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Myth-busting, evidence-based running guides across training science, marathon racing, recovery, and getting started — see what science really proves.

Interval Training Guide: Minutes in the Red Zone

Featured · Workouts & Sessions

Interval Training Guide: Minutes in the Red Zone

Intervals don't work because they hurt. They work because of minutes spent near VO₂max. The protocols, the dose, the hills, and what the trials show.

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Workouts & Sessions

How each kind of run works and how to run it: intervals, tempo, long runs, and the paces that govern them.

Metrics & Physiology

The numbers behind training and what they really mean: thresholds, DFA a1, ACWR, CTL/ATL/TSB, VO₂max, HR zones, running economy.

Marathon & Racing

Marathon-specific training, pacing, and the physiology of racing at every distance.

Recovery & Health

Sleep, HRV, nutrition — the unglamorous work that lets training adaptations stick.

Getting Started & Injury Prevention

Evidence-based guidance for new runners, and staying healthy while you build volume.

Product Updates

What's new at Runima: features, watch faces, and releases.