
Danielle Lewis
IRONMAN 70.3® St George
Danielle's headline numbers
Danielle'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.
Coming off a DNF due to a bike positioning issue in Texas a few weeks prior, Danielle was understandably nervous for St George. Her normal pre-race breakfast came back up as she suffered with nausea due to these nerves, but she still managed to get down a PF 30 Caffeine Gel in the final 20 minutes before the gun. Her energy levels on the bike were great, as she relied on her ‘super bottle’ containing 210g carb consisting of Carb Only Drink Mix and PH 1500 (Drink Mix) mixed into a 1 litre bottle. While this is a pretty strong mixture and may not be suitable for every athlete, Danielle has trialled and practised this in training for the past couple of seasons, and alternating sips with her 750ml hydration-only bottle of PH 1500 (Tablets) works well for her. Since she took a PF 30 Gel at the very end of the bike leg, she delayed her fueling until a bit later into the run this time. Her average carb intake went from ~114g/h on the bike to ~61g/h on the run, which likely contributed to the fatigue she felt on this last leg. It may be helpful to move the final bike gel earlier so she can start fueling earlier on the run next time around.
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.
Even though St George is usually a dry, moderate climate race, this year it saw higher temperatures and made for a tough day out on course. Danielle has been working hard on increasing her sodium relative to the fluid she takes on, and made significant improvement last season on this, with the winning strategy for her being to diligently add PH 1500 (Tablets) to her front bottle as she drinks and refills with water. Staying on top of her sodium and fluid intake was crucial in this hot race, especially since Danielle’s learned through sweat rate measurements that she’s a very heavy sweater in hot conditions. Her fluid intake dropped off significantly on the run (going from ~1.3L/h to ~396ml/h), but for the 70.3® distance, this ‘frontloading’ on the bike carried her through the run, supplemented by a handful of aid station water cups and salt capsules.
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.
Danielle is used to using caffeine in her races, so it was a no brainer to include it in her strategy. After her morning coffee and pre-race PF 30 Caffeine Gel, she had an additional 200mg dose of caffeine once on the run. While her total intake was in line with the recommendations for harnessing the stimulant’s ergogenic benefits, it may be better to move or add a caffeine dose to when she’s on the bike in order to give it enough time to peak in her bloodstream (~45-60 minutes) and mask fatigue on the run.
How Danielle hit her numbers
Here's everything that Danielle ate and drank on the day...
Danielle's weapons of choice
Final thoughts
Danielle'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.