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Oliver Hobson

La Rochelle Marathon

28th November, 2021
France
La Rochelle
Top 50
Running, Marathon - 42.2km
9°C
, Cold
2hrs 45mins
more race details

Oliver's headline numbers

?
?
?
~43
g
Carb per hour
Recommended 75g/h
~290
ml
Fluid per hour
Recommended 100-500ml/h
0
mg
Sodium per litre
Recommended 1300-1700mg/L
0
mg
Total caffeine

Oliver'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)
Didn't pre-fuel
?
Oliver would benefit from taking in a final dose of carb <30 minutes before
Carb per hour
Recommended 75g/h
~43
g
Oliver's Energy Rating
7
/10
"My energy was great during the race. From 32-38km I had a rough spot but didn't hit any wall"
Our thoughts

Prior to starting the race, Oliver ate a high-carb breakfast to increase his glycogen stores and top up his energy levels. He could have benefited from taking an additional ~30g dose of carb, such as a Gel or Chew, in the last 30 minutes as a final boost to spare glycogen stores for later in the race. Considering his efforts to carb-load, Oliver’s lower than recommended intake during the race may have been just enough to maintain his energy levels across this race and see him to the finish line. However, the science suggests that intakes higher (~60-90 grams of carbohydrates per hour) would be more suitable given the intensity and duration of the race. Fortunately, Oliver didn’t experience any GI issues during the race thanks to regularly practicing his fueling strategy and training his gut. This comfort level bodes well for Oliver increasing his intake in future races to further enhance his energy levels and 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.

Oliver1556mg/L
Oliver has been Sweat Tested to dial in his 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 Oliver’s losses are Very High (1,556mg/L), nailing his hydration strategy remains important, even when it’s Cold.

Learn more
Pre-loaded electrolytes
?
T - 60mins: Drank ~500ml of strong electrolyte drink
Fluid per hour
Recommended 100-500ml/h
~290
ml
Sodium per litre
Recommended 1300-1700mg/L
0
mg
Oliver's Hydration Rating
8
/10
"It was a bit cold during the race so I didn't sweat that much, therefore I didn't feel like I needed too much"
Our thoughts

Without performing any targeted sweat rate testing it's tricky to pinpoint Oliver’s exact sweat losses for a race of this duration and intensity. Given the mild, wet conditions he was racing in, it’s likely his sweat rate and subsequent sweat losses were lower than average for him. Oliver attempted to increase his sodium intake prior to the race by consuming a bottle of PH 500 on the morning of, but he’d be better off swapping the PH 500 (Tablet) to a PH 1500 (Tablet). By drinking a stronger electrolyte drink, he will successfully pre-load, maximizing his blood volume and optimizing his pre-race hydration status. During the race itself, Oliver didn’t consume any sodium and luckily avoided any cramping episodes. In his future training and racing, he could get a Sweat Test to see how salty his sweat is and perform sweat rate testing to quantify his total fluid losses. As an estimate, he could start by carrying a Soft Flask with some PH 1000 to gradually replace his losses and see if this helps him avoid cramping or other dehydration-related symptoms.

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
?
T - 0-4hrs: Had a final hit of caffeine
Total caffeine
0
mg
Our thoughts

Oliver didn’t consume any caffeine during the race, but did drink a coffee with his breakfast. Despite not meeting the recommended scientific guidelines of the stimulant based on body weight, he would have benefited slightly from the morning caffeine dose. Still, to further enhance his perceived energy levels and reap the ergogenic benefits of the stimulant he should look to include some in his race strategy. He could do this by having a caffeinated gel which we would recommend he trials during some training runs ahead of his future races.

How Oliver hit his numbers

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

Oliver's weapons of choice

Final thoughts

Oliver's Satisfaction Rating
8
/10
I am new to marathon running so I am very pleased with my performance. I did better than I thought I would but now I realise that I can do even better!
Oliver
Oliver raced well in his first marathon using a simple hydration and fueling plan. Increasing his carb intake with a few more PF 30 Gels throughout the race could enhance his performance and prevent any dips in energy, and incorporating sodium and caffeine whilst on the move will even further refine his strategy.
PF&H

Oliver's full stats

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?
?
Overall
120g total carb
43g per hour
800ml total fluid
290ml per hour
0mg total sodium
0mg per hour
0mg
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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