Select a protocol to preview it, then launch the guided timer with voice coaching and live heart rate.
Intensity Timeline
Scientific Basis
Soviet Periodization — Recommended 12-Week Stack
Weeks 1–2: Polarized 80/20 base only. Weeks 3–8: Norwegian 4×4 three times per week. Week 4 onward: Soviet Pyramid once weekly. Peak phase: replace one 4×4 with Tabata or MMA Circuit. Deload every fourth week at 50% volume. Never schedule consecutive high-intensity days.
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Guided Session
00:00
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bpm
Session Complete
Well Executed
Recovery: 10 min walk · cold exposure optional
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Protocol Builder
Protocol Builder
Build Your Own Protocol
Create, save and launch your own custom interval sessions.
Saved Protocols
New Protocol
Name your session, add your intervals, set rest periods.
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Performance Tools
Performance Tools
Train Smarter With Data
HRV readiness, VO₂max estimator, session tracker, and weekly schedule builder.
HRV Readiness Check
Enter today's HRV and your 7-day baseline to get your training recommendation.
VO₂Max Estimator
Cooper 12-minute test — run as far as possible. Enter distance in metres.
Estimated VO₂Max
ml · kg⁻¹ · min⁻¹
Weekly Session Tracker
Tap a day to mark it complete.
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Weekly Schedule Builder
Select your available training days for a personalised protocol plan.
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Nutrition
Nutrition Protocol
Precision Fueling For Adaptation
VO₂max is substrate-dependent. Nutrition is training.
NSCA · CSCSNSCA · CPSSPoliquin · L5PN · L220 Years
I have spent 20 years studying what actually makes the human body stronger, leaner and more resilient — not what sells, what works. I coach every client the same way: with full attention, real science, and no shortcuts.
"I went from not being able to run 5km without stopping to completing my first half marathon in under 4 months. The programming was unlike anything I had tried before."
Online Client · 34 · Romania
"Cosmin gave me more education about my own body in the first week than I got in 3 years of gym training. The HRV-based approach changed everything."