Why does it seem like we can improve our bench press, minutes-per-mile, or alcohol tolerance much more than we can increase our IQ? Can a person with a 100 IQ get a 120 score after training? 130? Seems quite believable to me.
My intuition is the opposite - training burns calories for no other goal than to improve physical performance in the future to gain a better ability obtain calories (or avoid predators) - evolution would select strongly against Only humans have the reversed selective pressure
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Basically, always give you the minimum performance that keeps you alive to minimize calories *then* add on muscle as needed to perform the needed labor to keep you alive. Humans have a very weird environment compared to animals.
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If a dog is doing something repeatedly, it's probably because it needs to survive and those the body would allocate resources towards making the dog better at that thing. I'm going to ask Twitter.
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