Tren: run the Norwegian method

Preben Hafnor

About this app

Tren builds your running around the Norwegian method — the double-threshold approach that has reshaped how many elite distance runners train. It turns your training data into a plan that pushes your fitness while you manage your training load.

WHY THE NORWEGIAN METHOD
Do more of your quality work at a controlled "sub-threshold" effort — fast, but never all-out — often twice in a day (the "double threshold"). You bank far more high-quality training than hard-easy plans allow, without the burnout that comes from redlining. The approach was pioneered by Norwegian 5000m runner Marius Bakken.

Tren makes it practical: it reads your training, sets your threshold paces from your own data, and lays out each week — including when to double — so you train in the zone, not over it.

WHAT YOU GET
• Plans built on the Norwegian double-threshold method, structured around your real fitness and schedule
• Build mileage safely — volume rises only as fast as your body can adapt
• Lactate tracking — log your own lactate measurements to dial in your threshold zones
• Training-load monitoring (ACWR) — separate cardio and musculoskeletal load with clear green / amber / red zones
• Fitness tracking (VDOT) — your level from real performances, with personal pace zones for easy, threshold, interval and repetition runs
• Auto-sync from your running watch — every run analyzed automatically
• Activity breakdowns — splits, per-rep analysis and effort
• A daily readiness check — one clear signal: push today, or pull back

WHO IT'S FOR
Runners training for 5K to marathon who want to train smart and stay consistent.

Tren gives training guidance, not medical advice.

QUESTIONS OR FEEDBACK
Email us or visit https://tren.run/support — we read every message.

Tren connects to your training platform with your permission and uses your training data to power its analysis. Privacy policy: https://tren.run/privacy

What’s new

Weekly view shows your planned km against what the plan calls for.
Every planner day now explains why it's rest, easy or quality.
"How to run it" guidance for every session type.
Warm-up and cool-down learn from your history.
Grade-adjusted pace on your run screen and charts.
Road or trail shown on every run.
Faster loading on your run screens.
Thanks for running with us.