Lauren Puretz
Gorge Waterfalls 50km
Lauren's headline numbers
Lauren'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.
Lauren doesn’t enjoy eating much during races, so she usually chooses to consume more energy-dense gels. However, she felt hungry during the race and found herself fueling more frequently than in her previous races. This increased hunger was likely as a result of a slight change to her pre-race nutrition, as she didn't have her usual pre-race high carbohydrate breakfast or her usual final gel in the last 30 mins before the race. Regardless, Lauren managed to stick to her overall fueling target during the race to reach and exceed the recommended carb guidelines without any GI discomfort.
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 Lauren’s losses are on the moderate side, getting her hydration strategy right is still important if she wants to perform at her best.
Learn moreLauren experienced some cramping in her calf in the last three miles of the race after she had a small fall. It’s fairly common for runners to get cramps in the latter stages of endurance events, so understanding the multifactorial causes of cramp can help when reflecting post-race. In Lauren’s case, it may have been prevented, or at least attenuated, by increasing her relative sodium concentration to more closely match her losses, but this twinge was most likely a result of the fall itself and didn't last too long. Since the milder climate in this race discouraged her from consuming the fluids she was carrying, it would be good practice for Lauren to start increasing her fluid intake in preparation for the warmer conditions expected at Western States in a few months to get her body used to tolerating more fluid.
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.
Lauren’s caffeine intake was in line with the recommended guidelines for races of this duration. Despite consuming a PF 30 Caffeine Gel earlier in the race than she usually would, she could have benefited from pre-caffeinating in the last 30 mins before the race, and strategically timing another caffeine gel later on to perhaps offset the symptoms of fatigue.
How Lauren hit her numbers
Here's everything that Lauren ate and drank on the day...
Lauren's weapons of choice
Final thoughts
Lauren'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.