About Driftline

The team behind TrueZone.

Based in Reykjavik

Applied physiology, patents, university validation, and a family founder story.

Driftline Analytics is based in Reykjavik, Iceland. The company developed TrueZone, the first unified framework for human physiology — turning ordinary heart rate data into a structured physiological signal.

The framework has been validated across 28,000+ sessions in running, cycling, and team sports. From just three parameters, TrueZone derives VO₂max, thresholds, training zones, race predictions, fat oxidation curves, and recovery kinetics — all individualized, all from data users already collect.

Our mission is to make real exercise physiology accessible to every athlete, coach, and platform — not through more sensors, but through better science applied to existing data.

Team

The people behind TrueZone.

Agnar Steinarsson

CEO

Research biologist with three decades of experience. Currently pursuing a PhD at the University of Iceland, focused on validating TrueZone against gold-standard laboratory testing.

Steinar Agnarsson

CTO

Leads Driftline’s technical development. Specializes in physiological modeling and signal processing — the mathematical framework behind TrueZone. Co-inventor on Driftline’s US and European patents. Father-and-son team with Agnar.

Arnar Pétursson

CFO

73-time national champion in running. Holds a master’s degree in corporate finance. The direct experience of elite athletics combined with financial expertise makes him a natural bridge between the science and the business.

Key Facts

Research, IP, and recognition.

University of Iceland

Active research collaboration with the Faculty of Health Promotion, Sport and Leisure Studies. Two METFIT PhD white papers validating TrueZone against gold-standard CPET.

Patents

Granted: "A method and system for determining exercise parameters including aerobic endurance based on heart rate curve analysis." Pending: "Calorie tracking from heart rate dynamics." Both filed in the US and Europe. Protection to 2045.

EIC Fast Track

Eligible for European Innovation Council fast-track. Eurostars project (Fitsilver) completed in collaboration with CSEM, Switzerland.

Interested in working with us?

Whether you're a researcher, platform partner, or sports organization — we'd love to hear from you.

Get in touch