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Trina Dawkins

Country to Capital

6th January, 2024
England
London
Top 50, F40-44
Running, Ultra - 70km
5°C
, Cold
10hrs 38mins
more race details

Trina's headline numbers

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?
?
~21
g
Carb per hour
Recommended 75g/h
~282
ml
Fluid per hour
Recommended 250-750ml/h
~576
mg
Sodium per litre
Recommended 1100-1500mg/L
0
mg
Total caffeine

Trina'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.

No Carb-rich meal
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A carb rich meal (low in fat & fibre) ~1-4 hours before would help Trina start optimally fueled
Didn't pre-fuel
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Trina would benefit from taking in a final dose of carb <30 minutes before
Carb per hour
Recommended 75g/h
~21
g
Trina's Energy Rating
8
/10
"I just had some fatigue but in general my energy was fine as I had no major dips. I even had enough energy for a sprint finish!"
Our thoughts

Trina started the race with PF Carb & Electrolyte Drink Mix in two flasks, but then relied mostly on ‘real’ food sources to fuel her throughout. Her snacks of choice included high carb ones, with some fat sources mixed in to prevent flavour fatigue. While higher fat intake during exercise can contribute to GI distress, Trina gave a 10/10 for GI comfort levels. She fueled in small doses (likely contributing to her stomach’s comfort), but her overall carb intake was significantly lower than what we’d recommend. Trina has ample room to increase her intake, such as by adding a PF 30 Gel every 45-60 minutes, to help optimise her performance.

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
?
T - 60mins: Drank ~500ml of strong electrolyte drink
Fluid per hour
Recommended 250-750ml/h
~282
ml
Sodium per litre
Recommended 1100-1500mg/L
~576
mg
Trina's Hydration Rating
7
/10
"I had some twinges of cramp in my left quad and calves but no severe cramps. I always think I could drink more but I don’t want to have to go to the toilet too much."
Our thoughts

Refilling each of her two soft flasks twice enabled Trina to consume an adequate amount of fluid to replenish her high sweat losses. As a subjectively salty sweater with a high sweat rate, she used to struggle with significant cramps during ultras, but by working on increasing her sodium intake she has reduced her cramping bouts. Trina did begin to experience mild twinges this time around in her quads and took electrolyte capsules when she noticed them to fend them off. Even though the weather was on the colder side, Trina could have increased her sodium concentration, particularly since she’s struggled with cramps historically and has the classic salty sweater signs. In warmer conditions, she would definitely need to increase her relative sodium concentration to account for her total losses and proactively address any negative performance impacts from the heat.

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
0
mg
Our thoughts

Trina didn’t use any caffeine the morning of or during the race. As caffeine tolerance varies greatly between individuals, depending on her usual day-to-day caffeine intake, she may look to implement and benefit from a moderate dose during races, for example in an attempt to prevent the fatigue she felt kicking in towards the end of the race.

How Trina hit her numbers

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

Trina's weapons of choice

Final thoughts

Trina's Satisfaction Rating
9
/10
I think I had a really good race and still had loads of energy at the end. My satisfaction with the race is very high and PF&H has made all the difference.
Trina
Incorporating a variety of fuel sources worked well for Trina, as her energy levels were great throughout and she shared that she recovered smoothly over the weekend. Going forward though, increasing her carb intake before and during could lead to even further improved endurance performance, such as through gels or chews so her fuel isn’t tied to her fluid intake. We’d also recommend doing some sweat rate testing to quantify the fluid she’d need in warmer conditions, and then apply a higher sodium concentration to match her high losses and prevent any cramp symptoms.
PF&H

Trina's full stats

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?
?
Overall
222g total carb
21g per hour
3,000ml total fluid
282ml per hour
1,727mg total sodium
162mg per hour
576mg
Sodium per litre

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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