The five stress signals worth tracking every day

Surveys of what stress does to people keep producing the same list. In the American Psychological Association's Stress in America work, the most reported physical symptoms are fatigue (about half of respondents), headaches, an upset stomach, muscle tension, changes in appetite, and lying awake at night. That is a useful starting point, but tracking fourteen symptoms is how tracking dies. These five earn their place because they are quick, they move early, and between them they cover the body, the mood, and the mind.

Not sleep quality on a ten-point scale, which people rate badly, but two facts: roughly how long, and whether you woke in the night. Stress shortens sleep and fragments it, and short sleep in turn makes the next day's stress land harder. This is the signal with the clearest two-way relationship to everything else, so it goes first. The stress-sleep loop explains the mechanism.

How you feel on waking, before coffee and before the day has asked anything. A single 1 to 5. This is the one that catches the exhaustion dimension of burnout months before the crash, because exhaustion shows up as "tired before the day starts", not "tired after a hard one".

Patience is one of the first things stress spends. Ask: how short was I with people today, or how short would I have been if given the chance? Irritability is a better signal than "feeling stressed" because people notice their own impatience more readily than their own load, and because it flags mental distance, the second burnout dimension, early.

Most people have one place stress lands: jaw, shoulders, gut, chest, a headache behind the eyes. Note whether that place was quiet, tense, or bad. Physiological stress and self-reported stress correlate only weakly, and this is a way of letting the body report separately from the mind.

How expensive did routine things feel: answering an email, making a decision, a phone call you would normally not think about? This is the most sensitive of the five. Output can hold for a long time under stress. The effort required to produce it climbs first, and only you can see it.

They are all things you can answer in a few seconds without a device. They are each about a different system (sleep, energy, mood, body, cognition), so they do not just repeat one another. And each of them tends to move before the point at which someone would say "I'm stressed", which is the point. Why you only notice stress when it's too late covers that gap.

Heart rate variability and resting heart rate are worth adding if you already wear something that measures them, as a sixth and seventh signal, but they are noisier than people assume and are not a replacement for the five. HRV and stress and Resting heart rate cover how to read them.

Rate all five at the same time each day. Morning works best because the first four are about how you arrived at the day, and the fifth can be answered about yesterday. Then, once a week, look for which ones moved together and what was different on those days. The five signals are the "what"; How to track stress, the pillar for this series, covers the "how", and How to read your own stress patterns covers what to do with the comparison.