Wellness
Every wellness guide we have published, newest first.
6 articles in Wellness
When a Health Number Warrants a Doctor's Visit
Calculators are screening prompts, not diagnoses. Here are the categories of result that deserve a professional opinion, and how to make that appointment useful.
Understanding Health Metrics: How to Read a Number Without Overreacting to It
Every health number carries a population of origin, an error range and a threshold drawn by committee. Here is how to read one without overreacting to it.
How to Build Habits That Survive Month Three
The 21-day figure is a myth with no study behind it. Here is what the research on automaticity, implementation intentions and friction actually supports.
NEAT: The Largest Movement Variable Nobody Tracks
Non-exercise activity thermogenesis varies by hundreds of calories a day between similar people, and it falls quietly when you diet. Here is what the data shows.
Stress, Cortisol and Weight: Untangling a Badly Oversold Story
Cortisol is not a fat-storage switch. Chronic stress does affect body weight, but through sleep, eating and movement rather than a direct hormonal route.
Sleep and Metabolism: What Short Sleep Does to Appetite and Training
Short sleep raises hunger, shifts what you lose on a diet from fat toward lean tissue, and blunts training quality. Here is what the controlled trials found.
Read the guide, then run the numbers
Each article links to the calculators it discusses, and each calculator shows the equation and source behind its output. Every article carries a named author and a publication date. Nothing here is medical advice. Our editorial policy sets out how we source, review and correct what we publish.
Open the toolkit