Three-time ironman champion
A top age-grouper who became a professional in 2020, Ruth Astle is currently ranked 19th in PTO World Rankings. Training out of Leeds in UK, Astle is a powerful cyclist who is quickly closing in on the very top-ranked professionals in the sport. In her two full Ironman competitions in 2021, Ruth won both races by significant margins. She also broke the bike course record in Mallorca. In late 2022, she cracked the top-20 with a dominant win at the inaugural Ironman Israel. 2023 saw a 12th place finish at IM Worlds for Astle. As she looks ahead to 2024, she is firmly focused on a top-5 finish in Nice.
I use C90 as my staple on the bike. I mix 2, 3, even 4 servings in a single bottle and use it as my portable fuel source.
Ruth's pick
C90 High Carb Drink Mix
£34 /Guides & Guidance
Practical training and nutrition advice to help you perform your best.
In this article, we compare the different types of carbohydrate sources so you can decide what works best for you!
Using the right combination of carbohydrates can improve energy delivery to the muscle.
Caffeine can help to improve endurance performance, but what is the best way to take it?
Is more protein always better?
Eating in the hour before was said to be detrimental to performance, but research shows otherwise.
Not all GI problems are avoidable, but taking these 10 steps will minimize your chances of developing them.
Discover Science
Helping athletes perform their best through the sharing of unbiased and simplified scientific knowledge.
