Most people do not experience chronic stress as an event. There is no dramatic collapse, no obvious crisis. Instead it arrives as a kind of ambient noise - a background tension so constant that it stops feeling like stress and starts feeling like just how you are. You describe yourself as a worrier, a light sleeper, someone who takes a while to switch off. You have reframed a physiological state as a personality trait.
That reframing is worth examining, because chronic low-grade stress has concrete downstream effects on the body. Elevated cortisol over time interferes with sleep architecture, suppressing slow-wave and REM sleep even when total sleep duration looks adequate. It blunts anabolic signalling, meaning recovery from training takes longer. It raises baseline inflammation. It affects appetite regulation in both directions - suppressing hunger in some people, driving compulsive eating in others. None of this requires a major stressor. The slow drip is enough.
The threshold problem
One reason people miss this is that they are using the wrong reference point. They compare themselves to how they feel during a genuinely bad period - a bereavement, a job loss - and conclude that what they are currently experiencing is fine. But “not as bad as the worst” is not the same as functional. The nervous system does not grade on a curve.
A better signal is whether you can sit without stimulation - no phone, no podcast, no background noise - and feel neutral rather than restless. Not meditative, just neutral. Most people cannot, and that inability has normalised in a way that would have seemed strange thirty years ago.
What actually helps
The interventions that move the needle here tend to be boring and slow. Consistent sleep timing. Exposure to morning light within an hour of waking, which helps regulate the cortisol awakening response. Genuine rest that is not passive entertainment - walking without headphones, sitting outside, doing something with your hands. These are not cures. They are the difference between a nervous system that is chronically elevated and one that has regular opportunities to downregulate.
Cardiovascular exercise at moderate intensity - not grinding, not zone 5 - has a documented effect on cortisol metabolism and is probably the single most accessible tool available. Most people who train already do this but discount it as not hard enough to count.
The noise in your head has a source. It is not character. It is load - and load can be managed.