Endurance Fueling for Triathletes: Gels, Sports Drinks and Electrolytes

An energy gel, an electrolyte packet and a scoop of creatine can all fit in a jersey pocket. Only one of those names tells you that the product is meant to deliver carbohydrate during a race. If you are choosing supplies for a multi-hour triathlon, start with three numbers: grams of carbohydrate, milligrams of sodium and the amount of fluid you will actually drink. The numbers on an unopened packet only count once you consume it.

Two brands worth comparing are Maurten and Precision Fuel & Hydration. Each makes measured carbohydrate products, but even within one brand a gel and a drink can serve different purposes. Below are specific label examples, a worked two-hour ride and ways to adapt what you carry between the bike and the run. These are tools for planning and practice, not a personal prescription.

Endurance fueling brands and formats compared

Maurten Gel 100 and Drink Mix 160

One standard Gel 100 delivers 25 grams of carbohydrate. The 100 in its name does not mean 100 grams. Drink Mix 160 supplies 40 grams per sachet. That distinction matters if you have counted your whole ride in “servings” without noticing that a serving of one product is larger than a serving of another. A gel is easy to count individually. A drink is easy to sip, but its contribution depends on how much of the prepared bottle you finish. Check the exact variant if you also track caffeine. See the Maurten Gel 100 label.

Precision Fuel & Hydration PF 30 Gel and Carb & Electrolyte Drink Mix

The original PF 30 Gel supplies 30 grams of carbohydrate per packet. Two original gels therefore supply 60 grams. Precision also makes a combined drink mix. Its published event specification lists 60 grams of carbohydrate and 1,000 milligrams of sodium per liter at the stated concentration. Half a liter of that prepared drink supplies half of each amount. The regular PF 30 and its caffeinated sibling have similar names, so read the packet when buying an assortment. PF 30 product label and Precision drink-mix specification.

Which format fits your event?

Choose gels or chews if you want to count carbohydrate independently of your water bottle. A combined drink can simplify a ride with reliable bottle access. A low-carbohydrate mineral drink can pair with food or gels when you want to adjust fluid and fuel separately. The last option requires carrying a source of carbohydrate. A bottle can taste sweet or salty and still provide very little energy. Check the total carbohydrate line rather than estimating from the flavor.

A useful test when comparing brands is whether you can explain one hour of your plan without using a brand name. For example, “one packet supplies 25 grams, and the part of my bottle I expect to drink supplies another 20.” Once that is clear, you can shop among products that fit the same job. There is no reason the gel and the bottle must come from the same company.

How much carbohydrate do endurance athletes use?

Duration changes the answer. The Australian Institute of Sport lists 30–60 grams per hour for endurance exercise lasting roughly one to two and a half hours. For events beyond about two and a half to three hours, its guidance goes up to 90 grams per hour for athletes who can tolerate that intake. It also distinguishes short exercise from sustained, high-intensity efforts. Those ranges describe different demands. They are not a sequence everyone should work through or an instruction to consume more at every session. Read the AIS guidance by event duration.

Start with the kind of effort ahead. A familiar easy loop with a meal waiting at home is a different outing from a race-pace brick where the run starts two hours after you last ate. Ask how long you expect to be moving, where you can safely eat or drink, and what has worked at similar intensity. A sports dietitian can help translate the published ranges into an individual plan, particularly if you have repeated stomach problems, a medical condition or a demanding race calendar.

A two-hour bike example

Suppose a rider has successfully practiced taking 45 grams of carbohydrate per hour and is planning a two-hour ride. That makes 90 grams for the ride. Two standard Maurten Gel 100 packets supply 50 grams in total. A bottle prepared with one Drink Mix 160 sachet contributes 40 grams if the rider finishes it. Together those items account for the planned 90 grams. This example illustrates the arithmetic. The bottle volume and the rider’s fluid needs still need their own plan.

Now imagine that half the bottle returns home. The rider consumed 50 grams from the gels and 20 from the drink, or 70 grams over two hours. That is 35 grams per hour. The rider can use that information when planning the next training session. Perhaps cold weather made drinking less appealing, or perhaps the bottle cage was hard to reach. The fix may be easier access to a solid or gel, rather than a stronger mix or a reminder to force down more liquid.

Count chews and servings carefully

A packet of chews can contain multiple pieces and more than one serving. Read “per piece,” “per serving” and “per package” literally. If you know that two pieces supply 30 grams and you ate one piece, record 15 grams. Write the calculation on your training note once. You can then make decisions on the bike without trying to read small type through sunglasses.

How to plan fluids and electrolytes separately

Look for milligrams of sodium per serving and the intended dilution. A figure given per liter describes a concentration. A figure given per packet describes what is in the packet. Those figures match only if the packet is intended for one liter and you drink that whole liter. Adding extra water changes the concentration but does not change the total sodium you put in the bottle. Leaving some drink behind changes the amount you actually consume.

Consider two similar training rides. On a cool morning you may drink less than on a hot afternoon. If the entire carbohydrate plan is in the bottle, drinking less also means consuming less fuel. Keeping some fuel in a separate form gives you a way to adjust one part of the plan without changing the other. Conversely, if you want more fluid on a hot day, an extra bottle of water lets you respond without automatically taking a second full serving of every ingredient.

Both too little fluid and excessive drinking can be harmful. Sweat loss, weather, pace, access to drinks and individual tolerance vary. Adding sodium does not make it safe to drink unlimited amounts. If you have a prescribed fluid or sodium restriction, get an individual plan from your care team. For an event in unusually hot conditions or a first long race, discuss preparation with a sports dietitian or athletic trainer who knows the event. National Athletic Trainers’ Association guidance on fluid replacement.

A mineral concentrate can be useful to compare by its ingredients. For example, BodyBio E-Lyte lists sodium, potassium and magnesium and is diluted in water. It is a different purchase from a carbohydrate drink mix. If your main need is race fuel, choose the carbohydrate source first. If you already carry gels and want to compare mineral formats, the electrolyte collection shows liquids and capsules with their individual labels.

If you prefer a tablet, Electrolyte SR from Endurance Products is another format to compare. Check the mineral amounts and directions on its own label when deciding what else to carry. This is an affiliate link. Radical Creative Wellness may earn a commission if you buy through it.

Build a plan for the swim, bike and run

Start with the course map

Mark the expected length of each leg, where the first bike aid station appears and what is available on the run. A station offering water is a different resupply point from one offering a particular sports drink. Organizers may change sponsors, products or station locations between editions of a race. Check this year’s athlete guide. If it only names a brand, ask which formula and flavor will be on the course before basing the plan on it.

Practice the transition

The swim creates a stretch where ordinary eating and drinking are impractical. Think through what will be available afterward and what you can handle when you first get on the bike. A wrapper that opens easily in the kitchen can be awkward with wet hands. Try the actual packet, bottle cage and storage pouch during training. Pick a safe place to access them. Handling a gel in traffic or on a technical descent is a poor way to test a new skill.

A run after a long ride can feel quite different from a standalone run. A bulky snack that works on a relaxed bike ride may be unappealing at running pace. Rehearse the transition with whatever you will actually carry on foot. If the run aid stations serve small cups, practice drinking from a cup. Notice what you manage to swallow and what spills. The volume printed on a bottle from training tells you little about a half-filled cup on race day.

Review what happened, not just what you packed

After practice, write down the elapsed time, approximate weather, what you brought, what came home and when any problem started. Include details that have nothing to do with nutrition. A late start, a harder climb or a missed chance to reach the bottle can explain a big difference between the plan and the session. Change one manageable thing on the next comparable outing so you can tell whether it helped.

Make a fallback plan for a dropped bottle or an unfamiliar aid-station product. This need not mean carrying double everything. It might mean knowing where plain water is available and carrying one familiar gel you can reach without stopping. If you cannot safely meet your needs or begin to feel unwell, slow down or stop and use event support. A missed feeding is not a reason to take several servings at once.

Where protein powders and creatine fit

Protein powder answers a different question: can you conveniently include protein in meals or snacks around training? If you can eat a familiar meal after a ride, a shake may offer little practical advantage. If you have a long journey home, it may be a convenient option. Check the protein and carbohydrate separately. A powder with plenty of protein can still contribute very little carbohydrate to the next ride.

Creatine is usually considered in the context of strength training or repeated short bursts of intense exercise. That evidence does not make it a substitute for carbohydrate during a long event. An endurance athlete who also trains in the gym can make those buying decisions separately. NIH Office of Dietary Supplements review of exercise supplements.

For a concrete example, LVLUP Crevolution lists creatine HCl, creatine monohydrate, GAA, betaine and 3 grams of cluster dextrin per 10-gram scoop. The scoop weight is the weight of the whole blend. Calling it ten grams of carbohydrate would overstate its role in a race plan. Compare creatine formulas by their ingredients and serving size if that is the purchase you are making.

Common questions about endurance supplements and race fueling

Are gels better than sports drinks for triathlon?

Either can work. Gels are useful when water availability changes because you can count each packet separately. A drink may be easier to use when you have consistent bottle access and already know how much of it you tend to finish. Practice with the same concentration, packet size and equipment you will use in the event.

Do zero-sugar electrolytes provide energy on a long ride?

Read total carbohydrate per serving. If it is zero, the drink contributes zero grams toward a carbohydrate plan. You can pair it with food, chews or gels, or use a carbohydrate-containing sports drink instead. A sugar-free label alone does not tell you the total carbohydrate in every formula.

Can I use ordinary food instead of buying energy gels?

Yes. The AIS includes everyday foods among possible carbohydrate sources. Look for something you can carry, unwrap, chew and tolerate at the intended pace. A familiar food that works halfway through a leisurely ride may be difficult on a fast run. Use your own longer sessions to test that practical difference.

What if I tolerate a product on the bike but not on the run?

Record the amount, texture, fluid and timing along with your pace. You might try a smaller, easier-to-carry format or move the next trial to a similar bike-to-run session. Persistent nausea, pain or repeated vomiting warrants advice from a clinician or sports dietitian rather than experimenting with more products.

Should every gel contain caffeine?

Caffeine is optional. Standard and caffeinated versions sometimes share similar packaging. Check the milligrams on each packet and count other sources you use that day. If you prefer to avoid caffeine, buy the exact original version and separate the packets before packing. A caffeinated product is a poor surprise to discover midway through an evening training session.

How can I compare price when packets have different amounts of carbohydrate?

Compare cost per amount you would actually use. For example, divide the package price by its total grams of carbohydrate and multiply by 30 to compare the cost of 30 grams. Then consider waste, carrying space and tolerance. The least expensive option per gram may still be inconvenient if you routinely leave half a bottle unfinished.

Can I use the same electrolyte product during a fast and during a race?

The goals differ. A powder chosen to avoid calories during a personal eating window may supply none of the carbohydrate you want during prolonged exercise. For medical fasting the instructions come from the care team. Our guide to electrolytes for fasting explains how to read that label for a different purpose.