30 or 45 minutes, set by the engine

You don’t choose the length. The engine does.

Workouts start at 30 minutes. Two matching answers — “I could have kept going” or “I couldn’t wait to finish” — over the last three workouts move you to 45 minutes or back to 30. Every length includes setup, transitions, both sides, work and rest.

Editorial owner: Yann Lephay.

Updated: 4 September 2026.