Founder & Editor
Albert Mateos
Founder of FitCalcs. Software developer focused on translating peer-reviewed sports science into accessible, free fitness calculators.
About
Albert is the founder and editor of FitCalcs. With a background in software engineering and several years immersed in evidence-based fitness research, his focus is on translating peer-reviewed sports science (Mifflin-St Jeor, ISSN position stands, IOM guidelines, Tanaka heart-rate research) into accessible calculators that anyone can use without a sign-up. He is not a licensed medical professional, which is why every calculator on FitCalcs links to its published sources and includes clear disclaimers pointing users to qualified clinicians for personalized advice. Albert reviews every formula and FAQ for accuracy before publication and updates content when new research consensus emerges.
Years active
Researching and writing on fitness/longevity topics since 2018; founded FitCalcs in 2025.
Credentials & background
- Software engineer with 8+ years of professional development experience
- Self-directed study of exercise physiology, nutrition science, and biostatistics since 2018
- Reviews 30-40 peer-reviewed papers per quarter from BMJ, AJCN, J Am Coll Cardiol, Med Sci Sports Exerc, JISSN
- Active recreational lifter and runner; logged training data since 2017 informs practical formula validation
Areas of expertise
- Energy balance & body composition (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle)
- Strength programming (5/3/1, StrongLifts 5x5, RP, Greg Nuckols frameworks)
- Endurance training (Zone 2 methodology, Tanaka HR estimation, MAF/180 formula)
- Macro and micronutrient planning (ISSN position stands, IOM DRIs)
- Sports science literature review and meta-analysis interpretation
- Web development with Next.js, TypeScript, and SSG architecture
Connect
Editorial standards
Every article published on FitCalcs follows our editorial policy: peer-reviewed sources, transparent methods, and corrections within 48 hours. Calculator formulas and references are documented on our methodology page.
Disclosure
Albert is not a licensed medical doctor, registered dietitian, or certified personal trainer. The content on FitCalcs is grounded in published peer-reviewed research, but it is not a substitute for individualized professional advice. Always consult a qualified healthcare provider before making material changes to your diet, exercise, or supplement regimen, especially if you have underlying health conditions, are pregnant, or are taking medications.