A nervous system reset is a short practice, usually some form of slow breathing, that lowers your physical arousal for a stretch of time. It works, within limits. What it does not do is change where your body settles back to. That is why the calm you found at 2:40pm is gone by 3:05, and why the problem is almost never that you picked the wrong technique.
You know the sequence. Something lands badly in a meeting. Your chest tightens, your jaw sets, and you run the thing you read about: four in, seven hold, eight out. It helps, for roughly as long as it takes to open the next tab. By the time the 3pm starts, you are back where you were, and now you also feel like the breathing failed.
It didn’t fail. It did the only thing two minutes can do. The gap between what these practices deliver and what readers expect of them is where the frustration lives.
