Turn a percentage into a bounded plan
The 2023 taper meta-analysis reported time-trial improvements and examined duration, volume, intensity and frequency. Its suggested 41–60% volume reduction describes a research synthesis; it does not establish the exact best taper for every event or athlete.
For arithmetic only, reducing a 50 km training week by 40% leaves 30 km. Decide consistently whether race distance is included when comparing weeks. Retaining intensity means a small amount of familiar faster work, not retaining the full demanding session.
Use the taper checklist to connect the training reduction with travel, sleep, equipment and race logistics.