120g Carbs Per Hour: Should Regular Guys Copy Endurance Pros?

If you’ve been around endurance fitness lately (running, cycling, Hyrox, long hikes, even “hybrid athlete” training), you’ve probably heard someone bragging about taking in 90…100…120 grams of carbs per hour.

That’s a real thing. Pros do it. Some regular people can build up to it.

But most guys jump in way too fast, turn their stomach into a cement mixer, and then declare “fueling doesn’t work.”

Let’s make this simple: when high-carb fueling helps, when it’s pointless, and how to do it without blowing up your gut.

First: what “carbs per hour” actually means

It’s exactly what it sounds like: how many grams of carbohydrate you consume during exercise, per hour.

Common examples:

• 1 gel (usually ~20–25g carbs)
• Sports drink mix in a bottle (anywhere from ~20g to 100g carbs depending on the mix)
• Chews, bananas, rice cakes, etc.

Why carbs? Because during longer or harder sessions, carbs help maintain energy and pace, and can reduce the “bonk” feeling.

The trend: 120–140g/hour (and why it’s not for everyone)

Men’s Health has covered endurance athletes pushing huge numbers — 120 to 140 grams per hour — by using gels and drink mixes and training their gut to tolerate it.

But the same article also quotes an experienced ultrarunner recommending 60 to 70 grams per hour for athletes in their 40s or older during very long races, and warning that going over 100 g/hour can trigger GI problems for most non-elites.

Translation: the internet is showing you the ceiling, not the starting point.

The practical guideline most guys should start with

A simple, evidence-based baseline:

• 30–60g carbs/hour for most endurance sessions
• If you’re going longer than 2 hours, you can often benefit from more than 60g/hour

The American College of Sports Medicine (ACSM) puts it plainly: endurance athletes should consume at least 30–60 g of carbs per hour, and >60 g/hour for sessions lasting more than two hours.

That’s a great “real life” range for men who train hard but don’t have a pro-level gut.

When you actually need higher carbs/hour

You’ll get the most value from carbs during training when:

• Your session is longer than ~75–90 minutes
• It’s hard (tempo, intervals, race pace, lots of hills)
• You’re doing back-to-back training days and need to recover faster
• You’re prone to bonking, headaches, or feeling mentally foggy mid-session

If you’re doing a 45-minute easy run or a casual lift, you don’t need to force gels.

Why most guys fail with high-carb fueling

Because they do one (or more) of these:

• Go from “no fuel” to “120g/hour” overnight
• Use super-concentrated mixes without enough water
• Pick random products and don’t test them
• Don’t practice the timing (they slam everything at once)

High-carb fueling is a skill. Your gut needs training just like your legs.

A simple step-up plan (no GI drama)

Use this progression if you’re training for longer events (half marathon+, long rides, Hyrox-style endurance blocks, etc.).

Week 1–2: 30g/hour

• 1 gel per hour or a light sports drink
• Practice taking small sips/bites steadily

Week 3–4: 45–60g/hour

• 2 gels per hour, spaced out or 1 gel + drink mix
• Keep it boring and repeatable

Week 5+: 60–90g/hour (only if needed)

• This is where “multiple carb sources” (glucose + fructose blends) often feel easier
• Test it in training, not on race day

90–120g/hour

Possible for some athletes, but not required for most. If you want to try it, do it slowly and expect a learning curve.

Easy fueling options (with best-effort affiliate links)

Budget “real food” approach:

• bananas
• pretzels
• fruit snacks
• honey sandwich

Convenient endurance products:

• Maurten Gel 100 (popular gel; 25g carbs per sachet)
• Skratch Labs Hydration Sport Drink Mix (lighter carbs + electrolytes)
• Skratch Labs Super High-Carb Sport Drink Mix (very high carbs per bottle)

Amazon links (best effort; if a product page changes, just search the name):

• Maurten Gel 100: https://www.amazon.com/s?k=Maurten+Gel+100&tag=shop40c-20
• Skratch Labs Hydration Sport Drink Mix: https://www.amazon.com/s?k=Skratch+Labs+Hydration+Sport+Drink+Mix&tag=shop40c-20
• Skratch Super High-Carb Sport Drink Mix: https://www.amazon.com/s?k=Skratch+Super+High-Carb+Sport+Drink+Mix&tag=shop40c-20

The bottom line

If you’re a regular guy training for real life (and maybe a race now and then), you don’t need to chase 120g/hour to get results.

Start with 30–60g carbs/hour, get consistent, and only push higher if your sessions are long enough and hard enough to justify it.

Fueling should make you feel stronger — not nauseous.