Tape Test History: How the Circumference Method Estimates Body Fat
Estimate body fat with a tape measure. The method’s origins, how to measure and what its limits are.
Fitness & Health Articles
Guides and formula histories for our fitness & health calculators.
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BMI History: Quetelet’s Index and Why It Has Limits
BMI began as a statistical tool in the 1830s. Here is how it works, where it falls short and what is changing.
Mifflin-St Jeor Equation Explained: BMR, TDEE and Calories
The equation behind most modern calorie calculators, where it came from and how to use it well.