Guides for smarter fitness numbers

Macros sound complicated, but the idea is simple. Here is what each macronutrient does and how to set a sensible starting split.

Total Daily Energy Expenditure is the number of calories you burn in a day. Learn how it is estimated and how to use it.

Body mass index is one of the most used health screening numbers. Here is how it works, what the categories mean, and where it falls short.