For instance, does your home town or city have lots of cycle lanes to encourage you to get on your bike? Or plenty of parks, green spaces and car-free zones that inspire you to get active outdoors?
If not, chances are you drive everywhere and spend more time on the sofa than you do working up a healthy sweat - so no wonder you're not shifting any weight.
More walking, less driving
The researchers, from Tennessee University's Obesity Research Center, discovered people who live in towns and cities where walking and cycling are encouraged are less likely to be overweight than those who live in places where using their car is the only way to get around.
So if you're serious about wanting to shape up, maybe it's time to make that move you've been thinking about lately.
If, on the other hand, you've ever thought about moving abroad, here's an ideal reason. The Tennessee experts also analysed information from 14 countries and found the following have the most energetic populations (note the conspicuous absence of the UK from the top five):
- Switzerland (where 50)
- Spain (35)
- Germany (32%)