Train by the numbers.
Race by feel.

TrainingZonesOS is the operating system behind TrainingZones.io, the free, science-backed training zone platform for endurance athletes.

Recovery → Endurance → Threshold → VO2max

⚙ Founder Dashboard

What Polsia Does

An autonomous growth engine for your training platform

Polsia handles product, engineering, marketing, and growth so you can focus on building the best calculators in endurance sports.

⚙

Admin Dashboard

Track user engagement, premium conversions, and calculator usage from a single command center built for your metrics.

★

Competitor Intelligence

Monitor TrainingPeaks, AI Endurance, Athletica, and others. Know what they ship before your users ask for it.

⚡

Growth Outreach

Identify and reach endurance coaches, running clubs, and triathlon communities who need better zone tools.

📊

Content Engine

Generate sport-science content in all 6 languages to drive organic traffic from athletes worldwide.

🎯

Conversion Optimization

Understand which calculators drive premium signups and which users are closest to converting.

🚀

Daily Progress

Every day, Polsia ships work. No standups, no sprints. Just consistent, autonomous execution.

Built For Endurance

Every sport. Every zone model. One platform.

From Karvonen heart rate zones to Coggan power models, from VMA-based running zones to Critical Swim Speed. TrainingZones.io covers every major zone framework in the science.

Running Cycling Swimming Triathlon Heart Rate Power Zones Pace Zones Critical Power VMA / MAS Race Prediction Nutrition

Train by the numbers.Race by feel.