
Jonny Green
Amstel Gold Sportive
Jonny's headline numbers
Jonny'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.
For a 10-hour ride with 3,000m / 9845ft of climbing, Jonny built, practised and executed a consistent fueling strategy that got him close to his target of 90g of carb per hour. He managed to average ~82g/h across his elapsed time which is well in line with the guidelines for rides of this duration and intensity. To achieve this, he took one PF 90 Gel each hour, except for hours 3-4 and 7-8, where he swapped these for PF 60 Chew Bars. He stuck to his pre-planned gels and chews, and impressively had no stomach discomfort despite taking on more fuel than he has in past races. Looking ahead to Unbound Gravel in a couple months, Jonny plans to further refine his fueling. He reported some extended periods without fueling and then having to take larger doses of gel than he wanted. To help fuel more consistently, he could explore other carbohydrate setups particularly for a more technical course (likely with the help of PF 300 Flow Gel in Flow Flasks).
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.
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 Jonny’s losses are on the moderate side, getting his hydration strategy right is still important if he wants to perform at his best.
Learn moreAs a member of the PF&H Marketing Team, Jonny is well aware of his sweat sodium concentration (901mg/L) thanks to a Sweat Test. He matched the concentration of his intake to his losses to help maintain fluid and electrolyte balance by using PH 1000 across the first four hours of the ride before switching to plain water and Electrolyte Capsules (having 2 per every 500ml water bottle). He stuck to his plan of drinking ~500ml of fluid per hour, which he felt was sufficient for much of the ride and supported his performance. However, as temperatures rose, Jonny acknowledged he could’ve increased his fluid intake. He also didn’t pee during the 11 hours he was on the bike, which may indicate underdrinking and a bit of dehydration. Ahead of Unbound, Jonny should perform some sweat rate data collection, both in controlled conditions like in the Precision Performance Lab, and out in the real world, to get a picture of how his sweat rate varies in different environments and therefore how much he should be drinking under varying race conditions.
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.
Jonny chose not to use caffeine during the event, as he hasn’t noticed a clear benefit from it in the past and was mindful of the potential negative side effects. That said, as a regular coffee drinker with a good caffeine tolerance, it’d be worth trialling a strategic caffeine dose through PF 30 Caffeine Gels in training ahead of future races. Caffeine is a well-researched ergogenic aid with a strong body of evidence showcasing its performance-enhancing effects for endurance exercise.
How Jonny hit his numbers
Here's everything that Jonny ate and drank on the day...
Jonny's weapons of choice
Final thoughts
Jonny's full stats
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.