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Danielle Lewis

Pro

IRONMAN® Texas

22nd April, 2023
USA
Texas
5th, FPRO
Triathlon, Full distance - 226.2km
20°C
, Hot
8hrs 56mins
more race details

Danielle's headline numbers

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?
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~73
g
Carb per hour
Recommended 90g/h+
~950
ml
Fluid per hour
Recommended 500-1,000ml/h
~644
mg
Sodium per litre
Recommended 1100-1500mg/L
~3.9
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-loaded
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T - 1-4hrs: Ate a carb rich meal (Low in fat & fibre)
pre-fueled
?
T - 15mins: Took in a final dose of carb
Carb per hour
Recommended 90g/h+
~73
g
Danielle's Energy Rating
7
/10
"I’d break this down to a 10 during the swim, 8 on the bike and 5 on the run."
Our thoughts

Danielle tackled IRONMAN® Texas with two fuel bottles on the bike with her homemade energy drink mix plus several PF 30 Gels and one PF 30 Caffeine Gel. This allowed her average carb intake on the bike to show significant improvement from her IRONMAN® Arizona appearance where she averaged ~30g/h less. Danielle pre-mixed bottles for the run in an attempt to continue her fueling, but with the ‘sloshing’ she felt in her stomach, she only felt comfortable enough to finish one and a quarter of these bottles. Subsequently, her carb intake noticeably dropped from bike to run, which she felt the impact of as fatigue built up in her legs. Going forward, Danielle can work on tolerating a higher carb intake in warm conditions when fluid requirements are also high, and therefore minimising the drop off from bike to run in order to maintain energy levels and fuel her all the way to the finish.

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.

Danielle1310mg/L
Danielle 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.

Given Danielle’s losses are High (1,310mg/L), nailing her hydration strategy becomes especially crucial when it’s hot and/or humid.

Learn more
Pre-loaded electrolytes
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T - 60mins: Drank ~500ml of strong electrolyte drink
Fluid per hour
Recommended 500-1,000ml/h
~950
ml
Sodium per litre
Recommended 1100-1500mg/L
~644
mg
Danielle's Hydration Rating
7
/10
"The sloshing feeling in my stomach really affected me on the run."
Our thoughts

With temperatures north of 20 ºC (68 ºF) out on course, it was important for Danielle to replace her above average fluid and sodium losses. On the run, Danielle was frustrated to feel some nausea (largely due to the sloshing feeling), but grateful that it wasn’t to the same extent as last year. To avoid this in future, Danielle will aim to spread her fluid intake out more evenly with small, frequent sips. In practice, she could carry her PH 1500 with her rather than trying to finish the bottle during T2. Although her hydration strategy didn’t replace as much as it could have, it was still an 82% increase from last year. Danielle’s main electrolyte intake was in the form of gummies which contained ~50mg of sodium each. Despite taking eight of them, she still wasn’t matching her sweat sodium concentration. Using Electrolyte Capsules instead may be an easier way to get more sodium in to account for her high fluid needs and salty sweat. It’s likely that improving this concentration to better match her losses could help with the sloshing feeling as well.

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
~3.9
mg
Our thoughts

Danielle was on the lower end of the general performance recommendations for caffeine. Since the stimulant can help with focus and reducing perceived effort, we’d suggest trying to incorporate another PF 30 Caffeine Gel into her plan to provide an extra boost during the race.

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
6
/10
While I achieved my number one goal of securing a Kona slot, I feel I could've gone faster on the run.
Danielle
Despite still experiencing some stomach discomfort on the run, Danielle was extremely pleased to secure 5th place which qualified her for the IRONMAN® World Championships in Hawaii. We observed a large improvement in her electrolyte replenishment when compared to her strategy at the same race the year before which, alongside a more robust fueling strategy, may have contributed to the improved performance. Going forwards, Danielle still has some areas to work on, such as taking more electrolytes while running and training her gut to handle the higher fluid intakes required during hot races.
PF&H

Danielle's full stats

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Overall
653g total carb
73g per hour
8,485ml total fluid
950ml per hour
5,463mg total sodium
611mg per hour
644mg
Sodium per litre
247mg total caffeine
3.9mg 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 some confidence in the quantities and brands of products consumed but the data may lack specifics (e.g. volumes specific flavours). A high number of estimations have been made and the room for error is moderate-high. There may also be the possibility that some intake has been grossly over- or under-estimated.

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