the.com/stress monitoring
turning your cortisol levels into a dashboard nobody asked to see but can't stop checking.
means the practice of tracking physiological or self-reported signs of stress over time to spot patterns before they spot you.
from grew out of 1970s biofeedback labs measuring heart rate and skin conductance, then went mainstream once wearables put a lab on your wrist.
heart rate variabilitylow variability often flags stress before you feel it
cortisol lagstress hormone peaks 20 minutes after the trigger
skin conductancesweat gland activity betrays stress in milliseconds
for instance
whoop strap — tracks recovery scores from resting heart rate, used by nfl players since 2019
apple watch mindfulness — pings users after detecting elevated heart rate spikes
oura ring readiness score — combines hrv and sleep to predict daily stress load
nasa biofeedback training — astronauts monitored for stress before spacewalks since the 1990s