• Considering Fenella raced the IM World Championships just two weeks before, she had a solid day at the Challenge Championships
• After emerging from the lake swim in 3rd place, Fenella put together an impressive bike ride where she crushed her fuel and hydration plan
• The multi-terrain half-marathon run saw several athletes struggle to find a rhythm, but Fenella held strong to finish 4th against a stellar field of athletes

Hydration

• Fenella preloaded like she usually does with two PH 1500 tablets in ~1L/32oz of water on the morning of the race. This will have ensured her blood plasma volume was optimal, thus reducing the load placed on her cardiovascular system when pumping blood around the body
• On the bike, Fenella drank two bottles of PH 1500 which both had a PF 90 Gel in, giving her a total fluid intake of ~1.3L/42oz which equated to ~578ml/hr; a quantity in line with what we’ve seen Fenella drink previously
• Her average relative sodium concentration was ~1,418mg/L across the whole race, which considering her sweat sodium concentration of 1,331mg/L - measured by our Advanced Sweat Test - she will have replaced a large proportion of the sodium she lost in her sweat
• Fenella didn’t take a lot of fluid on the run, only grabbing water from a few aid stations and averaging ~226ml/hr (~8oz/hr). This number is lower than we saw Fenella drink at the IM World Championships and at IM Mallorca, but the temperatures at both these races were considerably higher than in Samorin, so Fenella sensibly dialled back her fluid intake. We would still recommend she increases her fluid intake on the run slightly, and perhaps include some sodium by taking Electrolyte Capsules as temperatures were approaching ~23℃/73℉ by the time she started the final run leg

Fueling

Conclusions

• Overall, Fenella raced well on fatigued legs to finish 4th in 4 hours 13 minutes. Her dialled fueling plan was well executed, thus ensuring her energy and hydration levels were sustained throughout the whole race
• She rated her race satisfaction at 6.5 out of 10, saying she just “didn’t have the bounce in her legs to push the run as hard as she wanted” but “considering I raced IM World Champs two weeks ago, I’m pretty happy”