Science & Performance

Reach your full potential
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Precise fitness calculators and expert guides on strength training and sports nutrition. No BS — just what works.

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Strength training — kettlebell workout in gym

100% science-based

Interactive tools

Precise calculators to optimize your training and nutrition

Macro Calculator

Calculate your daily protein, carb, and fat targets.

TDEE Calculator

Calculate your total daily energy expenditure.

BMI Calculator

BMI and ideal weight using 3 scientific methods.

Workout Generator

Generate a program tailored to your level and goals.

Sports nutrition — protein powder and shaker for strength training

Nutrition

Nutrition: your #1 lever for results

Protein, calories, timing — every parameter matters. Our calculators use research-validated formulas to give you precise numbers, not rough guesses.

Protein needs calculated from your weight and goal

Maintenance calories with 2 scientific formulas

Macro split optimized for bulking or cutting

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Recommended supplements

Top pick

Créatine Monohydrate Nutrimuscle

Créatine Monohydrate Nutrimuscle

Pure Creapure® creatine, 99.9% purity, made in Germany. The reference for strength and recovery.

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Best value

Whey Native Nutrimuscle

Whey Native Nutrimuscle

Undenatured native whey, complete amino acid profile, ideal post-workout.

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Cellucor C4 Pre-Workout

Cellucor C4 Pre-Workout

The world reference in pre-workout. Explosive energy, focus and endurance for every session.

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Guides & Articles

Expert content based on scientific data

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nutrition· 8 min

How Much Protein Per Day for Muscle Building?

The question comes up all the time: how many grams of protein do you need per day to build muscle effectively? The science has a clear answer.

programs· 12 min

Beginner Muscle Building Program: The Complete Guide

Starting strength training and want to build muscle effectively? Here is a 3-day/week Full Body program based on fundamental compound exercises.

nutrition· 7 min

TDEE: How to Calculate Your Caloric Needs?

TDEE (Total Daily Energy Expenditure) is the foundation of all sports nutrition. Understanding this number means understanding how much you need to eat to progress.

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