Health & Fitness

Devine, Robinson, Miller, Hamwi — the classic ideal weight formulas disagree. Here is what each says and why a range beats a single number.

Macronutrients are the three sources of calories in food. Here is what each does, how many calories they carry, and how to split them.

Your resting heart rate is a simple window into cardiovascular health. Here is what the numbers mean and how to lower yours.

The famous 10,000 steps figure came from marketing, not science. Here is what the research actually shows about daily step counts.

Every diet works by creating a calorie deficit. Here is how to size one safely and why extreme cuts backfire.

Body fat percentage tells you what your weight is made of. Here is how the common estimates work and how accurate they really are.

BMI is a fast screening number, not a diagnosis. Here is how it is calculated, what the categories mean, and the well-known cases where it misleads.

Your BMR is what you burn at rest; your TDEE is the full daily total once you add movement. Understanding both is the foundation of any weight goal.

The “eight glasses a day” rule is a myth with a kernel of truth. Here is what actually drives your hydration needs and how to tell if you are getting enough.

Due dates are estimated from your last period using Naegele’s rule — but only about 1 in 20 babies arrives on the exact day. Here is what the date really means.