The final 4 weeks before the race as a countdown plan: gut training from day 28, race-specific sharpeners, freezing your setup and arriving smart.
"What do I do in the final four weeks before the race?" The honest answer: you no longer build your form there — you only decide whether you can access it.
The countdown has a scientific anchor number: the gut needs around 28 days to adapt to high carbohydrate amounts via transporter upregulation — so your gut training starts exactly four weeks before the start.
The rest is discipline in the other direction: the intense sessions stay at 2–3 per week but become race-specific; the strength session every 10 days stays in the plan; the equipment gets tested instead of swapped. Competition preparation is not a training block. It is project management for the one day when everything has to click.
From day 28 you rehearse your race fueling in every hard session — same products, same amounts, same frequency as on race day, because the adaptation of the gut transporters takes about four weeks.
In parallel, match your training against the demand profile: XCO demands 37 percent of race time above the second threshold with effort spikes of 5–10 seconds. If your intervals are far from that, now is the last sensible moment for correction — not in race week.
The dose stays: 2–3 intense or intermittent sessions per week. What changes is the character. Instead of general intervals you now ride start simulations — because the opening lap eats 11 percent of your anaerobic reserve W′, later laps only 3–5 percent — and repeats on terrain resembling the key sections.
The strength session stays too: one session every 10 days conserves the winter gains. Adding volume now "to be safe" is confusing nervousness with a training stimulus.
Everything on your bike on race day has proven itself two weeks earlier. Fine-tuning yes — above all tyre pressure: pressure changes the bike's vibration response and belongs to terrain tuning, and larger tyre volume measurably reduces impact load.
But: no new tyre models, no fresh brake pads the night before, no untested components. Impacts and vibration increase muscle activity and accelerate fatigue — your setup is a performance factor, not a cosmetic topic. From the end of week 2: frozen.
Now you buy freshness — as a practice rule, conservatively put: cut volume clearly, keep intensity as short activation sharpeners, prioritise sleep. The race load itself is hard enough: average heart rate around 180 for 96 ± 7 minutes. A tired racer with perfect legs does not exist.
Place the last strength session at the start of the week, the last intense session with two or three short spikes about two days before the start — after that, every extra effort is a loan you repay on race day.
Recon the course and fix brake points, lines and your fueling windows — you eat in the rolling and descending sections, which make up around 27 percent of XCO time.
Take the weather forecast seriously: temperatures above 20 °C are significantly associated with more injuries, and 5–47 percent of riders report gastrointestinal symptoms after events — you defuse both with a heat plan and rehearsed fueling. Write race day down as a run sheet: wake-up, meals, warm-up, staging. What is on paper, your head no longer has to produce at 180 bpm.
The biggest danger in race preparation is overconfidence during course recon: ride key sections first with full concentration and strength in reserve, progress step by step, and skip passages above your safe limit — a crash in week 1 costs more than any saved second is worth.
In heat, plan cooling and fluid amounts in advance rather than improvising. And only start healthy: racing while run-down risks not placings but your season.
Ride a complete dress rehearsal under race conditions 10–14 days out: race breakfast at the real time, warm-up protocol, start simulation, race fueling to plan — ideally on similar terrain.
Everything that happens on race day should be a repetition, not a premiere. The dress rehearsal exposes the gaps while you can still close them.
Yes, with four weeks of lead time: around 28 days of increased carbohydrate intake raise absorption capacity via upregulation of the gut transporters. Rehearse the exact race intake in every hard session. The alternative is unpleasant: 5–47 percent of riders report gastrointestinal symptoms after events.
Yes, measurably: ambient temperatures above 20 °C are significantly associated with more injuries in MTB racing. With a warm forecast, plan more fluids, pre-cooling and a more controlled opening pace. Heat does not just make you slower — it makes you error-prone, and errors crash on rough terrain.
The one you tested and froze in week 2. The research: tyre pressure changes the bike's vibration response and is a tuning tool, larger volume reduces impacts — pressure had no independent performance effect in the tested range. So: tune for traction and puncture protection on the race terrain, not for watt myths.
Clearly less than usual: instead of the usual 2–3 intense sessions, race week keeps short activation sharpeners — as a practice rule, the last one about two days before the start. Volume drops clearly, snappiness stays. In race week you no longer chase form, you conserve it.