• Sophie Power is an ultra-endurance runner, mother of 3 and founder of SheRACES, a campaign for equity for women in racing. She competed for Team GB in the IAU 24-hour European Championships in Verona, Italy
• On the 1.5km lapped course, Sophie recorded a 24-hour personal best of 218.8km covered, burning just under 14,000 calories in the process!

Hydration

• Sophie preloaded both the night before and the morning of the race using PH 1500 (Tablets) mixed in ~500ml/16oz of water to ensure her blood plasma volume was topped up and she was optimally hydrated when she got to the start line
• During the run, Sophie drank between ~250ml/8oz and ~850ml/28oz per hour, adapting on the fly to effectively replace a good proportion of what she was losing during hotter periods of the day and dialling her intake back when it was cooler overnight
• Sophie’s main source of electrolytes came from the PF Energy Drink Mix, which contains 1,000mg of sodium per litre and this helped her to achieve an overall relative sodium concentration of ~895 milligrams per litre. We know from Sophie’s Sweat Test that she loses 941mg of sodium per litre of sweat, so she will likely have replaced a large proportion of her sweat sodium losses

Fueling

Conclusions

• Through the use of the Supersapiens technology, as well as prior knowledge of her sweat sodium concentration and sweat rate, Sophie successfully executed her pre-planned fuel and hydration strategy to avoid dehydration and bonking on the day.
• Supersapiens’ David Lipman concludes: “Sophie’s experience and the insight from her Supersapiens trace highlighted the fact that continuing to consume carbohydrates late in an ultra may be difficult, but it’s at this time when it’s most crucial because glycogen stores are at their lowest and fatigue is at its highest. The body needs glucose and with low stores, there’s only one way to get it - by eating and getting more fuel on board!”