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If you feel guilt ridden for being a lazy son of a gun then this is the post for you. You are literally wired to be lazy and it is a valuable survival instinct.

Humans evolved in the natural environment where food had to be either gathered or hunted. Then it had to be prepared and cooked if you were a human who lived after fire was harnessed for our use.

That meant using a lot of energy each day and it also meant that food was not always plentiful.  It is therefore brutally apparent that an important survival advantage would to be lazy, conserving your energy for the next day's struggles.

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It boils down to a simple equation:

Energy In - Energy Out  &ge; 0

In words, the net energy balance needs to be greater than or equal to zero for an organism to survive.  If the energy in side of the equation is small or unstable then it makes sense for your nervous system to drive you towards inactivity (see [Energy Homeostais](https://en.wikipedia.org/wiki/Energy_homeostasis) for a deeper technical description) .

Creatures that wasted energy on useless activities would tend to survive at lower rates and their genes would not be propagated into the next generation. Those that were thrifty survived and had more kids. These people were your ancestors.

Your average cave man or cave woman never said, "Hey it's a nice day, I think I'll go for a 10 km run". Instead he or she would look around to see if the tribe or clan had enough food for the next few days and if this was true they would just settle down and go for a nap.

If it were not true then they would go for a 10K run, ..., after a deer or elk.

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These days food comes from the grocery store and very few of us grow, gather, raise or hunt our food. The energy balance equation these days has become:

Energy In - Energy Out  &gt;&gt; 0

In words, this equation is saying that we modern humans tend to take in much more energy than we expend. The end result is that the gravitational field of many people may be influencing the orbits of Mars and Venus (i.e. some of us may be getting quite massive).

For basic health reasons then it might make sense these days to start emulating our ancient ancestors. Eating less food that is also more natural and packed with fewer calories (but is still nutritionally dense) and to chase down imaginary deer and elk.

It's hard though because we are literally wired to be lazy. In the old days hunger would drive people to get up and get food and be lazy when they got that food.

We now have that food in our fridges and cupboards all of the time. Our brains therefore instinctively tell us that we need to take a nap, or lay down on the couch and play a video game. Your genetics honed by millions of years of evolution are now working directly against your best interests.

#### Closing Words
The recent abundance of easily available food is both a blessing and a detriment. 

Your wiring is driving you to be inactive so don't be too hard on yourself for opting for the couch instead of that 5K jog.

*Thank you for reading my post.*

#### Post Sources

This post was inspired by this [image](http://3.bp.blogspot.com/-fMN2fEmxF3I/TnisfWv1OVI/AAAAAAAABn8/sefHvU4MvME/s1600/76.jpg) from this [website.](http://www.snotm.com/2011/09/76-youre-not-lazy.html)
https://en.wikipedia.org/wiki/Energy_homeostasis
http://bigthink.com/wikimind/is-human-laziness-human-nature
http://time.com/4027942/lazy-walking-exercise/
http://andypitt.com/networkmarketing/why-are-people-naturally-lazy/