why “no excercise = tiredness” but “excercising = energy”
In: Biology
This has to do the with arousal systems in your brain. Exercise releases cortisol and adrenaline and activates the sympathetic nervous system (increased heart rate, increased alertness and arousal) and activates the reticular activating system.
That makes you feel more awake . Also release growth hormone and other endocrine things.
Among other things which have nothing to do with load or mitochondria. Or stacking. Or supercompensation (all of these ar bro science and not actual science).
Think of it this way. Humans (not all animals but humans in particular) have a really use it or lose it policy. If you dont need to pay attention, because ain’t nothing happening, then conserve the energy and be quiet and don’t move. Another way to think about it is that up until the last couple hundred years you would have been having to move around at least a little bit to do anything at all -even the easiest of cooking would have required poking a fire, stirring while separating your warring children , and peeling off inedible parts from edible parts of plants. So not weightlifting but you would have been walking and moving almost conststantly. Untill it was time to go to sleep. When the long time of inactivity signals the depression of the reticular activating system so that you can do that.
It is only with the advent of very modern living that you would have ever really been able to be totally still except your thumbs while scrolling for any really long time.
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