Form on event day: how tapering works
Fitness builds over weeks, fatigue fades in days. Tapering uses the difference: you lower load before the event, fatigue falls, fitness barely moves, and form rises.
The idea behind it
Form is fitness minus fatigue. Fitness (CTL) averages over about 42 days, fatigue (ATL) over about 7. If you train less in the last two weeks, ATL drops fast but CTL only slowly. The difference, i.e. form, grows. The aim is to be fresh on event day without losing noticeable fitness.
How much and how long
- Duration: the taper starts about 14 days before the event. For very short events (time trial, 5 km run) fewer days often suffice, for long events (marathon, long-distance triathlon) a slightly earlier start can make sense.
- Volume: load falls to about 60 % of a normal week, the event week itself to about 40 %.
- Intensity: stays. Short hard efforts keep the edge, only the amount goes down.
What form to aim for
As a rule of thumb, a form of about +5 to +25 on event day counts as fresh. How much suits you is individual. Try it before less important events and note at which form you felt best.
What a projection can do
From your plan you can calculate how fitness, fatigue and form develop if you complete the planned sessions. Days with no planned session count as zero load. That is a calculation from the plan, not a prediction of your performance: illness, sleep and daily readiness do not enter it. But it shows early whether your form on event day is likely to land in the target range, and lets you adjust the plan while there is still time.
A checklist for the last days
- Reduce load as planned, but do not stop completely.
- One or two short sessions at event intensity.
- Practise sleep, food and drink as on event day.
- Check your equipment so nothing new is tried at the start.
In ZonePit
If you enter an event, ZonePit starts the taper 14 days ahead and plans the event week with reduced load. The projection of fitness, fatigue and form from your plan shows what your form looks like on event day. The plan is generated by transparent rules, not by feel.
Join the betaKeep reading
Sources
- Hunter Allen, Andrew Coggan: Training and Racing with a Power Meter (tapering, form values).
- Iñigo Mujika, Sabino Padilla (2003): Scientific bases for precompetition tapering strategies, Medicine & Science in Sports & Exercise.
ZonePit is a training and wellness app, not a medical device.