Tamara Jewett
T100 London
Tamara's headline numbers
Tamara'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.
Tamara‘s tried and tested fueling strategy worked as planned at the London T100 where she managed to stay on top of her nutrition averaging just above the recommended guidelines for a race of this distance and intensity. Her rigorous practice in gut training paid off as she rated her GI comfort as ten out of ten, whilst fueling with a mixture of PF 30 Chews, PF 30 Gels and PF Carb & Electrolyte Drink Mix consistently. As we often see in triathlons of this distance, Tamara front-loaded her fuel intake consuming ~72% of her total carb intake (355 grams) whilst on the bike. Often, athletes find it easier to tolerate higher quantites of carb on two wheels as the mechanical movement of running can affect digestion. This is reflected in Tamara’s slightly less aggressive approach to her fueling during the run leg.
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 Tamara’s losses are on the moderate side, getting her hydration strategy right is still crucial when it’s hot and/or humid as her higher sweat rate in these conditions can result in significant net losses over the duration of a race.
Learn moreWith warmer temperatures than usual in London, Tamara sufficiently managed her fluid intake to replace a significant proportion of her sweat fluid losses to avoid the detrimental effects of dehydration. However, Tamara’s sodium intake was less than recommended given her sweat sodium concentration. It would be beneficial for her to increase this in future races, as sodium is important for muscle contraction, fluid retention in the blood, and carb absorption in the gut. To achieve this, pre-race she could swap her PF Carb & Electrolyte Drink Mix for PH 1500 and supplement this with a PF 30 Gel or PF 30 Chew. The more concentrated electrolyte drink will help her to pre-load more effectively to ensure she maximises her blood plasma volume ahead of the race. As her sodium intake during the run dropped to nothing (bike: 474mg/L, run: 0mg/L) she could benefit from taking some Electrolyte Capsules to supplement the plain water from the aid stations to help dial in her hydration strategy to be closer in line with her losses.
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.
Tamara consumed no caffeine during the race, but pre-caffeinated with a coffee at breakfast and PF 30 Caffeine Gel in the last 30 minutes before the gun went off. With a half-life of ~4-5 hours, it’s likely this would have still been in her system during the race, supporting her performance. However, assuming she tolerates the stimulant well, Tamara could look to increase her caffeine intake by taking one or two Caffeine Gels at the start and/or end of the bike to further reap the ergogenic benefits, delay fatigue and sustain her energy levels.
How Tamara hit her numbers
Here's everything that Tamara ate and drank on the day...
Tamara's weapons of choice
Final thoughts
Tamara'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.