Steph's headline numbers
Steph'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.
Steph has spent several months training her gut to tolerate such high carb intakes so she can train and recover optimally. Despite feeling like her energy levels were below par, she rated her GI comfort a solid 10 (out of 10) showing how effective this practice has been. Although her perception of ‘feeling a little flat’ in the early stages, averaging ~108g per hour set her up for a strong finish
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 Steph’s losses are High (1,106mg/L), nailing her hydration strategy remains important, even when it’s Mild.
Learn moreSteph’s previous IM 70.3 was in Staffordshire where she accidentally diluted her electrolyte concentration too much on the run by drinking lots of water. This time in Lahti she managed her electrolytes perfectly on the bike, but over-concentrated on the run by having a double-strength Soft Flask of PH 1500 and six Electrolyte Capsules, without drinking much water. In future she could consider reducing the amount of Electrolyte Capsules slightly, to achieve a concentration closer to her sweat sodium of 1,107mg/L, as determined by a Sweat Test.
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.
Steph has found great benefit from regularly taking caffeine during her races, and falling within the 3-6mg/kg recommended dosage will certainly have helped her reap the associated benefits
How Steph hit her numbers
Here's everything that Steph ate and drank on the day...
Steph's weapons of choice
Final thoughts
Steph
PF&HSteph'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.