Aid stations are where races are lost in slow motion. Not in dramatic blow-ups, but in 45-second pauses multiplied across 20 stops — time that evaporates while you fumble with a gel, refill a bottle with both hands, or wait for a volunteer to find your drop bag. In a sport where athletes spend months shaving seconds off interval pace, it is remarkable how rarely aid station technique gets the same deliberate attention.
The math is unforgiving. At a 50-mile ultramarathon with 22 aid stations, the difference between a 30-second stop and a 90-second stop — without any change in fitness — is 22 minutes. That gap represents months of training for most athletes. Elite ultrarunners consistently execute sub-20-second aid station passes when not sitting at a drop bag; the gap between them and recreational competitors at aid stations is often larger than the gap in raw fitness.
The Time Cost of Poor Aid Station Technique
A 2021 analysis of finisher GPS data from a major 100-mile race found that the bottom quartile of finishers spent an average of 73 seconds per manned aid station stop, compared to 24 seconds for the top quartile — a 49-second per-stop difference. Over 28 aid stations in the race, that was 22.9 minutes of cumulative time loss with no aerobic benefit. The data was consistent across all finisher times, suggesting the gap is skill-based rather than fitness-based.
Common time sinks at aid stations include: searching for specific foods or fluids rather than knowing in advance what is stocked; refilling soft flasks with both hands while standing still; attempting to eat solid food that requires slowing to a walk when running through was possible; losing 15–20 seconds to nausea or GI distress caused by poor food choices made in the moment; and underestimating how long crew interactions take. Each of these is fully addressable with preparation. None require you to be fitter.
Grab-and-Go vs Walk-Through Strategy
The fundamental aid station decision is: run through, walk through, or stop. The decision tree should be made in advance, not on the day. Run-through is appropriate when you need only a single item (one cup of fluid, one gel handed by a volunteer) and your current nutrition and hydration status are on target. Walk-through is appropriate when you need to eat something solid, refill a flask, or communicate with crew — walking gives you 15–20 seconds of eating/drinking time without a full stop. A full stop is reserved for drop bag access, medical attention, or addressing a significant problem (blister, chafing, lighting change).
Preplan every aid station in your race brief. For a 50-mile race, you should know at each aid station: am I running through, walking through, or stopping? What am I taking? Do I have a drop bag here? A written plan (on your phone, in your vest pocket, or memorized for the key stations) removes the cognitive load during the race itself. Cognitive load at mile 60 is real — anything pre-decided is a free performance gain.
Cup Pinching and Fluid Intake Technique
Drinking from a paper cup while running is a learnable skill that most athletes never practise. The standard technique: as you take the cup, immediately pinch the rim to form a narrow spout, tilting the open end toward your mouth. This prevents the fluid from sloshing out and allows you to drink at a near-running pace. Without this technique, most athletes inhale water, spill the majority of the cup, or are forced to slow to a walk to avoid choking — adding 8–12 seconds per fluid stop.
At elite road marathon level, the bottle handoff from a moving table involves placing the hand palm-down over the top of the cup at the moment of contact, which immediately controls the container. In ultras, soft flask refilling is fastest when done by a crew member or volunteer — which means briefing them in advance on your flask valve type and preferred fill level. A 500 ml soft flask refilled by a practised volunteer takes 8–10 seconds; refilled by an untrained volunteer or yourself unfamiliar with the flask design takes 25–40 seconds. Volunteer briefing is part of aid station execution.
What to Carry vs What to Grab
The carry-vs-grab decision is fundamentally about reliability and specificity. Carry anything that has to be a specific product at a specific dose: your tested gels, electrolyte capsules you have verified your gut tolerates, a medication, or food items not stocked at aid stations. Grab anything generic that you are comfortable improvising: water, Coke, broth, banana halves, boiled potatoes. Never rely on aid stations to stock a specific product you have not confirmed in advance — aid station nutrition varies by event and even by year within the same event.
Soft flask strategy for long ultras: carry 500 ml minimum as your personal supply, more in remote sections between aid stations. Carry enough fuel (gels or chews) to cover the longest gap between aid stations plus a 20% buffer. This protects against aid station shortages, slower-than-expected pace extending time between stops, and GI distress that forces you off aid station food. The carrying cost of an extra 100g is negligible over an ultra; the cost of bonking in a remote section is race-ending.
Drop Bag Optimization for Ultras
Drop bags should be organized so that what you need first is visible on top — in the dark, with cold hands, at mile 70. Use clear zip-lock bags within the drop bag, each labelled (e.g., "FEET," "NUTRITION TOP-UP," "COLD WEATHER LAYER"). Colour coding by function works reliably when labels become hard to read. Include a written instruction card in each drop bag as a checklist: "1. Swap socks. 2. Add 4 gels to vest. 3. Take salt tabs. 4. Fill both flasks." This compensates for cognitive decline in the latter stages of very long events.
Common drop bag mistakes: packing everything rather than editing ruthlessly (searching through an overfull bag costs 2–3 minutes), using bags that look identical to other athletes' bags (use distinctive colours or tags), and not accounting for weather changes (include a lightweight rain shell even if the forecast is clear — drop bag gear cannot be used if you did not pack it). Your most comprehensive drop bag should be at the 60–70% point of the race, where decisions are hardest and gear needs are often greatest.
Practising Aid Station Skills in Training
Aid station rehearsal is low-cost and high-yield. Designate one long run per month as an aid station drill run: set up a small table with cups of fluid, practise the cup-pinch technique at running pace, and rehearse eating a solid food while maintaining a fast walk. For your target race, run the final 10 km of at least two long runs with your race vest packed exactly as it will be on race day — this exposes fit problems, chafing points, and access issues before they cost you time or comfort during the event.
Crew and pacer briefing is part of training, not an afterthought. Conduct a 20-minute briefing with your crew at least 2 weeks before a major ultra, covering: flask refill procedure, what you will eat at each crewed station, the signal you will use if you need medical help vs just a slow patch, and their job during a full stop (crew works while you rest, not vice versa). Crews who know their role can reduce a drop bag stop from 4 minutes to 90 seconds — a gap that reflects preparation, not luck.
Efficient fuelling through aid stations starts with knowing your per-hour nutrition needs before the race. The NorthLine Race Day Nutrition Planner helps you calculate exactly what to carry, what to grab, and when — so every aid station pass is a deliberate execution rather than a guess.