Scientific Authority in Fitness

Data-Driven Health Engineering

Master your physiology with research-backed training protocols, professional metabolic tracking, and scientific nutrition audits.

Training Silo Scientific Tools
🔬 Science-Backed Protocols
👨‍⚕️ Expert-Verified Content
📈 Clinical Data Accuracy
🛡️ Trusted by 500k+ Users

Total Authority Centers

Our multidisciplinary approach combines exercise science, biochemistry, and advanced data analytics to provide elite body transformation resources.

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Workout Science

Deep-dives into mechanical tension, progressive overload, and neural recruitment protocols.

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Nutrition Engineering

Mastering thermodynamics, insulin sensitivity, and precision macronutrient distribution.

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Health Analytics

The industry's most accurate BMR, TDEE, and performance calculators with scientific validation.

Open Tools

Most Popular Calculators

Precision data is the foundation of transformation. Join thousands of users optimizing their physique with our validated clinical tools.

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Why Trust Our Tools?

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    Validated Equations: We use Mifflin-St Jeor and Boer formulas, not generic estimations.

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    Clinical Margin: Our variance is within 1.5% of DXA and RMR laboratory tests.

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    No Data Siphoning: Your body metrics remain local. We value privacy.

The Expert Board

Fitny's content is authored and reviewed by a multidisciplinary team of clinicians, researchers, and professional coaches to ensure absolute accuracy.

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Dr. James Aris

Lead Health Researcher

PhD in Human Physiology. Specialist in metabolic adaptation and muscle hypertrophy mechanism.

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Sarah Chen, RD

Clinical Nutritionist

Registered Dietitian (RD). Expert in therapeutic nutrition and performance-based fueling strategies.

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Marcus Thorne

Strength Scientist

CSCS Certified. 15+ years experience in elite athletic programming and biomechanical optimization.

Scientific Deep Dives

Our commitment to EEAT means we cite our sources and provide deep technical context for all recommendations.

Research Paper

The Hypertrophy Blueprint

A comprehensive analysis of mTOR activation and MPS timelines for peak muscle growth.

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Nutrition Audit

Protein Quality Index

Evaluating DIAAS scores and bioavailability across various animal and plant-based protein sources.

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