Most people think of stress as episodic - something arrives, you deal with it, it goes away. The nervous system doesn’t really work like that. Arousal that isn’t resolved doesn’t reset to zero. It carries forward, stacking onto the next thing, and the thing after that. By the time you’re lying in bed at 11pm wondering why you can’t wind down, the answer is probably something that happened at 9am.
This isn’t abstract. Elevated cortisol that persists into the evening actively suppresses the drop in core body temperature that precedes good sleep onset. It blunts growth hormone release during slow-wave sleep. It keeps inflammatory markers slightly elevated in ways that slow soft tissue repair. None of this is dramatic enough to notice day-to-day, but across weeks and months it shows up as stalled recovery, mood that runs slightly flat, and a kind of low-level physical dullness that’s easy to misread as laziness or overtraining.
The specific mechanism matters here. The stress response is a physical event - adrenaline, cortisol, elevated heart rate, altered digestion. These aren’t psychological states that vanish when you decide to stop worrying. They require physiological resolution. That means something that moves the body toward parasympathetic dominance: prolonged exhale breathing, slow walking, genuinely non-demanding social contact, deliberate physical stillness. Scrolling doesn’t do it. Watching intense television doesn’t do it. Lying in bed thinking about your to-do list definitely doesn’t do it.
The Resolution Problem
The reason unfinished stress accumulates is that most modern stressors don’t have a physical conclusion. You sit in a difficult meeting, produce cortisol and adrenaline, then sit at your desk for another three hours. The hormonal output had nowhere to go. Animals in the wild complete the stress cycle - they run, they fight, they shake, and then it’s done. The chemistry clears. We skip that entire step and wonder why we feel wired and exhausted simultaneously.
Intentional decompression isn’t self-indulgence. It’s the missing physical step that your nervous system is waiting for before it will permit proper recovery. The people who consistently sleep well and train well tend to have some version of this built into their days - not as a treat, but as maintenance.
If your recovery is poor and your sleep feels shallow, the first question isn’t what supplement to take. It’s how many stress cycles from the past 48 hours you actually closed.