The problem with exercise is that we have evolved to be energy efficient and this includes being lazy when we have food/shelter so the resistance to it is high.
However once we start exercising for any period of time and observe the positive outcomes then the difficulty drops and it becomes enjoyable.
The problem is peoples expectations and approach.
> Yes, going from a modern sedentary lifestyle to running will feel rough for a few months as you acclimate
This is a terrible idea and for someone who has been sedentary they will likely just injure themselves and/or feel miserable. People don't have realistic expectations. It's better to do something like "couch to 5K" running on a grass or a dirt track. In a couple of weeks they will feel good after a run (if they are not too distracted and outward looking) then from there the runners high reinforces the behavior and they will look forward to exercising.
However once we start exercising for any period of time and observe the positive outcomes then the difficulty drops and it becomes enjoyable.
The problem is peoples expectations and approach.
> Yes, going from a modern sedentary lifestyle to running will feel rough for a few months as you acclimate
This is a terrible idea and for someone who has been sedentary they will likely just injure themselves and/or feel miserable. People don't have realistic expectations. It's better to do something like "couch to 5K" running on a grass or a dirt track. In a couple of weeks they will feel good after a run (if they are not too distracted and outward looking) then from there the runners high reinforces the behavior and they will look forward to exercising.