How to Fuel Endurance Training | Let’s Fuel Growth

Fueling your body for endurance training means matching what you eat to the length and intensity of the session: a carbohydrate-forward meal two to three hours before, 30 to 60 grams of carbohydrate per hour once a training day runs past 90 minutes, and a combined protein and carbohydrate meal within the first two hours after you finish. Get that order right and the training itself gets easier to show up for, which is the whole point of training for something, whether that is the MN Mile or an Everest Base Camp trek.

This is the question we hear most from people training for the MN Mile and our Everest Base Camp 2027 expedition: what do I actually eat around a long training day. Here is what we tell every athlete in our community, built around the training blocks we run ourselves.

How Do I Fuel My Body Before a Long Training Session?

Eat a carbohydrate-heavy meal two to three hours before a long session, with a small amount of protein and very little fat or fiber, which both slow digestion and can sit heavy once you start moving. Oatmeal with banana and honey, a bagel with peanut butter, or rice with chicken and a little soy sauce all do the job. If you are training before work, a smaller version of the same combination 45 to 60 minutes out, like toast with jam or a banana with a handful of pretzels, covers you without the two-hour runway.

The mistake we see most in our own training groups is skipping breakfast before a 7am weekend training block and trying to push through on willpower. Willpower is not a macronutrient. Eat something.

How much should I eat and drink during training?

Once a session runs past 90 minutes, plan on 30 to 60 grams of carbohydrate per hour and roughly 16 to 24 ounces of fluid per hour, more in heat or at altitude where your body loses water faster than thirst tells you. A banana, a handful of dried fruit, a sports drink, or an energy gel each cover 20 to 30 grams of carbohydrate, so one every 30 to 45 minutes keeps you in range without overloading your stomach at once.

For our Everest Base Camp trekkers, this changes above about 10,000 feet: appetite drops at altitude even as your body needs more fuel, so we coach people to eat on a schedule, not on hunger, during the trek itself. Dry, easy-to-chew options like crackers, nuts and dried fruit travel and digest better than anything heavy at elevation.

Training block	Carbs per hour	Fluid per hour	What that looks like
Under 60 minutes	Not usually needed	8-12 oz	Water is enough for most people
60-90 minutes	15-30g	12-16 oz	Half a banana, a few pretzels
90+ minutes, sea level	30-60g	16-24 oz	Gel or sports drink every 30-45 min
Multi-hour, altitude (EBC-style)	30-60g, on a schedule	20-24 oz, more in dry air	Crackers, nuts, dried fruit, electrolyte mix

What should I eat after a hard training day to recover?

Eat a meal with both protein and carbohydrate within about two hours of finishing, which is when your muscles are most ready to use it for repair and to refill the glycogen you burned. A roughly 3-to-1 ratio of carbohydrate to protein works for most people: chocolate milk and a banana, a turkey sandwich, or rice with eggs and vegetables all fit. Waiting until you are starving at 8pm to eat anything is the most common recovery mistake we see, and it is an easy one to fix with a plan made the night before.

Hydration matters here too. A simple check: if your urine is pale yellow within a few hours of finishing, you have replaced enough fluid. Dark yellow means drink more, plain water is fine unless the session ran long and hot, in which case add electrolytes.

These ranges track with the International Society of Sports Nutrition’s position stand on nutrient timing, which is the research most sports dietitians point to when they build a fueling plan for an endurance athlete.

Do I need sports drinks and gels, or will real food work?

Real food works for most training sessions under about two hours. Sports drinks, gels and chews earn their place on longer days because they are easier to digest while moving and give you a known, repeatable amount of carbohydrate, which matters on race day or trek day when you cannot afford a stomach issue to derail the day. Our coaching advice: use real food in training so your gut gets used to eating while moving, then bring the products you trained with to the MN Mile or to Everest Base Camp. Race day and trek day are the wrong day to try something new.

How is fueling different for a short race like the MN Mile versus a multi-week trek like Everest Base Camp?

The MN Mile is a single morning, so fueling is mostly about the 24 hours before: a normal dinner the night before, a carb-forward breakfast two to three hours out, and water or a sports drink on course if you are running the Naughty Mile. Everest Base Camp training and the trek itself are a multi-week fueling problem, where consistent daily intake, appetite loss at altitude, and enough protein to prevent muscle breakdown over consecutive long days all matter more than any single day’s menu. If you are training for EBC with us, we build fueling into the same long training days we build cardio into, specifically so your stomach and your habits are proven before you are 14,000 feet up a mountain.