Energy Drinks vs Gels vs Chews vs Bars: Choosing the Right Fuel Format
Stand in front of a nutrition shelf before a long session and the choice is bewildering: sports drink, gel, chew or bar, all promising roughly the same thing — carbohydrate, quickly, without wrecking your stomach. The marketing rarely explains why one format suits a hard interval session and another suits a six-hour sportive, so most people end up choosing on flavour or habit rather than physiology.
The honest answer is that energy drinks vs gels vs chews vs bars isn't really a contest with one winner. Each format solves a slightly different problem — how fast the carbohydrate reaches your bloodstream, how much water it needs alongside it, and how much chewing and swallowing effort it demands while you're working hard. Once you understand those trade-offs, picking the right one for a given session stops being guesswork.
Energy Drinks vs Gels vs Chews: How Fast Do They Actually Digest?
Sports drinks are typically mixed to a 6–8% carbohydrate concentration — anything stronger tends to sit heavy and slow gastric emptying, anything weaker and you're drinking a lot of fluid for not much fuel. A 750ml bottle at 7% gives you roughly 50g of carbohydrate, delivered alongside the fluid and electrolytes you need anyway, which makes it the most efficient format per gram of effort. The catch is you have to drink enough of it, and in hot conditions or hard efforts your fluid needs and your carb needs don't always line up.
Gels sit at the other end of the concentration scale. A standard 30–40g sachet is often 60–70% carbohydrate, meaning you get 22–27g in a couple of swallows with almost no chewing required. That concentration is exactly why gels can cause gut distress if you don't take them with water — the osmotic load pulls fluid into the gut rather than out of it. Chews and pastilles land in between: a serving delivering 24–30g of carbohydrate takes longer to break down because you're chewing and mixing it with saliva first, which slows the rate of glucose delivery slightly but tends to sit far more comfortably, especially over three-plus hours when gel fatigue sets in.
Bars: The Format Everyone Underestimates
Bars are the format most athletes either love or ignore completely, and both reactions are usually about timing rather than the product itself. A typical energy bar carries 30–45g of carbohydrate, but it also brings fat, fibre and sometimes protein, all of which slow gastric emptying. That's a genuine advantage on a steady four-hour ride at 60–65% of FTP, where you want sustained energy and can afford the slower release. It's a liability in the last 90 minutes of a hard race, when blood is being diverted away from the gut and a dense, fibrous bar can sit like a stone.
The rule of thumb that works well in practice: bars and real food (flapjack, malt loaf, bananas) for the steady, lower-intensity hours, and gels or chews for the harder efforts and the closing stages, when digestion slows and simplicity matters more. Ultra-distance and multi-day events are the exception — there, real food and bars become essential simply because you can't sustain 90g of carbohydrate an hour from gels and chews alone for twelve or more hours without your palate and gut rebelling.
Matching Fuel Format to Effort and Duration
Under 60–75 minutes, most trained athletes don't need exogenous carbohydrate at all — a mouth rinse with a carb solution can offer a small central nervous system boost, but digestion isn't really the limiting factor yet. Between 90 minutes and three hours, the target most research and coaching guidance settles on is 30–60g of carbohydrate per hour, and this is where drinks and chews both work well; a bottle of sports drink plus a few chews between aid stations covers it without overcomplicating things.
Beyond three hours, particularly at higher intensities, the current evidence supports pushing towards 80–90g of carbohydrate per hour using a mix of glucose and fructose (commonly close to a 1:0.8 ratio) because the two sugars use separate gut transporters — SGLT1 for glucose, GLUT5 for fructose — and combining them raises the ceiling on how much your gut can absorb per hour compared with glucose alone. This is exactly why rotating between energy drinks, gels, chews and the occasional bar isn't just about variety for its own sake: it spreads the carbohydrate load across formats so you hit your hourly number without leaning on one product until you can't face the taste of it any more (a real phenomenon known as flavour fatigue).
Gut Training and Practical Rules That Actually Help
Whichever combination you land on, your gut has to be trained to handle it, the same way your legs are trained to handle pace. Athletes who only fuel occasionally in training and then attempt 80–90g an hour on race day are the ones who end up walking the last 10k with cramping and nausea. Practise your race-day fuelling strategy in training sessions of similar length and intensity, build up the carbohydrate dose gradually over four to six weeks, and always test a new product on a training day, never for the first time on race morning.
It's also worth separating hydration from fuelling in your head, even though drinks blur the line. If you're relying on a strong sports drink for all your fluid, you may end up under-drinking relative to sweat losses in the heat, or over-consuming carbohydrate relative to what your gut can process. Many experienced cyclists and runners now run plain water or a weak electrolyte mix in bottles and take their carbohydrate separately via gels or chews — it gives you independent control over fluid and fuel rather than being locked into whatever ratio is in the bottle.
What We Use at FTP Endurance Fuel
We built our own fuelling around chews rather than gels for a simple reason: on long days in the saddle or on the trail, having something that takes a moment to chew slows you down just enough to fuel deliberately, rather than gulping a gel and forgetting to drink alongside it. Our Tart Cherry Energy Pastilles are tart cherry flavoured and built on a glucose-fructose carbohydrate blend for fuelling during the session. If you want real Montmorency tart cherry, it's in Power Fluids (3g per serving). For sessions where you want variety to avoid flavour fatigue on longer days, our Mixed Fruit Energy Pastilles rotate well alongside them.
If you're not sure which flavour or format suits your gut, the Taster Pack is the low-risk way to trial them before committing to a bulk order, and our full range of bundles makes it easy to build a mixed-format fuelling kit for race day. There's no single correct answer in the energy drinks vs gels vs chews vs bars debate — there's only the combination that gets the right amount of carbohydrate into you, reliably, without a mid-race gut crisis. Work out your hourly target, test your options in training, and let the session dictate the format rather than the other way round.
