Hybrid event fuelling
A hybrid event asks you to run, lift, carry, push and repeat, often with only brief chances to eat or drink. Build your plan from the expected duration, organiser rules, station access and what your gut already tolerates. The biggest number is not automatically the best plan. Look for the smallest reliable system that keeps useful carbohydrate and fluid available without getting in the way of the next station.
The short answer
Begin with a familiar pre-event meal and arrive normally hydrated. For an event lasting about 45 to 75 minutes, carbohydrate during the event may be unnecessary or limited to a small familiar amount. For stop-start work lasting about one to two and a half hours, 30 to 60 grams of carbohydrate per hour is a recognised evidence-led range, but it is something to test rather than a compulsory target. Check where eating or drinking is actually allowed, choose a gel, chew or drink you can use without disrupting your breathing or grip, practice it in representative training and keep hydration separate when conditions demand more fluid than fuel.
Ready-made fuel packs
Use the 2-hour pack as a practical starting point, then adjust it to your expected duration, access and tolerance. Shorter events may need less.
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Start with the event
Hybrid fuelling is a logistics problem as much as a nutrition problem. The same carbohydrate target may be easy on a long run with a bottle and awkward in a crowded indoor event with fixed stations. Build the event map before you choose the product.
Write down the expected start time, moving-time range, warm-up window, likely temperature, run and station sequence, drink access, personal-carry rules and the last sensible point for food. If the website, entry email and technical briefing disagree, ask the organiser instead of guessing.
Duration
Use recent comparable training and the event structure to write a realistic range. Include likely station queues, transition distance and any time spent waiting for equipment. A plan for 55 minutes can look very different from one for 95 minutes, even when both events carry the same name.
Intensity
Running and hard stations raise your breathing rate and can make chewing or taking a concentrated gel uncomfortable. Mark the calmer windows where you can slow for a few seconds, swallow safely and use water if needed. Don't plan to eat while carrying, pushing or moving under load.
Rules
Open the current organiser rulebook, athlete guide and venue briefing. Confirm whether personal bottles, gels, belts or outside assistance are allowed, where aid is positioned and whether you can leave anything in a transition area. Rules and venue flow can change between organisers, seasons and locations.
Individual
Record the carbohydrate amount, fluid volume, caffeine dose and product used in representative sessions, along with any nausea, reflux, bloating or urgent toilet symptoms. A published range can't tell you what your gut will accept at race intensity. Persistent or severe symptoms deserve qualified medical or sports-dietetic advice.
Duration first
These are planning categories, not a diagnosis or a performance promise. The Australian Institute of Sport places brief exercise below 45 minutes in a no-carbohydrate-needed category, recognises small amounts for sustained high-intensity work around 45 to 75 minutes and gives 30 to 60 grams per hour for endurance and stop-start sport lasting roughly one to two and a half hours.
| Scenario | Starting point | Useful option | Avoid | Next decision |
|---|---|---|---|---|
| Under about 45 minutes | Normal pre-event eating and hydration usually do the main work | Water only if wanted and available | Adding fuel because other athletes carry it | Protect the familiar pre-start routine |
| About 45 to 75 minutes | Small amounts of carbohydrate may help some athletes | A familiar drink or small portion that is easy to use | Concentrated intake immediately before a hard station | Test whether any during-event intake improves the plan |
| About 1 to 2.5 hours | 30 to 60 g carbohydrate per hour is an evidence-led range for stop-start sport | Drink, gel with water, chew or another tested combination | Treating the upper end as a compulsory target | Turn the hourly range into two or three usable windows |
| Multiple events or heats | Replace carbohydrate and fluid between efforts according to the gap | Familiar low-fibre food, drink and a normal meal when time allows | One large recovery feed too close to the next start | Write the between-round timetable before travel |
| Hot, humid or unusually long conditions | Fluid demand may rise independently of carbohydrate demand | Separate water or electrolyte fluid from concentrated fuel where useful | Forcing fluid beyond thirst and the practiced plan | Rehearse the exact combination in comparable conditions |
On a phone, swipe the table sideways to compare every column. Verify current organiser rules before relying on personal carry or aid.
Before the start
Your pre-event plan should remove urgency. It gives you a familiar meal, one clear top-up decision and enough time to reach the venue, check in and warm up without carrying a heavy stomach.
If you have diabetes, a history of disordered eating, significant gastrointestinal illness, food allergy, medication interactions or another medical condition that changes your eating or fluid needs, seek individual advice instead of adapting a generic event guide.
Day before
Don't arrive after a day of accidental restriction because travel, nerves or a late weigh-in pushed out your normal meals. Use familiar carbohydrate-rich food across the day, include normal protein and fluids, and avoid turning the evening meal into an oversized digestion test.
Pre-event meal
Base the meal on foods you already use before quality training. Keep fibre, fat, spice and portion size within your normal tolerance. The right timing varies with the start time, your appetite and the meal, so practice the gap instead of treating a universal three-hour rule as exact.
Final hour
A compact carbohydrate option can help when the main meal was early, the start is delayed or nerves limit your appetite. Keep it familiar and small enough to sit comfortably through the warm up. More is not automatically better, especially before burpees, sled work or loaded carries.
Caffeine
Check the labels on coffee, gels, drinks and pre-workouts so separate products do not create an unintended total. Caffeine is optional, not a requirement. Consider your sensitivity, medication, anxiety, late start times and sleep. The first trial belongs in training, not in the event pen.
During the event
A useful during-event plan fits on one line: what, how much, where and what happens if the window disappears. It should work with the event instead of demanding attention that belongs on movement standards, course flow or safety.
For longer hybrid events, use the hourly range as arithmetic, then turn it into the real event. A 90-minute target of 30 to 60 grams per hour becomes 45 to 90 grams in total, but the upper end is not automatically right for you. Start with what you have practiced at a comparable intensity.
Window
Choose a moment after your breathing has settled enough to swallow safely and before the next hard station begins. A few deliberate seconds are more reliable than trying to save time while coughing, gripping equipment or moving through a congested lane.
Dose
If your plan calls for 40 grams across an event, that may mean two small portions instead of one concentrated hit. Read the current label because gels, chews and drink mixes do not all provide the same carbohydrate per serving. Mark the package or bottle when you will use only part of it.
Water
Most concentrated gels are intended to be taken with water; a small number are specifically made otherwise. Drinking enough to swallow doesn't complete your full hydration plan. Carbohydrate and fluid are connected decisions, but you may still need different amounts of each.
Fallback
If an aid point is absent, a queue is longer than expected or you lose a carried item, don't automatically double the next intake. Return to the time remaining, your symptoms and the water available. A slightly lower total may be safer than forcing an untested concentrated dose.
Access and fuel choices
There isn't a gel, chew or drink that is universally fastest or gentlest. Compare carbohydrate per serving, fluid requirement, packaging, caffeine, texture, opening method and the window you have in the event. The current product label is the source of truth for ingredients and serving information.
Don't use the event to test a new flavour, concentration, caffeine dose or sweetener. If a product repeatedly produces symptoms in representative training, extra determination on race day is not the answer.
Drink
A carbohydrate-electrolyte drink can spread your intake across smaller sips and may be easier than opening packaging. The trade-off is carrying it or relying on aid access. Concentration matters: extra powder can make the bottle harder to tolerate rather than simply more effective.
Gel
A gel is useful when you need a known carbohydrate portion in very little space. Check whether it contains caffeine or meaningful sodium and follow the fluid directions. You still need to open, swallow and dispose of it within the rules and the transition available.
Chew
Chews can be divided across the event, which may suit athletes who prefer smaller doses. They also need chewing and can feel awkward with a dry mouth or high breathing rate. Practice that exact texture after running and before grip-heavy stations.
Everyday food
Familiar low-fibre foods can work well before an event or between heats. During a short, intense hybrid race, carrying, chewing and digesting them may be less practical. Sports foods are tools for specific situations, not replacements for the nutrient-dense meals that support your wider training week.
Gut and hydration
Gut training means repeated, progressive practice with carbohydrate during exercise. It is not a last-week challenge to consume the largest possible dose. A 2024 systematic review found potentially favourable effects from carbohydrate gut training and some short-term dietary strategies, while also showing that the evidence and individual response vary.
Your hydration needs can move independently from your carbohydrate needs. Hot conditions may call for more fluid without more fuel. A concentrated gel may add carbohydrate without providing enough fluid. Build the two lines of the plan together and test the combination.
Rehearse
An easy jog doesn't recreate the breathing, impact and abdominal pressure of running into sleds, lunges or carries. Test the plan inside a controlled session with similar duration and transitions, while keeping the purpose of the training intact.
Progress
Increase the carbohydrate amount, fluid concentration or caffeine separately so you can understand the response. Record the product, dose, timing, water, conditions, perceived effort and symptoms. Repetition can improve confidence and may improve carbohydrate tolerance, but it isn't a reason to ignore warning signs.
Hydration
Arrive normally hydrated and use your training observations, the conditions, access and thirst to shape the plan. Individual sweat rate can help in longer or hotter work, but replacing every gram lost is not a universal requirement. Excessive fluid intake can be dangerous as well as uncomfortable.
Stop
Chest pain, fainting, confusion, severe breathing difficulty, repeated vomiting or a significant acute injury are not problems to solve with a gel or drink. Stop and seek event medical help. Persistent gastrointestinal symptoms, unexplained weight change or concern about low energy availability should be discussed with an appropriate clinician or sports dietitian.
Worked plan and recovery
Recovery depends on what comes next. A multi-heat day, a long drive home and a rest day do not need the same response. Decide before the event where food and fluid will come from, particularly when the venue options are uncertain.
For tested athletes, supplements also carry an anti-doping decision. UK Anti-Doping states that no supplement can be guaranteed free of prohibited substances and advises athletes to assess the need, risk and consequences, including checking the actual batch instead of relying on a brand-level claim.
First
Cool down, collect your belongings, follow the organiser flow and notice heat, nausea or injury before forcing food. If another heat is close, the gap creates the urgency. If you do not train again until tomorrow, your next normal meal can often do most of the recovery work.
Carbohydrate
Carbohydrate supports glycogen restoration, especially when another demanding effort follows soon. Use something easy and familiar when your appetite is low, then return to normal meals. Don't let a recovery drink push out the rest of the day's food by default.
Protein
Protein supports repair across the training week, but crossing the finish does not create a ten-minute deadline. Include a familiar serving in your next snack or meal. The whole day and consistent training nutrition matter more than a dramatic recovery ritual.
Review
Record the actual duration, intake, water access, stomach comfort, energy, concentration and anything left unused. Separate pacing errors from nutrition errors where you can. One honest review is more useful than copying a new plan from the fastest athlete in the results.
Worked example
This example assumes you have used the meal, top-up and during-event portion in representative training; the organiser permits the chosen carry method; water is available; and no medical condition changes the plan. It is a decision aid, not a prescription.
| Window | Fuel decision | Fluid decision | Avoid | Check |
|---|---|---|---|---|
| Three to four hours before | Familiar meal used before quality training | Normal fluid with the meal | Large experimental meal or new supplement | Confirm travel, check-in and start time |
| Thirty to sixty minutes before | Optional familiar carbohydrate top-up if the meal was early | Small familiar drink according to thirst and plan | Unplanned caffeine stacking | Begin the practiced warm up |
| Early event | Settle pace and use no intake unless the rehearsed plan calls for it | Use permitted water access | Fuel while breathing is uncontrolled | Protect the next station |
| Mid to late event | Use the pre-written portion in a calm transition | Take required water and reassess conditions | Double intake after a missed window | Return to pacing and movement standards |
| After the finish | Familiar carbohydrate and protein according to the next demand | Replace fluid gradually without forcing excess | Treating serious symptoms as ordinary fatigue | Record actual intake and response |
On a phone, swipe the table sideways. Replace every example with your tested quantities and the current event rules.
Turn the event map into a starting point
Add the expected duration, intensity, experience and conditions, then compare a practical fuel and hydration starting point. Return to the organiser rules, current labels and your own training notes before deciding what to carry.
Practical guidance only. Test products, quantities, timing and fluid in representative training before event day.
Choose only after the plan is clear
Read the current product label and check availability before you buy. Choose a gel or drink because it fits a plan you have practiced. No product replaces a familiar pre-event meal, organiser rules, representative training or individual medical and nutrition advice.
Compact, measured carbohydrate for a plan with a suitable water and access window.
Useful when your event or training setup lets you plan fuel and fluid together.
Common questions
Use these as starting points, then return to the current organiser rules, product labels and your own training evidence.
Not automatically. Start with the expected duration, pre-event eating, organiser rules, water access and what you have tested. Shorter events may need no during-event carbohydrate. For longer stop-start events, a gel can be one practical way to reach a tested carbohydrate range, but concentrated gels usually need water and must fit a safe transition.
For stop-start sport lasting about one to two and a half hours, 30 to 60 grams per hour is a recognised evidence-led range. It is not compulsory for every athlete. Turn the range into total event grams, then split it into portions you can access and tolerate. Use representative training and qualified advice when needed.
Choose according to your separate fuel and fluid needs. A sports drink can supply both, while water lets you pair fluid with a gel, chew or pre-event food. Heat may raise fluid need without raising carbohydrate need. Check the drink concentration, current label, event access and your own response instead of assuming one option is always better.
Use a familiar carbohydrate-rich meal or snack that you have tolerated before quality training, with normal fluid and enough time to digest. Practice the portion and timing during training. If your appetite or the early start makes a full meal difficult, use a smaller familiar meal and a tested top-up instead of improvising on event morning.
Check whether the gel should be taken with water, start with a tolerable amount, avoid changing several things at once and practice at a representative intensity. Record the symptoms and exact product, dose, water and timing. Persistent, severe or unexplained symptoms should be discussed with an appropriate clinician or sports dietitian instead of managed only by swapping products.
Sources and further reading
RSG used current organiser material, authoritative sport-nutrition guidance and peer-reviewed research. External guidance informs the framework; it does not replace individual medical or sports-dietetic advice.
Current organiser route for competition rules. Athletes should also check their event-specific athlete guide and technical briefing.
Current official singles sequence, participation, venue process, movement standards and penalties linked from the rulebook route.
Authoritative duration-based carbohydrate ranges, stop-start sport context, fluid and fuel separation, and gut-training guidance.
Practical gel composition, water, dose, tolerance, dental, caffeine and food-first considerations.
Periodised food-first nutrition, competition carbohydrate and fluid, recovery, low energy availability and individual planning.
Current systematic review of carbohydrate gut training and dietary approaches, with useful evidence boundaries.
Individual fluid planning, sweat-rate context and risks from both inadequate and excessive intake.
Strict liability, need and risk assessment, actual-batch checking and the limits of supplement safety claims.
