Oliver Hobson
La Rochelle Marathon
Oliver's headline numbers
Oliver'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.
Prior to starting the race, Oliver ate a high-carb breakfast to increase his glycogen stores and top up his energy levels. He could have benefited from taking an additional ~30g dose of carb, such as a Gel or Chew, in the last 30 minutes as a final boost to spare glycogen stores for later in the race. Considering his efforts to carb-load, Oliver’s lower than recommended intake during the race may have been just enough to maintain his energy levels across this race and see him to the finish line. However, the science suggests that intakes higher (~60-90 grams of carbohydrates per hour) would be more suitable given the intensity and duration of the race. Fortunately, Oliver didn’t experience any GI issues during the race thanks to regularly practicing his fueling strategy and training his gut. This comfort level bodes well for Oliver increasing his intake in future races to further enhance his energy levels and performance.
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.
Given Oliver’s losses are Very High (1,556mg/L), nailing his hydration strategy remains important, even when it’s Cold.
Learn moreWithout performing any targeted sweat rate testing it's tricky to pinpoint Oliver’s exact sweat losses for a race of this duration and intensity. Given the mild, wet conditions he was racing in, it’s likely his sweat rate and subsequent sweat losses were lower than average for him. Oliver attempted to increase his sodium intake prior to the race by consuming a bottle of PH 500 on the morning of, but he’d be better off swapping the PH 500 (Tablet) to a PH 1500 (Tablet). By drinking a stronger electrolyte drink, he will successfully pre-load, maximizing his blood volume and optimizing his pre-race hydration status. During the race itself, Oliver didn’t consume any sodium and luckily avoided any cramping episodes. In his future training and racing, he could get a Sweat Test to see how salty his sweat is and perform sweat rate testing to quantify his total fluid losses. As an estimate, he could start by carrying a Soft Flask with some PH 1000 to gradually replace his losses and see if this helps him avoid cramping or other dehydration-related symptoms.
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.
Oliver didn’t consume any caffeine during the race, but did drink a coffee with his breakfast. Despite not meeting the recommended scientific guidelines of the stimulant based on body weight, he would have benefited slightly from the morning caffeine dose. Still, to further enhance his perceived energy levels and reap the ergogenic benefits of the stimulant he should look to include some in his race strategy. He could do this by having a caffeinated gel which we would recommend he trials during some training runs ahead of his future races.
How Oliver hit his numbers
Here's everything that Oliver ate and drank on the day...
Oliver's weapons of choice
Final thoughts
Oliver'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.