Using Calories and Macros as a Starting Point
How to interpret calorie and macro estimates without treating them as exact prescriptions.
Guide topic
Health and Fitness Calculator Guides
Guides for calories, macros, BMI, BMR, training pace, heart rate zones and body measurement calculations.
Health and fitness calculators are best used as starting points, not verdicts. They can help set a sensible range, but the result still needs context from training, recovery, body trends and health history.
These articles explain the formulas, the common traps and the places where professional advice matters more than a web estimate.
Health articles
Guides in this topic
Health and fitness guides with careful limits around estimates, trends and screening measures. Start here, then move through the numbered pages when the topic continues.
BMR, TDEE and Calories: What Is the Difference?
Understand basal metabolic rate, activity estimates and how they become a daily calorie target.
Heart Rate Zones for Running, Cycling and Fitness
How to use heart rate zones for easy training, threshold work and recovery without over-reading the numbers.
BMI, Body Fat and Waist-to-Hip Ratio Compared
What common body measurement calculators can and cannot tell you about health context.
Calorie Deficit, Maintenance and Surplus: How to Choose
How to move from estimated maintenance calories to a fat loss, maintenance or muscle gain target.
Running Pace vs Speed: What to Use in Training
How pace, speed, distance and heart rate zones work together for runners and cyclists.