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Chris Knight

29029 Snowbasin #1

18th August, 2023
USA
Utah
Completed
Hiking - 48km
27°C
, Very Hot
30hrs 15mins
more race details

Chris' headline numbers

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?
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~37
g
Carb per hour
Recommended 30g/h
~437
ml
Fluid per hour
Recommended 250-750ml/h
~631
mg
Sodium per litre
Recommended 400-800mg/L
~1.6
mg
Caffeine per kg
Recommended 3-6mg/kg

Chris' 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
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T - 15mins: Took in a final dose of carb
Carb per hour
Recommended 30g/h
~37
g
Chris' Energy Rating
8
/10
"I had generally excellent energy levels throughout the event, but the hottest parts of the day were sapping and had a massive impact on my pace. Everything was easier in the cooler hours."
Our thoughts

The 29029 Snowbasin #1 challenge involved hiking up a mountain thirteen times to reach the equivalent height of Mount Everest (i.e. 29029 feet), so Chris tried to largely rely on sports nutrition products to fulfill his fueling requirements during hikes. By consuming PF 30 Gels and PF 30 Chews during each 1.5 to 2 hour hike, Chris took more fuel on board (~45-60g/h) when he was moving at a higher intensity to keep his energy levels up. Between hikes, Chris took advantage of the real foods on offer at lunch, dinner and breakfast to consume the other macronutrients of fats and protein, which can be crucial during an event that involves such an extreme duration, whilst he was also careful to control his portion sizes so he didn’t overload his gut.

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.

Chris696mg/L
Chris 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.

Whilst Chris’s losses are on the low side, getting his hydration strategy right is still crucial when it’s hot and/or humid as his higher sweat rate in these conditions can result in significant net losses over the duration of a race.

Learn more
Pre-loaded electrolytes
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T - 60mins: Drank ~500ml of strong electrolyte drink
Fluid per hour
Recommended 250-750ml/h
~437
ml
Sodium per litre
Recommended 400-800mg/L
~631
mg
Chris' Hydration Rating
9
/10
"I potentially overdid my fluid intake during the period when it got really hot. I felt like I was sweating buckets and was wary of becoming dehydrated. In hindsight, my relative intensity (i.e. walking pace) was quite low, so perhaps I could’ve eased back slightly at this time."
Our thoughts

Chris effectively used two 500ml soft flasks throughout the event which he filled up ahead of each hike, one with plain water and the other with PH 1000 Electrolytes. This allowed Chris, who’s classified as a ‘low’ salt sweater, to replace a good proportion of his sweat sodium losses. Chris’ fluid intake seemed adequate for this event, but he increased his intake during the hottest parts of the day (highs of 36°C/97°F!) to 1L/32oz per hour, which he thinks in hindsight may have been too much. In future, collecting more specific sweat rate data to give him an idea of the volume of sweat he loses in a variety of environments and intensities would be helpful. Overall Chris did well to listen to his body, change his approach during the hotter hours, and avoid any major hydration-related issues.

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
~1.6
mg
Our thoughts

Chris could have considered using slightly more caffeine during the waking hours of the event to reach the recommended caffeine guidelines in an attempt to help increase his perceived energy levels. This said, Chris told us that he was conscious of getting some good quality sleep (which he achieved!) and was worried that caffeine would have a negative impact on this.

How Chris hit his numbers

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

Chris' weapons of choice

Final thoughts

Chris' Satisfaction Rating
10
/10
I’m really pleased with how I executed my race nutrition, hydration and pacing strategy on the day. My lack of experience of really hot conditions was the biggest challenge, and so might be worth doing some sweat rate testing in future to get a better understanding of my fluid requirements in similar conditions.
Chris
Chris implemented an effective strategy and adjusted to fluctuating weather conditions at 29209 Snowbasin, where the brutally hot temperatures on the first day contributed to a relatively low finishers’ rate of 59%.
PF&H

Chris' full stats

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Overall
1129g total carb
37g per hour
13,226ml total fluid
437ml per hour
8,349mg total sodium
276mg per hour
631mg
Sodium per litre
140mg total caffeine
1.6mg per kg

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.

Chris' recent case studies

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