I think that one of the biggest problems is portion sizes combined with our society.

I remember a while back a subject that I saw on reddit that was about how people from other countries viewed ours after visiting us.  By far the most popular subject brought up was portion sizes at restaurants.  We're not talking just fast-food here, it's everywhere.  I'm by no means a "big eater", never have been and don't have the desire to be.  One of the reasons that I don't go out to eat more often is because more times than not I'm served far more than I can eat.

Our society is all about "super sizing" and "the big gulp".

Combine that with the fact that many people spend far too much time on their phones, computers, etc. and far less time doing active things.  I personally am guilty in that I am not near as active as I was in my younger days, but take a look around...  I work on one of the Navy bases here, and I see far too many sailors sitting/standing around looking at their phones rather than interacting with others.  Sure military members have to maintain some level of fitness, but they don't seem to be nearly as active/interactive as it used to be when I served.

We are lazy.  The building that I work in is perhaps a quarter mile away from the McDonald's on base, yet I've seen many people actually get in their car to go get something to eat from the drive-thru rather than just walk the less-than 5 minute walk to mickey D's.

Another example is something as trivial as doing chores around the house.  Take for example mowing the lawn.  We have "self propelled" mowers and riding mowers galore.  I see some of my neighbors mowing their lawns riding on a lawn tractor, even though their lawns are probably 1/8th of an acre at best.

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