Taken to extremes, though, there is a trade-off. Keeping generally fit is probably within the reach of most nerd-types and helpful for their mental state. However, actually being physically competitive at a high/elite level requires investing a lot of time in training, diet plans, etc. Similarly, being an elite programmer (or anything else) requires investing a huge amount of time in the craft. I imagine that people who manage to achieve both peak physical fitness and peak mental ability are rare outliers.

The stereotype of nerd as sedentary applies to me, to an extent. I think this is because, genetically, I have a number of physical problems, and also come from a poor background. For most of my youth, I was unable to achieve at a competitive level due to these problems - I have never won a single race, medal or trophy (as where I am from, they are only given out for sporting achievements). However, when I got a computer, my life changed. Suddenly I could create and achieve using nothing other than a keyboard and an internet connection. So in my case, the sedentary nature of my existence probably drove me toward computers, rather than the inverse.

Mens sana in corpore sano.

You should pray for a healthy mind in a healthy body.

Ask for a stout heart that has no fear of death,

and deems length of days the least of Nature's gifts

that can endure any kind of toil,

that knows neither wrath nor desire and thinks

the woes and hard labors of Hercules better than

the loves and banquets and downy cushions of Sardanapalus.

What I commend to you, you can give to yourself;

For assuredly, the only road to a life of peace is virtue.

https://en.wikipedia.org/wiki/Mens_sana_in_corpore_sano

I think this myth emerges from the high-school jock vs nerd archetypes. The HSJ spends his time training, chasing chicks and neglecting his studies, while the more studious get on with their school work. Of course in reality you have smart people that are all-star footballers and stupid people who study, but I guess the less nuanced picture still dominates people conscience. I guess particularly because the school years are most formative.

To add to that, lifting heavy weights causes the central nervous system to fire off huge amount of electrical signals to muscle groups. While this does cause fatigue which can leave you feeling "hazy", I would not be surprised if it improved cognitive endurance for other tasks. And I have to comment on the irony of sleep being the most important factor in muscle recovery, along with a good diet.

> It is a myth--the brain is a part of the body and by nurturing the body you support the brain.

Is there any evidence backing this up? I hear it proclaimed a lot, but there are plenty of examples of brilliant people who are not physically strong, such as Stephen Hawking.

> There is a myth that physical ability is a trade-off against mental ability.

It's not a myth that time you spend, e.g., in the gym is time that's not available for, e.g., programming practice, and vice-versa. Ability beyond raw potential takes time to devop and maintain, and time is a limited resource. TANSTAAFL.

I prefer to view it in reverse (and word it differently) - the body is an organ of the mind.

But I would agree - the mind and body are powerfully complimentary.