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.

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External link used in article:

• ACSM (carb intake during prolonged exercise): https://acsm.org/athletes-kitchen-optimizing-immune-response/

Men’s Health context (high-carb trend + cautions):

• https://www.menshealth.com/fitness/a65428608/high-carbs-ultrarunning-david-roche/