About Us – Endutrition

ABOUT US

At SPACS, sports science isn’t just what we do — it’s who we are.

We exist to turn cutting-edge science into powerful performance outcomes. Whether you’re a pro chasing podiums, a dedicated amateur striving for your next breakthrough, or a coach seeking smarter tools for your athletes — we’re here to elevate your game.

Our approach

Our approach is grounded in real-time, real-world diagnostics, using the most advanced performance tech available today:

Metabolic analyzers
SMO₂ sensors for muscle oxygen profiling
Core body temperature tracking
Breathing frequency & ventilatory efficiency testing
Mitochondrial limitation diagnostics
Calorimetry for energy system analysis

We don’t deal in averages or assumptions. Every decision we make is backed by precise data — collected where it matters most: in the environments where you train, compete, and push your limits.

Our team partners with top researchers, elite coaches, and performance specialists to ensure you’re not just training harder — you’re training smarter, with purpose, and with science on your side.

Because true performance isn’t luck or talent alone — it’s measurable, repeatable, and trainable.

If you’re ready to leave guesswork behind and unlock the next level of your potential — let’s connect.

SPACS. Precision-driven performance.

The Founder

Jacek Marciniak, age 48 — Founder and Owner of SPACS – Sport Physiology Analysers Consultancy & Sales. Sports physiologist, sports dietitian, endurance specialist and triathlon coach.

Professional background

Graduate of the Faculty of Law, Administration and Economics at the University of Wrocław. He specializes in endurance sports and advanced diagnostic methods. He currently supports research at the University School of Physical Education in Wrocław on “The role of hypercapnic warm-up in the development of anaerobic capacity,” supervised by Dr. Rafał Hebisz. He collaborates with the Polish Athletic Association (PZLA), the Polish Triathlon Federation (PZTri) and the Polish Ski Association (PZN).

Certifications and expertise

He provides metabolomics analysis and official VO₂ Master Mobile Laboratory services for guided metabolic and performance testing. He works as a sports dietitian focused on endurance sports. He holds a USA Triathlon Academy certificate in Muscle Physiology and Training and a USA Triathlon Federation credential as a Certified Master Instructor in Muscle Oxygenation Physiology & Coach degree. He is a Certified TrainingPeaks Coach, certified in CORE body temperature and heat-training methodology, and an instructor of respiratory muscle training using the isocapnic method. He holds a Professional Diploma in Sports Nutrition for optimizing athlete performance and recovery, certified by the FC Barcelona Innovation Hub, and he is both a triathlon certified coach and a certified swimming instructor.

Athletic career

Active triathlete and ten-time IRONMAN finisher. World Championship participant at IRONMAN Kona 2022 (Hawaii, USA) and the IRONMAN 70.3 World Championships 2018 (Port Elizabeth, South Africa). Selected results include: 1st place in age group at IRONMAN Finland 2022; 2nd place in age group at IRONMAN Andorra 2023; 4th place in age group at the IRONMAN South American Championship in Cozumel 2024; Vice-Champion of Poland in Long Distance Triathlon (ITU, 2018). Earlier he competed in swimming and played basketball for Śląsk Wrocław.