This is a short post with some definitions and statistics about obesity. They will be helpful to understand upcoming posts on the health consequences of physical inactivity and how inactivity and obesity are linked.
First, what is BMI? BMI stands for Body Mass Index. It is a mathematical formula that factors in height and weight to give a single number that is useful to normalize values for people of different heights. This link is to a CDC site about obesity and BMI. Briefly, a BMI of 20-25 is normal, between 25 and 30 is considered overweight, and more than 30 is obese. BMI is not a perfect way to estimate body composition, for example there can be super muscular people who have high BMIs and are very lean. However, for the population as a whole it seems to work. Here is a link for anyone who wants to take a deeper dive into BMI. Using the table below you can calculate your own value. For anyone used to the metric system the table is in feet and pounds because most of my readers are likely in the U.S.
Second, just how fat are we getting as a population? In the last couple of posts I have talked about the pandemic of inactivity related diseases and just how inactive most people are. Below is a CDC video showing the trends in obesity by state in the U.S. over the last 30 years. You can see there is also an obesity epidemic going on in parallel with the inactivity problem and about 35% of the U.S. population is now obese and somewhere between 60-70% are either overweight or obese. The CDC website has more data on obesity for those who are interested.
click here for video
The data and video speak for themselves and there is no need for much editorial comment except to say it is a very, very disturbing situation. In coming posts I will make the case that less physical activity has caused this problem and that more physical activity and exercise are key to addressing it.
This entry was posted on Monday, August 20th, 2012 at 6:08 am and is filed under Current Events, Research and Health. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.