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Eliza Wunsch

L'Etape du Tour Femmes

2nd August, 2025FranceSt François LongchampTop 50, F30-34

Eliza's headline numbers

~82g
Carb per hour
Recommended 75g/h
~291ml
Fluid per hour
Recommended 250-750ml/h
~546mg
Sodium per litre
Recommended 300-700mg/L
0mg
Total caffeine

Eliza's strategy

Fueling

Carbohydrate is the main fuel you burn when racing. Failing to fuel properly is a leading cause of underperformance in longer races.
Carb-rich meal

T - 1-4hrs: Ate a carb rich meal (Low in fat & fibre)

Didn't pre-fuel

Eliza would benefit from taking in a final dose of carb <30 minutes before

Carb per hour
Recommended 75g/h
~82g
Eliza's Energy Rating7/10

"I was confident in my fueling strategy, as I’d trained with it extensively. I didn’t experience any GI issues but I will continue to train my gut so next time I can make the most of the cheese and baguettes on course!"

Our thoughts

Eliza had a clear plan going into this race in order to tailor her fueling to the demands of the different sections. During the flatter first half, she relied on a PF 60 Chew Bar each hour for fuel which she enjoyed and tolerated well. When the climb of the Col de la Madeleine started, she began using PF 300 Flow Gel in a flow-flask kept in her jersey pocket, meaning she could focus on the sustained effort of the climb without having to open a gel or chewing solid foods. Throughout the event, Eliza supplemented her carb intake with two 750ml bottles containing two scoops of PF Carb Only Drink Mix and two scoops of PF Carb & Electrolyte Drink Mix each, as well as some classic French food from aid stations. This gave her an overall average of ~82g/h, which allowed her to push hard up the final climb while still enjoying the ride and avoiding flavour fatigue. Going forward, Eliza will continue to train her gut to tolerate more carbs so she can fully enjoy the French aid station experience.

Hydration

Taking on board an appropriate amount of fluid and sodium is essential to maintaining blood volume and supporting the cardiovascular effort needed to perform on race day.

Whilst the absolute amount of sodium and fluid consumed per hour is important, it’s critical to consider these in relation to each other. This is known as 'relative sodium concentration' and it’s expressed in milligrams per litre (mg/L). How much sodium you’re taking in per litre of fluid is more important than the absolute amount taken in per hour.

Eliza532mg/L

Eliza has been Sweat Tested to dial in her hydration plan

Sweat sodium concentration (mg/L) is largely genetically determined and remains relatively stable. Knowing how salty your sweat is enables you to replace a good proportion of your sweat losses, which can range from 200-2,000mg/L.

Whilst Eliza's losses are on the low side, getting her hydration strategy right is still important if she wants to perform at her best.

Learn more
Didn't pre-load electrolytes

Drinking a strong electrolyte drink before the race could have helped Eliza start optimally hydrated

Fluid per hour
Recommended 250-750ml/h
~291ml
Sodium per litre
Recommended 300-700mg/L
~546mg
Eliza's Hydration Rating7/10

"It was a cold and wet day, so I didn’t place a huge focus on my hydration, but did try to consciously drink even when I needed to pee."

Our thoughts

With the cold conditions, Eliza’s sweat rate will have been low, meaning that her intake of ~291ml/h likely replaced a sufficient proportion of her sweat losses. She found it hard to drink for the first 25km because she needed to pee; to prevent this from reoccurring, Eliza should preload with PH 1500 in the morning (instead of drinking just plain water) to increase fluid retention. Eliza doesn’t lose a lot of sodium through her sweat, so she was able to effectively replace it using PF Carb & Electrolyte Drink Mix. She almost perfectly matched her sodium intake to her sweat sodium losses and nailed the relative sodium concentration of her drinks to support the maintenance of blood plasma volume and reduce the risk of cramps.

Caffeine

Beyond the Three Levers of Performance (carb, sodium and fluid), caffeine is one of only a few substances that is proven to improve performance for most endurance athletes as it can help stave off mental and physical fatigue.

Didn't pre-load caffeine

Consuming caffeine in the hours before the start may have increased perceived energy levels

Total caffeine
0mg
Our thoughts

Eliza didn’t include caffeine in her race plan as she didn’t want it to amplify her nerves or sit badly in her stomach. While caffeine can provide ergogenic benefits to performance, it should only be used if it can be well tolerated and has been practised with, so Eliza made the right call for her individual needs.

How Eliza hit her numbers

Here's everything that Eliza ate and drank on the day...

Before race (>30 mins)
  • 500ml x Plain water
  • 1 x Earl grey tea
  • 2 x Apple and blueberry porridge sachet with milk
During

Final thoughts

Eliza's Satisfaction Rating9/10

I had such a great day out despite the rain and cold. I didn't aim to cycle the event competitively, I just wanted to enjoy the experience. So I was happy to be able to actually do both, partly due to my fuel and hydration.

Eliza

Eliza’s fuel and hydration strategy supported her in conquering L’Etape with a smile on her face. She used different carb sources to deliver a well-rounded fuel strategy, enabling her to focus on riding and be able to adapt to the demands of the course, while her hydration strategy successfully prevented symptoms of dehydration.

PF&H

Eliza's full stats

Overall
565g total carb82g per hour
2,000ml total fluid291ml per hour
1,092mg total sodium159mg per hour
546mgSodium per litre
0mg total caffeine0.0mg per kg

Data Confidence

We rate each of our case studies from 1-5 based on the level of accuracy, and our confidence in the data.

12345

There is an adequate level of accuracy in the data collected and the numbers reported. The athlete manages to recall what they ate and drank including most specifics (brands flavours quantities plausible estimations of volumes). However there are estimations made within the data which affect the overall confidence level in the data reported.

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