Are people constantly getting fatter, dumber and lazier?

I have heard that in Las Vegas, for instance, some people are so fat that they ride around in motorized scooters. Moreover, I know of relatives in my family and they seemed to pack on quite a few pounds in just several years. What of all the skinny guys back in, say, 2006? Are many more people, including men, just getting plain fatter, dumber and lazier in general? Is it getting to the point where monstrous couch potatoes are becoming normal and acceptable? It would also appear that, because of the worsening obesity epidemic, people are getting lazier. Quite apart from all the video games, cellular phones, internet and a host of other technological gadgets. Also, due to obesity, people are getting dumber since fat people have less brain tissue, on average, than their thin counterparts. Tell me I'm wrong or right.