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John Borstelmann's scorecard

Gravel Worlds

Saturday 21st August, 2021

Within recommended ranges

Just outside recommended ranges

Significantly outside recommended ranges

  • 65g

    Carb per hour
  • 877mg

    Sodium per hour
  • 884ml

    Fluid per hour
  • 992mg/L

    Relative sodium concentration
  • 422mg

    Total caffeine
  • How John hit those numbers

    1L x PH 1500 (Tablets)
    4 x Slices of toast
    3 x Black coffee
    3.5L x PH 1000 (Tablets)
    1L x PH 1000 (Drink Mix)
    1L x PF Carb & Electrolyte Drink Mix
    500ml x Additional fluid in mixed drinks
    1 x Energy gel (22g carb)
    4 x Energy gel with caffeine (22g carb, 75mg caffeine)
    0.5 x Energy chew packet with caffeine (48g carb, 100mg caffeine)
    1 x Energy chew packet with electrolytes (48g carb, 200mg sodium)
    1 x Energy gel (21g carb)
    1 x Energy gel with caffeine (23g carb, 20mg caffeine)
    250ml x Cola Taste
    1 x Energy Bar (38g carb)
    1 x Energy Bar (33g carb)
    1 x Energy gel (24g carb)

    How John's hydration and fueling went...

      • John raced brilliantly at the Gravel Worlds, defending his title and winning in a time of 7 hours 4 minutes, whilst pushing a normalized power output of around 318w
      • The conditions were somewhat cooler than his most recent race (Steamboat Springs), and with thankfully fewer crashes, mechanical issues and dropped bottles, John stuck to a broadly similar hydration and fueling plan


      • Ahead of the race John preloaded sensibly by sipping on 2 x PH 1500s (in 1L/32oz of water) around an hour and a half, up to 45 minutes before the race start. This meant he would have started the race well hydrated having followed our preloading guidelines almost to the letter
      • John’s sodium intake was 877mg/hr, slightly lower than his last race (909mg/hr). That sodium predominantly came from the PH 1000 drink mixes and tablets that he added to his 1L bottles. Given the race conditions (25°C/77°F), the long duration and John’s relatively high sweat sodium concentration of 1,310mg/L, we think this was a suitable consumption level that will have replaced a decent proportion of what John lost in his sweat
      • John didn’t cramp at all (having had issues with this in the past), but said that he could tell he was relatively close to cramping when he followed his main rival Colin Strickland’s last attack with 25km to go. Luckily, there weren’t many surges after that so he felt fine and had enough of a kick left to take the sprint
      • John drank a total of ~6.25L (~220oz) of fluid, which equates to ~884ml (~30oz) per hour. John stopped to pee early on in the race (55 minutes in) and then had the urge to pee again 30 minutes later, linking this to the three coffees he drank before the start. When you factor in the fluids he had before the start, this may well have been the case


    Quick Carb Calculator Recommendation


    carb 30 mins before


    carb per hour during
      • We typically recommend taking in ~30g carb (in the form of a gel) ~15 minutes before a race of this length, especially if it’s an early start and your breakfast was light
      • John chose not to do this, but did have a large, carb-rich breakfast 2 hours before the start, so will have begun with his energy stores pretty well topped off regardless. Learn more
      • Taking in 60-90g of carb per hour over the course of a race of this length and intensity is what both the scientific evidence and our experience suggests is likely to be optimal for a rider of John’s ability
      • He consumed about 65g/hr, primarily from PF 30 Energy Drink Mix topped up with some gels and energy chews. This was higher than his last race (53g/hr), where he unfortunately dropped a bottle of fuel in the early stages, a factor that almost inevitably pulled his total energy intake numbers down
      • We feel that there’s room for John to experiment with taking in a little bit more carb in some events. He has already undertaken some gut training where he has been able to sustain 80g/hr over the course of 6 hours. It’ll be interesting to see what impact additional fueling has on his performances
      • John didn’t experience any GI issues, stating that his ‘stomach felt fine all day’ and rating his GI comfort at 8/9 out of 10. He commented that his energy levels were high overall, being around a 7 out of 10 for the first hour then between 8/9 for the rest of the race
      • John also consumed ~422mg of caffeine over the race (~50mg/hr), mostly from gels and Coca Cola. The recommended caffeine dose for performance is 3-6mg per kilogram of bodyweight, which puts him within his own recommended range (237-474mg)


      • Overall, John raced brilliantly and underpinned his performance with great execution of his hydration and fueling plan. Understandably, as the race winner and defending World Champ he rated his satisfaction with the outcome as 10/10!

    Key info

    John Borstelmann

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


    Overall Time
    Normalised power (Bike)

    Event information

    Gravel Worlds
    Nebraska, Lincoln
    21st August, 2021
    Total Distance
    241.4km / 150.0mi
    Total Elevation
    3,350m / 10,991ft

    Race conditions

    Weather Conditions
    Very Hot
    No Rain
    Min Temp
    17°C / 63°F
    Max Temp
    29°C / 84°F
    Avg Temp
    25°C / 77°F

    Athlete feedback

    Race Satisfaction
    Hydration rating
    Energy levels
    Toilet stops
    GI comfort
    No cramping

    John's Thoughts

     Everything went much more smoothly than my last race. My gut felt fine and I didn't cramp at all. I had a decent kick left for the sprint

    John's full stats

     Carbohydrate (g)Sodium (mg)Fluid (ml)Caffeine (mg)Relative sodium concentration (mg/L)
    Total intake4576,2006,250422992
    Per hour6587788460

    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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