Reference Library

Archive

Long-form references the planner is built on. Each entry documents the scientific and coaching foundation behind a feature — who developed it, why it works, and how we’ve implemented it.

Athletes & CoachesDev & Science

Volume Progression

How TREN ramps your weekly km from where you are today, all the way up to 180 km/wk. Three regimes — linear, J-H-R cycle, continuous EWMA — chosen automatically by chronic volume. Calibrated against 10 published plans (Pfitzinger, Higdon, Hansons) and 9 elite case studies (Kipchoge, Ingebrigtsen, Bakken).

Your personalised view →Safety-net simulator →Plan benchmarks →Elite case studies →

Updated 2026-05-21

Athletes & CoachesDev & Science

Bakken Phases

Norwegian-model periodization from career arc to a single session. Four concepts: seasonal year structure, the 100-Day Marathon Plan, microcycle blocks, and career maturity.

For athletes & coaches →Implementation notes →

Updated 2026-05-15