Fitness & Nutrition Guides
Science-backed guides written to help you understand your results and take the right next step.
25 articles
NutritionWhat Is TDEE and Why It Matters More Than Counting Calories
Most people count calories but have no idea how many calories their body actually burns. TDEE solves that. Learn the 4 components and how to use yours.
CalculatorsBMR vs TDEE: What's the Difference and Which One Should You Use?
BMR and TDEE are the two most important numbers in nutrition, but most people confuse them. Here is exactly how they differ and which one to use.
NutritionHow to Calculate Your Macros: A Complete Beginner's Guide
Your TDEE tells you how many calories to eat. Your macros tell you what those calories should be made of. Here is how to calculate them step by step.
Body CompositionWhat Is a Healthy BMI? How to Read Your Results and What to Do Next
You got your BMI number. Now what? Learn how to interpret it, understand its limitations, and decide what to do next based on your category.
Weight ManagementHow to Create a Calorie Deficit Without Starving: The Complete Guide
To lose fat, you need to eat fewer calories than your body burns. That gap is called a calorie deficit. Here is how to create one without starving yourself.
Weight ManagementThe Difference Between Cutting, Bulking, and Maintenance (And How to Calculate Each)
Cutting, bulking, and maintenance are the three phases of body composition management. Here is what each one means and the exact calorie targets for each.
Body CompositionBody Recomposition: Can You Really Lose Fat and Build Muscle at the Same Time?
Can you lose fat and build muscle simultaneously? Yes - if you meet certain conditions. Here is exactly who can achieve body recomposition and how.
Body CompositionHow to Use the Army Body Fat Calculator: Standards, Formulas, and What Failing Means
The US Army body fat test uses a specific circumference method with strict standards. Here is exactly how it works and what to do if you are close to the limit.
StrengthWilks Score Calculator: What It Is and How Powerlifters Use It
The Wilks score lets you compare powerlifting strength across weight classes. Learn what it is, how it is calculated, and where you rank.
CardioVO2 Max Explained: What Your Cardio Fitness Score Actually Means
Your smartwatch says your VO2 Max is 42. Here is what that actually means, where you rank for your age, and how to improve it.