A long run that falls apart in the final 30 minutes is not always a fitness problem. It is often a fuelling problem. Effective long run fuelling strategies allow you to complete the session at the intended quality, recover properly, and build confidence that your race plan will work when the pressure rises.

For serious endurance athletes, fuelling is not an optional extra to sort out a week before race day. It is part of training. The same way you condition your aerobic system, practise pacing and develop durability, you need to train your gut, establish reliable routines and understand what your body needs across different conditions.

Long run fuelling strategies start with the session goal

Before calculating grams of carbohydrate or deciding how many gels to carry, identify the purpose of the run. An easy 75-minute aerobic run does not require the same intake as a 2.5-hour long run with race-pace intervals in the second half.

If the session is short and genuinely easy, arriving well-fed may be enough. Once duration extends beyond 90 minutes, or the session includes sustained quality, carbohydrate intake during the run becomes increasingly useful. It protects the quality of the work, reduces the risk of an unnecessary energy collapse and supports a better recovery outcome afterwards.

This is not an argument for taking in maximum fuel on every run. Over-fuelling a low-demand session can be uncomfortable and impractical. Under-fuelling key long sessions, however, is a common mistake among athletes who train hard but struggle to convert that work into consistent race performance.

Set a carbohydrate target you can execute

For most long-run sessions, a practical starting range is 30 to 60 grams of carbohydrate per hour. This suits many athletes running for around 90 minutes to three hours at an aerobic or moderate effort.

For marathon preparation, long-course triathlon training and demanding sessions lasting more than 2.5 hours, 60 to 90 grams per hour is often more appropriate. Athletes racing for longer periods may benefit from higher intakes, but only when they have systematically trained their gut and use a mix of carbohydrate sources that the body can absorb efficiently.

The important point is to start at a level you tolerate, then build. If you currently take one gel every 45 minutes, jumping immediately to 90 grams per hour may create more problems than it solves. Begin with a clear target, such as 40 grams per hour, and increase gradually across several long runs.

Do the maths before leaving home. A standard gel may provide 20 to 25 grams of carbohydrate, while a sports drink, chews or other race-legal products can add more. Vague plans such as “I will have a gel when I feel flat” usually lead to late fuelling, inconsistent intake and a poor assessment of what actually worked.

Fuel early, not when the wheels come off

Carbohydrate taken during a long run is most effective when it is started early and consumed consistently. Waiting until you feel depleted is reactive. By that stage, it can be difficult to restore energy availability quickly enough to rescue the session.

For a typical long run of two hours or more, take the first fuel within the first 20 to 30 minutes, then continue at planned intervals. Smaller, regular doses are generally easier on the stomach than a large intake taken all at once.

This matters even more when pace rises. At marathon pace, threshold effort or late-race intensity, the body relies more heavily on carbohydrate. If your key session includes a strong finish, race-pace block or hills late in the run, your fuelling plan needs to support that work before it begins.

Train the gut with the same discipline as the legs

Your gut is trainable. Regularly consuming carbohydrate while running can improve comfort, absorption and confidence. This is why long training runs are the right place to practise race fuelling, not simply a test of how little you can get away with.

Use the products, concentrations and timing you expect to use in competition. Change one variable at a time. If you trial a new gel, a stronger drink mix, caffeine and a different breakfast all in the same session, you will not know what caused a problem if your stomach turns.

Gut issues can also reflect pacing, heat stress and dehydration rather than the product itself. A gel that works well at easy effort may be difficult to tolerate when you are running too hard in humid conditions. The solution is not always a different gel. Sometimes it is a better pace decision or more disciplined fluid intake.

Match fluids and sodium to Australian conditions

Australian athletes need to respect the effect of heat and humidity. A fuelling plan that works on a cool winter morning in Melbourne may be inadequate during a warm, humid long run in Brisbane, or on an exposed summer course elsewhere in the country.

Drink to a considered plan, guided by thirst, session duration, conditions and your individual sweat rate. There is no universal hourly fluid target. Some athletes lose considerably more fluid and sodium than others, and forcing excessive water can be as problematic as drinking too little.

For longer sessions, especially in warm conditions, a sports drink or electrolyte source can help replace sodium lost through sweat while contributing carbohydrate. Salty clothing, stinging eyes and large body-mass losses across similar sessions may indicate that sodium deserves closer attention. A sweat-rate assessment can provide useful individual data, but it should inform a practical plan rather than create false precision.

Plan the route around access to water if needed. Carry bottles, use aid stations in race simulations, or arrange a drop bottle. Do not let a convenient route dictate a poor fuelling plan.

The meal before the run still matters

During-run fuel cannot fully compensate for starting a major session under-fuelled. For long runs, aim to begin with carbohydrate stores reasonably topped up. A familiar pre-run meal containing carbohydrate, eaten with enough time to settle, gives you a stronger foundation.

The exact meal depends on your start time, appetite and tolerance. Toast, oats, rice, cereal, banana or a sports drink can all have a place. Keep fibre, fat and unfamiliar foods in check before key sessions if they tend to upset your stomach.

Early starts create a practical challenge. If a substantial breakfast is not comfortable before a dawn run, consider a smaller carbohydrate snack before leaving and begin fuelling early during the session. What matters is the total plan, not forcing a textbook breakfast that does not suit you.

Use low-fuel training carefully

Occasionally training with lower carbohydrate availability can be used for a specific adaptation goal. But it is frequently misapplied. Turning every long run into a fasted or under-fuelled challenge can compromise session quality, increase recovery demands and teach you to associate long running with survival rather than controlled performance.

There may be a place for low-intensity, lower-fuel work within a structured programme. It should be deliberate, appropriately timed and not used before sessions that require quality. Athletes with high workloads, demanding jobs or limited recovery capacity generally have less room for aggressive fuelling restriction.

The key question is simple: what adaptation is this session meant to deliver? If the answer is endurance at race-relevant pace, fuel it accordingly.

Rehearse the race plan, including caffeine

Your most race-specific long runs should include a full rehearsal of your intended nutrition plan. Practise carrying fuel, opening packets at pace, drinking from the bottles you will use and managing intake through fatigue. For triathletes, rehearse the handover from bike nutrition to run nutrition rather than treating the run as a separate event.

Caffeine can improve performance for some athletes, but it is not compulsory and it is not risk-free. Test the dose, timing and product in training. Consider its effect on your stomach, sleep, anxiety and pacing judgement, particularly for early-morning events or longer races.

Keep a brief record after key long runs: duration, conditions, carbohydrate per hour, fluids, sodium source, stomach comfort and how you finished. Patterns become clear quickly. You may find that 50 grams per hour is excellent in cool weather but insufficient in a three-hour race simulation, or that one particular product fails only when combined with concentrated drink mix.

At Gene Convery Endurance Academy, the aim is not to make fuelling complicated. It is to make it repeatable. Build a plan that matches the demands of your event, practise it under realistic conditions and refine it with evidence from your own training. The best strategy is the one you can execute calmly when the race gets hard.