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Allan Hovda's scorecard

Bislett Ultra Challenge 50km

Saturday 11th February, 2023

Within recommended ranges

Just outside recommended ranges

Significantly outside recommended ranges

  • 49g

    Carb per hour
  • 628mg

    Sodium per hour
  • 330ml

    Fluid per hour
  • 1,905mg/L

    Relative sodium concentration
  • 304mg

    Total caffeine
  • How Allan hit those numbers

    500ml x PH 1500
    120g x Oats
    25g x Raisins
    66g x Banana (Peeled)
    600ml x Soy Milk
    1 x PF 30 Gel
    8 x PH Electrolyte Capsule
    4 x PF 30 Gel
    1L x Plain water
    50ml x Cola
    1.5 x Caffeine tablet (200mg caffeine)

    How Allan's hydration and fueling went...

      • As a well accomplished ultra endurance athlete, having previously won the Norseman triathlon three times and won the Bislett 24 Hour Indoor Challenge over a distance of 264.9km, Allan took part in this ‘shorter’ 50km ultra
      • Overall, he was satisfied that he largely executed his fueling and hydration strategy effectively, particularly as he was able to adapt on the fly on his way to a 3:11:22 time and 5th place


      • Allan made sure to start the 50km race optimally hydrated by preloading with PH 1500, but also restricted his other fluid intake (i.e. no morning coffee) so he could prevent needing to pee during the race. This plan paid off as he didn’t feel the need to stop once during the run
      • Interestingly, the temperature inside the stadium was 16ºc / 61ºF with a humidity of ~30%. The indoor event meant there was no headwind providing a cooling effect, and so Allan’s core temperature measurements and sweat losses (~3.5L/64oz total) are reflective of a much hotter outdoor race
      • Allan was confident that he had achieved the ‘correct amount of dehydration’ for what his body can tolerate before declining physical performance occurs, with ~1.05L (33oz) of fluid taken in throughout the race
      • As someone with a sweat sodium concentration of 1,412mg/L (mg/32oz), Allan potentially overdid his sodium intake relative to the amount of fluid he consumed, averaging ~1,905mg/L (mg/32oz) on the day. He could easily adapt this to be more in line with his losses by reducing his utilisation of Electrolyte Capsules, or drinking more plain water to dilute the concentration
      • Using a portable core temperature sensor during the race, Allan observed a very high reading during the last two hours. Due to being indoors, several cooling methods, like dumping water on his head and creating shade from the sun were out of the question, although his perceived comfort was aided by wearing a cooling headband


    Quick Carb Calculator Recommendation


    carb 30 mins before


    carb per hour during
      • As a seasoned professional at fueling for ultra events, Allan knows the importance of having enough stored carbohydrate for long-distance races. To ensure this was the case, Allan increased the proportion of carbohydrate in his diet while reducing the proportion of fibre and protein for ~36-48 hours pre race. His preparation culminated in his usual carb-rich breakfast of exactly 120g (~4oz) of oats, raisins and a 66g (~2.3oz) banana
      • A final pre-race PF 30 Gel increased Allan’s blood glucose and helped to spare some of his stored glycogen for utilisation later in the race
      • During one of the laps, he dropped a PF 30 Gel and planned to pick it up the next time around, but it had been cleared off the track and instead he had to improvise with 50ml (1.6oz) of coke, collected from aid stations. While Allan knew this wouldn’t replace the carbs that he’d lost from his gel, it was better than nothing and helped to somewhat maintain his blood glucose levels
      • Wearing a continuous glucose monitor throughout, Allan was able to share that he sat around 167mg/dL (typically within the optimal ‘performance zone’ according to Supersapiens). This was achieved with an average intake of ~49g of carb per hour, which is lower than the science would recommend. Despite this, his glucose remained stable throughout the race, meaning he was able to report strong and even energy levels at a 10 (out of 10)
      • With the Fuel & Hydration Planner suggesting ~75g/h for an event of this length and intensity, Allan may want to consider elevating his intake here. A good initial step for him would be to incorporate some targeted gut training sessions
      • Allan largely nailed his caffeine intake, taking ~300mg at 1 hour and 40 minutes in to ‘maximise the benefits’ for the rest of his 3 hour and 11 minute effort. This value puts someone of Allan’s weight at the high end of the general recommendation for performance benefits (3-6 mg/kg)
      • While he was conscious of not wanting to pee during the race and so omitted his morning coffee, he may have improved his usage of caffeine marginally by replacing his PF 30 Gel for a PF 30 Caffeine Gel 15 minutes before race start. This would have given him an additional mental and physical boost through the first half of the race


      • From a fueling and hydration standpoint, Allan was satisfied with his energy levels and hydration for this 50km run. There are some areas which could be tweaked for future events, such as his carb intake per hour, but he can be largely satisfied with this part of his day
      • Looking to future races, Allan suffers from atrial fibrillation and has undergone unsuccessful surgery in the past to cauterise ineffective nodes within the heart. Unfortunately, after undergoing further surgery, his heart rate and pace during this race suggests that his surgery wasn’t successful in resolving the issue
      • He’s looking at how he can manage this issue without any potentially serious consequences moving forwards

    Key info

    Allan Hovda

    Sweat sodium concentration
    Sweat sodium classification
    Very High
    * determined by a PH Advanced Sweat Test


    Overall Time

    Event information

    Bislett Ultra Challenge 50km
    Oslo, Noway
    11th February, 2023
    Total Distance
    50.0km / 31.1mi

    Race conditions

    Weather Conditions
    No Rain
    Min Temp
    16°C / 61°F
    Max Temp
    16°C / 61°F
    Avg Temp
    16°C / 61°F

    Athlete feedback

    Race Satisfaction
    Hydration rating
    I know that 2,5 litres of dehydration is something my body handles without negative performance consequenses so I will say I hit the "correct" amount of dehydration.
    Energy levels
    Unfortunately I got heart arrythmia after about 14km which definitly made me feel not great. So I will say its a 10, but other issues made the subjective feeling worse.
    Toilet stops
    I ensured I didnt need to pee by limiting my fluid intake before the race
    GI comfort
    No cramping

    Allan's Thoughts

     While I did perform about 10 seconds slower per kilometer than my goal I am truly pleased with that performance. The goal was set with the heart surgery was 100 % successful, and as it was not I can't complain about the result. Of course, I wished it otherwise, but the main goal for the race was to test the heart and find out if further measures has to be done. And on that I got an answer.

    Allan's full stats

     Carbohydrate (g)Sodium (mg)Fluid (ml)Caffeine (mg)Relative sodium concentration (mg/L)
    Total intake1552,0001,0503041,905
    Per hour4962833095

    Data Confidence







    There is good confidence in the accuracy of the data reported. An athlete feels that the numbers closely reflect what they consumed despite a couple of estimations which may carry some degree of error. The majority of what was consumed is recorded to a high level of specificity (most volumes are known through the use of bottles brands quantities flavours). The numbers are very plausible and align with previous data recordings (if an athlete has collected data previously).

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