(PRE-RUN) ENDURANCE FUEL™
40G+ CARBS, 500 MG+ SODIUM + CAFFEINE
Designed with clean, fast-digesting carbs, key electrolytes, and optional caffeine, it fuels endurance, delays fatigue, and keeps you feeling strong through every type of run.
15 runs fuelled — just $4.30 each.
Less than your morning coffee, with more energy than any flat white ever could.
Complete your kit with our Race Tee
Nutrition Facts
Nutrition Facts
Ingredients
Maltodextrin (55%), fructose (33%), natural flavours, himalayan sea salt, magnesium citrate, potassium chloride, food acid (malic), coffee extract (natural caffeine)*, natural colour (curcumin extract*, beetroot extract^), sweetener (sucralose).
*Tropical Flavour only ^Berry Flavour only
How to use
Mix 2 flat scoops (45g) in 500ml of icy, cold water. Consume 1 serve daily.
ENDURANCE, UNINTERRUPTED
With 40g+ of clean carbohydrates in a 2:1 blend and 500mg+ sodium, it fuels performance without gut distress. Electrolytes replace what’s lost in sweat. Tropical flavour includes caffeine to enhance focus and energy.
EVIDENCE BASED FORMULAS TAILORED FOR RUNNERS
The Science Behind SUB:3 Pre-Run Fuel
BOOSTS ENDURANCE PERFORMANCE UP TO 8%
Our pre-run glucose-fructose blend is inspired by research showing that drinks combining these carbohydrates at high intake rates can improve running performance by around 8 %.
DELIVERS ~65% MORE CARBOHYDRATE ENERGY
A 2:1 carbs blend increases carbohydrate oxidation by ~65% compared to glucose alone, supplying muscles with more sustained energy during prolonged exercise.
Jeukendrup A, Sports Medicine (2014)
IMPROVES HYDRATION AND REDUCES GUT DISCOMFORT
Dual-source carbohydrates and electrolytes improve fluid absorption, accelerating gastric emptying and reducing gastrointestinal distress during high-intensity exercise.
Jeukendrup A, Sports Medicine (2017)
DELAYS FATIGUE BY UP TO 34% WITH CAFFEINE
A moderate dose of caffeine in our formula can reduce perceived effort and extend time to fatigue; one trial reported a 34 % longer time to exhaustion with caffeine versus placebo.
★★★★★
Trusted by Elite Runners
SUB:3 Pre-Run Endurance is used by our elite ambassadors like Tim Vincent to power through high-mileage weeks and race-day efforts. When performance matters, they rely on the same clean, fast-absorbing formula designed for real runners, just like you.
WHAT CUSTOMERS ARE ASKING?
What’s the ideal timing to take SUB:3 Pre-Run?
For optimal absorption and performance benefits, consume your SUB:3 Pre-Run Endurance 30–45 minutes before your run.
This timing aligns with established guidelines suggesting that ingesting 1–4 grams of carbohydrates per kilogram of body weight within 1 to 4 hours prior to exercise can maximize endurance performance. This approach helps top up liver glycogen stores and maintain stable blood glucose levels during prolonged activity.
Is it suitable for sensitive stomachs?
Yes. SUB:3 Pre-Run Endurance is formulated with a 2:1 ratio of maltodextrin to fructose, a combination shown to enhance carbohydrate absorption and reduce gastrointestinal (GI) discomfort during endurance activities. This ratio leverages separate intestinal transport pathways—SGLT1 for glucose (from maltodextrin) and GLUT5 for fructose—allowing for higher carbohydrate uptake rates without overloading a single pathway, which can lead to GI distress.
Research indicates that consuming multiple transportable carbohydrates in this ratio can increase carbohydrate oxidation rates and minimize GI symptoms compared to single carbohydrate sources. This makes SUB3 Pre-Run a gut-friendly option for athletes seeking to optimize performance without compromising digestive comfort.
What’s the difference between Berry and Tropical?
Berry is our caffeine-free option—smooth, clean, and easy to sip. It’s ideal for runners who are caffeine-sensitive, or anyone who prefers to keep their stimulant intake low. Despite being caffeine-free, Berry still delivers the full performance benefit of SUB3 Pre-Run, including fast-absorbing carbs and essential electrolytes to energise and hydrate.
Tropical, on the other hand, includes a moderate dose of caffeine, making it perfect for runners who want an extra edge. Caffeine is one of the most widely researched and proven performance aids in endurance sport. It has been shown to enhance mental focus, reduce perceived exertion, increase fat oxidation, and delay the onset of fatigue, all of which can improve running performance, especially during longer or more intense efforts.
If you’re sensitive to caffeine, Berry is your best bet, giving you the same endurance and hydration benefits without overstimulation. But if you’re gearing up for a morning run, race day, or a tough training block, Tropical delivers a powerful combination of flavour and focus to help you stay sharp from the first step to the last.
Is SUB3 approved for competitive athletes?
Yes. SUB3® is independently tested for banned substances to ensure it meets the highest standards of safety and compliance. We understand the importance of clean sport, which is why we take rigorous steps to verify that our products are safe for use by tested athletes.
If you require certification for your sport or organization, we’re happy to provide documentation. Simply contact us and we’ll supply the relevant batch testing reports.
Can I take SUB3 Pre-Run during my run?
Yes. While SUB:3 Pre-Run Endurance is formulated to prime your body before running, its gut-friendly composition makes it suitable for consumption during longer efforts.
For endurance activities lasting between 1 to 2 hours, consuming approximately 30–60 grams of carbohydrates per hour can enhance performance and delay fatigue.
SUB:3 Pre-Run Endurance provides a convenient source of these carbohydrates, along with essential electrolytes, to support sustained energy and hydration throughout your run.
Have more questions? Contact us.
