Every time I read an article like this, I get a bad feeling and I say to myself "I'll definitely exercise more - I don't wanna be all buggy when I get older due to my lifestyle - I'll do this NOW!". Then a couple of hours later, I'm back coding happily seated. I'm sure this is the case for many of us. I wish our brains could keep this bad, guilty-like feeling that makes us take action around for longer.
Most of us have standards around hygiene, dental care, personal appearance etc that are almost immutable.
If you have a standard that you want to remain fit and that becomes deep-rooted then there is nothing to think about. It will happen.