, since most of us move less as we age, adjustments to diet must be made to avoid disease, illness, pain, and depression. In other words, proper nutrition must ultimately be addressed to avoid an unhappy and unhealthy you in the teenage years and beyond.
Even though your upbringing is just one factor that may play a role in your current physical condition, there seems to be other major contributors to the increasingly heftier and unhealthier American population. How so?