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Mathias Peterson

Pro

IRONMAN® Frankfurt

18th August, 2024
Germany
Frankfurt
Top 50, MPRO
Triathlon, Full distance - 226.2km
20°C
, Hot and Humid
7hrs 53mins
more race details

Mathias' headline numbers

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?
?
~69
g
Carb per hour
Recommended 90g/h+
~471
ml
Fluid per hour
Recommended 500-1,000ml/h
~820
mg
Sodium per litre
Recommended 800-1200mg/L
~4.1
mg
Caffeine per kg
Recommended 3-6mg/kg

Mathias' 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
?
T - 15mins: Took in a final dose of carb
Carb per hour
Recommended 90g/h+
~69
g
Mathias' Energy Rating
5
/10
"It is hard to tell with the crash. The first 32k on the run felt great and then I faded on the last lap. I had pretty low energy but also felt mentally drained. I lost about 70% of my carbs with my aero bottles. From thinking I was going to DNF to be safe for Hawaii, to giving it a go and then running a good 30k, it was a bit of a rollercoaster. "
Our thoughts

Mathias had a tough day out at IRONMAN® Frankfurt after a bike crash disrupted his race. This caused him to lose a bottle that contained a significant amount of PF 300 Flow Gel, so his energy levels on the bike began to plummet. He picked up some energy gels from the on-course aid stations in an attempt to replenish the lost fuel, but still struggled to hit his goal intake of 90 g/h. From his previous case studies, we know that Mathias is comfortable tolerating a higher carb intake of around 90g/h, so it’d be helpful to have a secondary source of carbs in case of future bottle losses to ensure he can still support his energy needs.

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.

Didn't pre-load electrolytes
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Drinking a strong electrolyte drink before the race could have helped Mathias start optimally hydrated
Fluid per hour
Recommended 500-1,000ml/h
~471
ml
Sodium per litre
Recommended 800-1200mg/L
~820
mg
Mathias' Hydration Rating
5
/10
"I had to pee a couple of times on the bike and it got so bad that I had a hard time focusing on the race. I did feel hydrated but I am aware I didn’t drink that much."
Our thoughts

Although Mathias drank some electrolytes ahead of the race, pre-loading with PH 1500, instead of with the lower concentration of PH 1000, could help him retain more water and prevent the need to urinate frequently. Despite this need to pee a few times on the bike, Mathias’ fluid intake was slightly lower than the recommendations for a race of this duration and intensity. It’s likely this was due to the high volume of his pre-race drinks and the increased nervous energy he experienced.

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
~4.1
mg
Our thoughts

Mathias started his race morning with a couple of coffees and a couple of energy drinks to get the stimulant into his bloodstream, and then strategically consumed a few PF 30 Caffeine Gels whilst on the run. By delaying his consumption of caffeine until later on in the race, he ensured he reaped the ergogenic benefits of the stimulant where he knew he’d need it most. This helped to reduce his fatigue slightly and boost his mental energy, contributing to the strong finish he was able to pull off.

How Mathias hit his numbers

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

Mathias' weapons of choice

Final thoughts

Mathias' Satisfaction Rating
2
/10
I learnt some things and it is always good to finish an IRONMAN®. But I can’t really use a 24th place for anything so it isn’t my finest work.
Mathias
Considering the wet conditions at the start of the bike and his subsequent crash, Mathias did a great job of pushing through these challenges to avoid a DNF, securing another IRONMAN® under his belt. Moving forward, adjusting the relative sodium concentration of his pre-race drinks, and having a back-up plan in case he loses some nutrition will hopefully help support his performance if adversity does strike again.
PF&H

Mathias' full stats

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Overall
544g total carb
69g per hour
3,720ml total fluid
471ml per hour
3,051mg total sodium
387mg per hour
820mg
Sodium per litre
323mg total caffeine
4.1mg 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.

Mathias' recent case studies

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