You've done the training. The intervals, the long rides, the early mornings. And then you blow up at 60km because you ate the wrong breakfast or forgot to fuel in the first hour. It's the most preventable failure in cycling — and it happens to experienced riders every single weekend.
Race day nutrition isn't complicated, but it does require a plan. The riders who consistently perform well on race day are the ones who treat nutrition with the same seriousness as their training. Here's the complete timeline.
48 Hours Before: Carb Loading Done Right
Carb loading is real science, but most people do it wrong. The goal is to maximise glycogen stores in your muscles and liver before the race. A fully loaded system holds roughly 500-600g of glycogen — enough for about 90 minutes of hard racing. Everything after that depends on what you eat during the race.
What to do: Increase carbohydrate intake to 8-10g per kg of body weight per day for the 48 hours before the race. For a 75kg rider, that's 600-750g of carbs per day.
What that looks like: Rice, pasta, bread, oats, potatoes, fruit, energy drinks. Familiar foods that you know your stomach handles well. This is not the time to experiment with that new Thai restaurant.
What not to do: Don't stuff yourself in a single meal the night before. Spread the carbs across the full 48 hours. A massive pasta dinner the night before is a recipe for poor sleep and a bloated gut on the start line.
Reduce fibre intake slightly in the last 24 hours. You don't want a high-residue breakfast causing stomach issues during the race.
Race Morning: 3-4 Hours Before the Start
The race morning meal is about topping up liver glycogen (which depletes overnight) without causing GI distress. The window is 3-4 hours before the start — any closer and you risk stomach problems during the effort.
Target: 1-2g carbs per kg body weight. For a 75kg rider, that's 75-150g of carbs.
Good options:
- Porridge with honey and banana (classic for a reason)
- White toast with jam and a banana
- Rice cakes with peanut butter and honey
- A commercial pre-race product if you've tested it in training
Avoid: High fat, high protein, high fibre. Eggs and bacon are for the post-race meal. A full English is not pre-race nutrition.
Caffeine: 3-6mg per kg body weight, 60 minutes before the start. For a 75kg rider, that's roughly 225-450mg — a strong coffee or two. Caffeine is one of the most consistently proven ergogenic aids in exercise science. Use it.
30 Minutes Before the Start
A final top-up: one gel or a small energy bar. 20-30g of easily digestible carbs. Sip an energy drink. Don't try anything new. This is just putting the last drops in the tank.
Some riders have a small caffeine gel here instead of (or in addition to) their morning coffee. Personal preference — test it in training.
During the Race: The Critical Window
This is where most amateur cyclists fail. The excitement of the start, the pace of the bunch, the focus on positioning — eating drops off the priority list. By the time you remember, you're already in a glycogen hole.
The rule: start fuelling within the first 20 minutes. Not when you feel hungry. Not when you start to flag. From the gun.
Fuelling targets by race duration:
| Race Duration | Carbs Per Hour | Strategy | |---|---|---| | Under 60min | 30-60g | One gel at 20min, one at 40min | | 60-90min | 60-80g | Gel every 20 minutes + energy drink | | 90min-3hr | 80-100g | Gels + bars + energy drink, rotating every 15-20min | | 3hr+ | 90-120g | Full fuelling plan with mixed sources |
Use glucose-fructose products to maximise absorption — our energy gels guide covers how to choose the right ones. Your gut can handle about 60g of glucose per hour through one transporter. Adding fructose opens a second pathway, pushing total absorption to 90-120g per hour.
Practical tips:
- Open gels before the race and stash them in easy-to-reach pockets
- Set a timer on your bike computer to remind you to eat every 20 minutes
- Practise eating at race pace in training — it's harder than you think in a group
- Have a plan for where in the race you'll eat (smooth sections, after a climb, in the bunch)
Hydration During the Race
500-750ml per hour depending on temperature. In hot conditions, push toward 1 litre per hour with added sodium.
The key mistake: drinking only water. On efforts over 60 minutes, you need sodium to maintain blood plasma volume and prevent hyponatraemia. Use electrolyte tablets or an electrolyte-rich energy drink.
If the race has feed zones, know what's available and carry what you need to bridge the gaps.
Post-Race: The Recovery Window
The 30-60 minutes after crossing the finish line are when your body is most receptive to glycogen replenishment and muscle repair.
Immediate (within 30 minutes):
- 1-1.2g carbs per kg body weight (75-90g for a 75kg rider)
- 20-30g protein
- Fluid to replace sweat losses
A recovery shake or chocolate milk hits all three targets. This isn't about gourmet nutrition — it's about getting the right macros in quickly while your muscles are primed to absorb them.
Within 2 hours: A proper meal with carbohydrates, protein, and some fat. This is when the full English becomes appropriate. Rice and chicken. Pasta with a protein source. Whatever you enjoy that hits the macros.
That evening: Continue eating carbohydrate-rich meals, especially if you have another race or hard session within 48 hours. Glycogen resynthesis takes 24-48 hours to complete.
The Number One Mistake
The most common race day nutrition failure is not practising in training. Every single element of your race nutrition — the breakfast, the gels, the energy drink, the timing — should be rehearsed in training first.
Your gut responds differently under race intensity. Blood flow diverts from the digestive system to working muscles. Products that work fine on a steady training ride can cause cramping, nausea, or worse in a race. Test everything. Change nothing on race day.
Key Takeaways
- Start carb loading 48 hours out: 8-10g carbs per kg per day from familiar foods
- Race morning breakfast 3-4 hours before: 1-2g carbs per kg, low fat and fibre
- Caffeine 60 minutes before the start: 3-6mg per kg body weight
- Start eating within 20 minutes of the race start — don't wait until you're hungry
- Target 80-120g carbs per hour depending on race duration
- Use glucose-fructose products to maximise absorption above 60g per hour
- Recover within 30 minutes: carbs + protein + fluid
- Test everything in training — change nothing on race day
- For daily nutrition around training, see the fuel for the work required framework
- Use our In-Ride Fuelling Calculator to set your carb targets
- Hydration is equally critical — 500-750ml per hour with electrolytes
- Pair race day nutrition with a proper taper for maximum performance
