Why Ultra Runners With Diabetes Need a Specialized Emergency Kit

Ultra marathons—races of 50 kilometers, 100 kilometers, or even longer—push the human body to extremes. For runners who manage diabetes, these events introduce an extra layer of complexity. Blood glucose levels can swing unpredictably during sustained exertion due to fuel depletion, stress hormones, hydration imbalances, and erratic gastrointestinal absorption. A generic first-aid kit will not address the specific risks of hypoglycemia or hyperglycemia. Building a tailored emergency kit is not optional; it is a non-negotiable part of race preparation that can prevent a medical crisis and keep you running safely.

This article expands on the core elements of a diabetes-focused emergency kit for ultra races, providing actionable guidance for every stage—from pre-race planning to on-course management. Whether you use insulin pumps, multiple daily injections, or oral medications, the principles here can be adapted to your individual physiology and race conditions.

Understanding the Metabolic Demands of Ultra Running With Diabetes

Why Blood Glucose Behaves Differently in Ultrarunning

During shorter races, glucose levels often rise from an adrenaline surge and then settle with fuel intake. In an ultra, the picture is more volatile. Skeletal muscles consume glucose at a high rate for hours, which can lead to rapid drops. At the same time, cortisol and epinephrine released during intense effort can trigger glucose release from the liver, causing unexpected spikes. Weather, altitude, and sleep deprivation also influence insulin sensitivity. A kit designed for these dynamics includes supplies that address both directions of glucose movement.

Hypoglycemia vs. Hyperglycemia: Recognizing the Signs

Knowing how your body signals trouble is essential, but fatigue, nausea, and confusion can mimic both conditions. Your kit should contain tools that give you objective data, such as a blood glucose meter or a continuous glucose monitor (CGM), along with backup supplies if technology fails. Never rely solely on symptoms. Include a written protocol in your kit that reminds you of your personal thresholds: for example, “Below 70 mg/dL: take 15 grams fast-acting glucose and recheck in 15 minutes.”

Core Components of a Diabetes Emergency Kit for Ultras

Below is an expanded list of what to pack. Consider this a starting point; add or remove items based on your experience and the specific race profile (distance, terrain, aid station frequency, climate).

Fast-Acting Glucose

  • Glucose tablets or gels—premeasured and easy to digest. Aim for at least four servings (each about 15 g).
  • Hard candies or jelly beans—chewable options that work if gels become unpalatable in cold or heat.
  • Sports drink concentrate—a small bottle of concentrated carbohydrate drink to carry in a waist pouch.
  • Glucose powder sachets—can be mixed with water if you need a liquid source quickly.

Insulin and Insulin Supplies

  • Extra rapid-acting insulin—store in an insulated case (Frio or similar) to protect from extreme heat.
  • Backup syringes or pen needles—in case your pump fails or you need a correction dose.
  • Spare pump infusion set and reservoir—if you use a pump, pack at least one complete backup set.
  • Insulin pen with a fresh needle—even if you primarily use a pump, a pen provides a low-tech alternative for emergencies.

Glucose Monitoring Equipment

  • Blood glucose meter with extra batteries and test strips—at least 20 strips for a long race, plus a small sharps container.
  • Continuous glucose monitor (CGM) sensor and transmitter—carry a spare sensor and adhesive patches (e.g., Skin Tac or overtape) to prevent dislodging.
  • Lancing device with extra lancets—self-contained and easy to use with one hand.
  • Ketone test strips—to check for diabetic ketoacidosis if glucose remains elevated despite insulin.

Medical Identification and Documentation

  • Medical ID bracelet or necklace—engraved with “Type 1 Diabetes” or “Type 2 Diabetes on Insulin” plus an emergency contact number.
  • Laminated card—listing your diagnosis, medications, allergies, and a brief treatment plan for hypoglycemia (including glucagon instructions).
  • Race emergency contact form—some ultras require you to register medical conditions; have a copy in your drop bag.

Hydration and Electrolytes

  • Electrolyte tablets or powder—to mix in water and maintain sodium balance, which affects insulin absorption and hydration status.
  • Plain water & sports drink—carry both; plain water helps when you need to dilute a high glucose level, while sports drink provides glucose and electrolytes simultaneously.
  • Hydration bladder or bottles with measurement marks—so you can track fluid intake accurately.

First Aid and Personal Medications

  • Glucagon emergency kit—for severe hypoglycemia when you cannot swallow. Ensure your crew or race medical team knows where it is and how to use it.
  • Antiseptic wipes and bandages—for cleaning injection sites or pump insertion areas that become irritated.
  • Anti-nausea medication—nausea can mimic hypoglycemia and limit your ability to take oral glucose.
  • Sunscreen and lip balm—skin protection is especially important for insulin delivery sites and CGM sensor sites.

Customizing Your Kit for Race Specifics

Distance and Aid Station Frequency

For a 50K with aid stations every 5 miles, you can carry a smaller kit and rely on crew or aid stations for resupply. For a 100-miler with remote sections, carry enough supplies for at least double the expected time between stations. Always plan for a worst-case scenario: a delayed support vehicle, a closed aid station, or a weather event that extends your time on course.

Climate and Terrain

  • Heat: Insulin degrades above 86°F (30°C). Use an insulated pouch with a cooling pack (not frozen, to avoid freezing insulin). Keep your meter and CGM away from direct sunlight.
  • Cold: Insulin can freeze below 32°F (0°C). Store it in an inner jacket pocket. Finger-pricking may be difficult with numb hands; pre-warm the lancing site.
  • High humidity: CGM adhesive can fail. Carry extra overtape and adhesive remover wipes.
  • Altitude: Some meters and CGMs lose accuracy above 10,000 feet. Verify with the manufacturer and bring a backup meter that is altitude-rated.

Your Personal Insulin Sensitivity

Ultras can increase insulin sensitivity for hours or days after the race, but during the event, intense effort often reduces insulin needs. Track patterns from your training runs: if you normally require 50% less basal insulin during a 6-hour run, apply that to the race, but monitor closely. Include written basal rate adjustments for pump users or long-acting insulin dose reductions in your kit.

Pre-Race Preparation and Testing

Simulate Race Conditions During Training

Run at least two long training sessions (back-to-back long runs for multi-day events) while wearing the exact gear you plan to use in the race. Test each component of your emergency kit: open glucose tablets, activate your backup meter, try the glucagon trainer (not the real drug). Practice treating a simulated low while moving—can you open a gel pouch with one hand while maintaining balance on trail? The more you rehearse, the more automatic the response becomes.

Communicate With Your Healthcare Team

Share your race plan with your endocrinologist or diabetes educator. They can help you refine insulin dosing strategies and prescribe extra supplies (like a backup glucagon). Ask for a written letter that explains your condition and the need for medical supplies at security checkpoints or race bag drops.

Check Race Policies on Medical Supplies

Review the race organizer’s medical policy. Some ultras allow participants to carry needles and lancets only if they are in a labeled container. Others prohibit self-administered injections at aid stations due to local regulations. Contact the race medical director if you have specific questions; they often appreciate proactive communication from participants with diabetes.

Organizing and Packing Your Kit

Use a Dedicated, Labeled Container

A waterproof, brightly colored pouch (e.g., bright orange or yellow) makes your emergency kit easy to find inside a drop bag. Attach a laminated checklist to the outside so you can quickly inventory supplies at each aid station. Store insulin and glucagon in a separate insulated pouch but keep all items together in one main kit.

Distribute Copies Across Drop Bags

For ultras with multiple drop bag locations, place a smaller version of your emergency kit in each bag. Even if you miss one bag or it gets delayed, you have backup supplies. At the same time, carry a minimal kit on your person: a waist belt with a backup meter, a few glucose tablets, a small container of test strips, and a medical ID card.

Create a Quick-Reference Sheet

Include a laminated card with your personal diabetes management protocol. Write step-by-step actions for these scenarios:

  • Suspected low (glucose below 80): Stop running, test, consume 15 g fast-acting glucose, wait 15 minutes, retest.
  • Suspected high (glucose above 250): Check ketones, administer correction insulin if ketones negative, hydrate with water, do not exercise until glucose trends downward.
  • CGM alarm during race: Trust the alarm but confirm with a fingerstick. Adjust insulin or carbohydrate intake accordingly.

On-Course Strategy: Using Your Kit in Real Time

Monitor Proactively, Not Reactively

Set your CGM alarms to alert you at a broader range than normal (e.g., 85–200 mg/dL) so you catch trends early. Test with your meter at every aid station and whenever you feel off. Write down each reading in a small waterproof logbook or a note on your phone to identify patterns.

Fueling Around Your Insulin

Coordinate your carbohydrate intake with your insulin activity. If you reduce basal insulin, you can rely on slow-release carbs (e.g., energy bars, trail mix) and supplement with fast-acting glucose only when needed. Do not force carbs if your glucose is already high; instead, drink water and check ketones. Keep all snacks and glucose sources in an easily accessible pocket—fumbling for a gel in your drop bag wastes time and increases risk.

Communicate With Crew and Race Medical Staff

Brief your crew (if allowed) on how to assist: they should know where your emergency kit is, how to test your blood glucose, and how to administer glucagon if you become unconscious. Mark your drop bags with a small but visible ribbon or tag so medical staff can identify them quickly. If you feel a severe low coming on, stop and signal for help—do not push through.

Scenario Planning: What Could Go Wrong?

Lost or Damaged Supplies

Trail running can be rough on gear. A fall could shatter a glucose meter screen, or rain could soak a pouch of test strips. Plan for this by carrying a backup meter (even a cheap one) in a separate Ziploc bag inside your main kit. Also pack a small USB battery pack for recharging devices if your CGM uses a rechargeable transmitter.

Unexpected Hypoglycemia Near the Finish

The adrenaline of crossing the finish line can cause a rapid drop in glucose as stress hormones fade. Many runners experience post-race hypoglycemia. Keep your emergency kit accessible even after you stop moving. Have a recovery snack ready (e.g., a protein shake with carbs) and monitor glucose for at least an hour after finishing.

Insulin Pump Failure

If your pump fails mid-race, you still have basal and bolus options. Use your backup syringes or pen to give rapid-acting insulin every few hours (based on your basal rate). If you cannot calculate the dose, revert to your written protocol: e.g., “Take 2 units every 4 hours if not eating.” Contact race medical or your endocrinologist if needed.

Mental Preparation and Confidence

An emergency kit is only as effective as the runner who uses it. Anxiety about diabetes can interfere with decision-making. To build confidence, practice the full kit check—opening, inspecting, and repacking—until it takes less than two minutes. Envision each scenario (low, high, failed device) and rehearse your response. The more automatic your reaction, the faster you return to running.

Many elite ultra runners with diabetes have completed 100-milers and even multi-stage races. Their success comes from meticulous planning, not luck. Your emergency kit is a tool that empowers you to focus on the trail instead of worrying about your blood sugar.

Conclusion

Creating a custom emergency kit for ultra races when you have diabetes requires more than just tossing in glucose tablets. It demands a complete assessment of your unique physiology, the race environment, and every link in the chain from monitoring to treatment. Start building your kit weeks before the event. Test it under real conditions. Share it with your support network. With a well-stocked kit and a solid plan, you can tackle any ultra with the confidence that you are prepared for the unexpected.

For further guidance, consult resources such as the American Diabetes Association’s exercise guidelines, the Ultrarunning Magazine article on diabetic ultra runners, and the NIH review of exercise management in type 1 diabetes. Always consult your healthcare provider before making changes to your diabetes management plan.