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Danielle Lewis

Pro

IRONMAN 70.3® St George

10th May, 2025
USA
St George
2nd, FPRO
Triathlon, Middle distance - 113.1km
24°C
, Hot
4hrs 14mins
more race details

Danielle's headline numbers

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?
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~89
g
Carb per hour
Recommended 90g/h+
~838
ml
Fluid per hour
Recommended 500-1,000ml/h
~1,201
mg
Sodium per litre
Recommended 1100-1500mg/L
~4.7
mg
Caffeine per kg
Recommended 3-6mg/kg

Danielle'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
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T - 1-4hrs: Ate a carb rich meal (Low in fat & fibre)
pre-fueled
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T - 15mins: Took in a final dose of carb
Carb per hour
Recommended 90g/h+
~89
g
Danielle's Energy Rating
7
/10
"My energy felt pretty good! I worked hard on the bike but then when I got to the run nothing really felt great at all."
Our thoughts

Coming off a DNF due to a bike positioning issue in Texas a few weeks prior, Danielle was understandably nervous for St George. Her normal pre-race breakfast came back up as she suffered with nausea due to these nerves, but she still managed to get down a PF 30 Caffeine Gel in the final 20 minutes before the gun. Her energy levels on the bike were great, as she relied on her ‘super bottle’ containing 210g carb consisting of Carb Only Drink Mix and PH 1500 (Drink Mix) mixed into a 1 litre bottle. While this is a pretty strong mixture and may not be suitable for every athlete, Danielle has trialled and practised this in training for the past couple of seasons, and alternating sips with her 750ml hydration-only bottle of PH 1500 (Tablets) works well for her. Since she took a PF 30 Gel at the very end of the bike leg, she delayed her fueling until a bit later into the run this time. Her average carb intake went from ~114g/h on the bike to ~61g/h on the run, which likely contributed to the fatigue she felt on this last leg. It may be helpful to move the final bike gel earlier so she can start fueling earlier on the run next time around.

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.

Pre-loaded electrolytes
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T - 60mins: Drank ~500ml of strong electrolyte drink
Fluid per hour
Recommended 500-1,000ml/h
~838
ml
Sodium per litre
Recommended 1100-1500mg/L
~1,201
mg
Danielle's Hydration Rating
7
/10
"It was really hot and just a brutal day out there."
Our thoughts

Even though St George is usually a dry, moderate climate race, this year it saw higher temperatures and made for a tough day out on course. Danielle has been working hard on increasing her sodium relative to the fluid she takes on, and made significant improvement last season on this, with the winning strategy for her being to diligently add PH 1500 (Tablets) to her front bottle as she drinks and refills with water. Staying on top of her sodium and fluid intake was crucial in this hot race, especially since Danielle’s learned through sweat rate measurements that she’s a very heavy sweater in hot conditions. Her fluid intake dropped off significantly on the run (going from ~1.3L/h to ~396ml/h), but for the 70.3® distance, this ‘frontloading’ on the bike carried her through the run, supplemented by a handful of aid station water cups and salt capsules.

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.

Pre-caffeinated
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T - 0-4hrs: Had a final hit of caffeine
Caffeine per kg
Recommended 3-6mg/kg
~4.7
mg
Our thoughts

Danielle is used to using caffeine in her races, so it was a no brainer to include it in her strategy. After her morning coffee and pre-race PF 30 Caffeine Gel, she had an additional 200mg dose of caffeine once on the run. While her total intake was in line with the recommendations for harnessing the stimulant’s ergogenic benefits, it may be better to move or add a caffeine dose to when she’s on the bike in order to give it enough time to peak in her bloodstream (~45-60 minutes) and mask fatigue on the run.

How Danielle hit her numbers

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

Danielle's weapons of choice

Final thoughts

Danielle's Satisfaction Rating
8
/10
I did feel like I probably wanted maybe higher energy levels on the run, so I can work on increasing that as I continue.
Danielle
Danielle did an excellent job hitting all of her numbers in St George, and finishing 2nd in a tough field of competitors on a warm day. She’s had difficulties with her GI system and tolerance recently, so sticking to what she knows feels good, and having it work well even on a hot day and stacked field, is a huge win! We’d suggest just a couple of tweaks, such as adjusting the timing of her caffeine and incorporating an earlier gel on the run, for her next race.
PF&H

Danielle's full stats

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Overall
378g total carb
89g per hour
3,550ml total fluid
838ml per hour
4,265mg total sodium
1,007mg per hour
1,201mg
Sodium per litre
300mg total caffeine
4.7mg per kg
Bike and Run
Bike
Run

Data Confidence
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We rate each of our case studies from 1-5 based on the level of accuracy, and our confidence in the data.
1
2
3
4
5

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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