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Lars Wichert's scorecard

Challenge Almere-Amsterdam

Sunday 11th September, 2022

Within recommended ranges

Just outside recommended ranges

Significantly outside recommended ranges

  • 109g

    Carb per hour
  • 795mg

    Sodium per hour
  • 449ml

    Fluid per hour
  • 1,770mg/L

    Relative sodium concentration
  • 100mg

    Total caffeine
  • How Lars hit those numbers

    500ml x PH 1500 (Drink Mix)
    1 x Bowl of Muesli and Raisins
    1 x Piece of Bread with Chocolate Cream
    1 x PF 30 Gel
    *** Try to avoid drinking too much at this point in the race!
    1.3L x PH 1500 (Drink Mix)
    2.33 x PF 30 Gel
    2 x PF 90 Gel
    500ml x PH 1500 (Drink Mix)
    4 x PH Electrolyte Capsule
    1 x PF 30 Caffeine Gel
    1 x PF 90 Gel
    50ml x Energy drink mix (44g carb)

    How Lars' hydration and fueling went...

      • Lars is a member of the 2022 Zwift Triathlon Academy with a strong record when it comes to triathlons. His first ever swim-bike-run was at IRONMAN Hamburg in 2021 where he finished first overall age grouper, and broke the amateur IM World Record in a blistering time of 8 hours, 12 minutes and 46 seconds!
      • He raced Challenge Almere-Amsterdam as a final preparation race ahead of the IM World Championships in Kona, Hawaii, this October, and said he was “very pleased with how the fuel and hydration strategy worked”


      • Lars has a high sweat rate and so fluid replacement has been a focal point during this triathlon season
      • Lars drank a ~500ml/16oz bottle of PH 1500 (Drink Mix) with dinner the night before the race and another with his breakfast on race morning. This will have preloaded his sodium levels to increase his blood plasma volume and optimise his hydration status ahead of the swim start
      • On the bike, he drank ~1.3L/44oz of water with two PH 1500 (Drink Mix) packets in. This is a slightly more diluted concentration than we’d normally recommend when using the 1500s. However, given Lars’ sweat sodium concentration of 655 milligrams per litre, and the mild temperatures on race day (~19℃/ 66℉), this diluted relative sodium concentration (~1,154mg/L) will likely have replaced a good proportion of his losses through sweat
      • Lars headed out of T2 with a 500ml/16oz Soft Flask of PH 1500 (Drink Mix) and four Electrolyte Capsules. He finished all of these, giving him a total sodium intake of ~1,774mg on the run
      • He only picked up one cup of on-course energy drink, so his total fluid intake was ~550ml/18oz, giving him a very high relative sodium concentration of ~3,225mg/L. This high concentration is likely what caused his extreme thirst in the latter stages of the run and after the race


    Quick Carb Calculator Recommendation


    carb 30 mins before


    carb per hour during
      • Lars began his carb-loading phase two days out from the race, increasing his intake of rice and noodles to ensure his liver and muscle glycogen levels were optimal come race day
      • On race day, Lars had a bowl of muesli with some raisins, followed by a piece of bread with chocolate cream on, further topping off his glycogen stores
      • Within the last 20 minutes before the swim start, Lars had a PF 30 Energy Gel which will have hit his bloodstream quickly, and this circulating glucose will likely have spared some of his stored energy for later in the race
      • He ate ~280g of carb during the bike leg of the race, averaging ~126g per hour, which is slightly above his target intake of 120g/h as he simply biked faster than anticipated! This intake is further support of the recent evidence which suggests that some top-level athletes can absorb up to 120g per hour without any gastrointestinal issues. Whilst we don’t have evidence to support the actual absorption of this quantity, Lars’ lack of GI distress and total comfort throughout the race is positive and suggests it’s likely he was absorbing most, if not all, of the carb he ate
      • Lars hit these numbers by adding two PF 90 Energy Gels and two-and-a-third's worth of PF 30 Energy Gels into a water bottle, along with the small amount of carb in his ~1.3L/44oz of PH 1500 (Drink Mix)
      • On the run, he carried a PF 90 Energy Gel and a PF 30 Caffeine Gel with him out of transition two, and consumed these, as well as a small cup of on-course energy drink mix, to average an impressive carb intake of ~106g/h. Overall, his average carb intake across the entire race was ~109g/h
      • This high intake is a testament to the rigorous and frequent gut training he’s undertaken during his regular training sessions, which has allowed him to comfortably absorb large amounts of carb


      • This was the first race since Lars suffered blood poisoning after catching COVID-19 nearly eight weeks prior, and therefore he’s extremely pleased to execute a good race and come away with 1st place
      • In future, Lars should aim to increase his fluid intake on the run and/or reduce the number of Electrolyte Capsules he takes, which would help to bring down the concentration of his fluid intake so it’s more in line with his sweat sodium concentration

    Key info

    Lars Wichert

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


    Overall Time
    Swim Time
    Bike Time
    Run Time

    Event information

    Middle distance
    Challenge Almere-Amsterdam
    Amsterdam, Netherlands
    11th September, 2022
    Swim Distance
    1.9km / 1.2mi
    Bike Distance
    90.1km / 56.0mi
    Run Distance
    21.1km / 13.1mi
    Total Distance
    113.1km / 70.3mi

    Race conditions

    Weather Conditions
    No Rain
    Min Temp
    16°C / 61°F
    Max Temp
    21°C / 70°F
    Avg Temp
    19°C / 66°F

    Athlete feedback

    Race Satisfaction
    Hydration rating
    Energy levels
    GI comfort
    No cramping

    Lars' full stats

     Carbohydrate (g)Sodium (mg)Fluid (ml)Caffeine (mg)Relative sodium concentration (mg/L)
    Total intake4493,2741,8501001,770
    Per hour10979544924
    Bike and Run
    Total intake4193,2741,8501001,770
    Per hour11992752428
    Total intake2801,5001,30001,154
    Per hour1266775860
    Total intake1391,7745501003,225
    Per hour1061,34741876

    Data Confidence







    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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