Stirnu Buks and LVM MTB: a practical race-day fuel plan

A practical MTB and trail-race plan: pre-start food, carbohydrate and fluid timing, safe handling on technical terrain, and a training test.

MTB riders racing through forest at an LVM event
MTB racing in the forests near Sigulda. Photo: AS Latvijas valsts meži (LVM). Avots / source

An MTB or trail-race fuel plan must work when heart rate is high, hands are busy and the surface is uneven. The goal is not the largest possible product list, but a simple rhythm tested in a similar training session.

Use this as a practical starting point, not individual medical advice. Adjust it to duration, intensity, weather and gastrointestinal tolerance.

Key points

Eat a familiar carbohydrate-rich meal two to three hours before the start.
Count carbohydrate from drink, gels and bars together.
Open and eat food only on a safe, controlled section of the course.

Before the start: predictable beats novel

Use familiar food the evening before and on race morning. A normal carbohydrate-rich meal with moderate fat and fibre two to three hours before the start works for many athletes. If nerves make eating difficult, a smaller familiar meal and drink may be easier.

Do not test caffeine on race day. Count coffee, cola and every sports product, and weigh a late-start benefit against sleep disruption.

During the race: count the total

For longer efforts, divide carbohydrate into small regular servings. A practical starting range for many athletes is 30–60 g per hour, but the individual target needs training. Drink, gel and bar are not separate bonuses: add their carbohydrate together.

Cycling experiments show that both solid and liquid carbohydrate sources can support carbohydrate availability, but no single trial guarantees a personal result. Eat a bar on a calm section; a prepared gel or drink may be easier near hard climbs.

Mountain bikers on the LVM MTB race course
Mountain bikers at an LVM event. Photo: AS Latvijas valsts meži (LVM). Avots / source

Fluid and safety

Plan from weather, aid access and your own sweat response. The goal is not to drink as much as possible. Excess intake can be dangerous; in the Boston Marathon study, gaining weight during the race was associated with hyponatraemia.

Confusion, repeated vomiting, severe headache, loss of coordination or inability to keep fluid down are not a routine “energy dip”. Stop safely and seek medical help.

A simple training test

Use a similar-duration session and log the pre-start meal, timing and carbohydrate of every item, fluid and symptoms. Change one variable next time. Pack food in use order and label the planned hour.

On race morning, confirm that wrappers work with gloves and that bottles can be reached without losing control.

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Frequently asked questions

Is a gel compulsory before an MTB start?

No. A suitable meal and a short race may not require one. Duration, intensity and a tested plan matter.

Can I eat a bar on a technical course?

Yes, but use a flat, controlled section. Keep both hands on the bars through technical descents.

How much should I drink?

Use your sweat response, weather and aid access. Do not force more fluid than you can safely tolerate.

Continue reading

Sources and image credits

  1. LVM: Latvia’s State Forests mountain-bike race in Sigulda
  2. Rauch et al. (1993), solid and liquid carbohydrate during cycling
  3. Triplett et al. (2012), carbohydrate gel and cycling trial
  4. Almond et al. (2005), hyponatraemia in Boston Marathon runners
Author: INTERVALS editorial team. Reviewed and localised for Baltic race conditions. Scientific claims were checked against the cited studies. Last reviewed: 21 August 2026.
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