Supplements for Runners — Running Nutrition | 6AM Run

The hardest clothing decision in running is not a winter training run. It is marathon morning. You stand around for an hour in the cold, run hard for three to five hours as the temperature climbs, then stop — sweaty and suddenly freezing — with the least energy left to deal with it. Dress for the start and you overheat by mile 10. Dress for mile 20 and you burn fuel just staying warm before the gun.

Here is the system I use for fall marathons in that tricky 30- to 60-degree window — including New York in early November, where the start can feel 15 degrees colder than the finish in Central Park.

Dress for Mile 3, Carry for Mile 0

Once you are running at marathon effort, your body generates serious heat. Follow the rule experienced runners use: dress as if it is 15 to 20 degrees warmer than the thermometer says. If it is 45 at the start, your racing layers should feel right for 60 to 65.

That does not mean standing in a corral in a singlet at 7 a.m. Your racing layers follow the rule; everything you wear just to stay warm before the start is disposable or checkable. Old sweatshirts, thrift-store hoodies, trash bags with head and arm holes, and cheap knit gloves exist for exactly this job. Shed them at the start or in the first mile, with zero regret.

The Temperature Chart I Actually Use

55 to 60 degrees: Singlet or short-sleeve tech shirt, shorts, thin gloves early if your hands run cold. This is close to ideal marathon weather — do not add a layer just because the morning feels chilly.

45 to 55 degrees: Singlet or light short-sleeve, shorts, arm sleeves, and thin gloves. Arm sleeves are the secret weapon here: comfortable early, and they roll down or come off in seconds when you warm up.

35 to 45 degrees: Light long-sleeve or a singlet plus arm sleeves and a thin vest, tights or shorts, gloves, and a headband or light beanie over your ears. Keep your core and ears covered; let your legs vent.

30 to 35 degrees: Long-sleeve base layer, tights, mittens (warmer than gloves because fingers share heat), beanie, and a wind layer for the wait. A buff you can pull over your face for windy early miles helps more than another shirt.

Wind and rain change the math more than temperature. A windy 45 can feel colder than a calm 35, especially on exposed bridges. If rain is forecast, wear a brimmed hat to keep water out of your eyes and wool-blend socks, which stay comfortable when wet. Skip cotton in every scenario — it holds water, gets heavy, and chafes.

Protect the Three Places Runners Forget

Hands. Cold hands fumble fuel, watches, and pins. Wear cheap gloves you can toss at an aid station, and practice opening your fuel with gloves on during training — not for the first time at mile 16.

Feet. Wear the shoes and socks you trained in, full stop. Race week is not the time to test anything new — the same rule in our guide to preventing blisters and chafing during a marathon. Do a final gear check the night before, as part of your day-before marathon checklist.

Skin. Cold, dry air plus hours of fabric movement is a chafing recipe even when it is not hot. Apply anti-chafe balm anywhere seams, waistbands, or a belt will rub. Cold does not prevent chafing — it just makes you notice it later.

Fueling in the Cold: The Hidden Problem

Cold weather changes your nutrition plan in two ways. First, you feel less thirsty, so runners under-drink in fall marathons even though they are still sweating under their layers. Follow the rhythm in our race week hydration plan and take small, regular sips instead of waiting for thirst.

Second, some fuels get hard in the cold and gels turn thick. Keep fuel close to your body — an inside pocket or a belt against your waist — so body heat keeps it easy to chew and swallow. This is one reason I personally switched to gummies for cold races: I use our Marathon Gummies because they stay portable, are easy to eat with gloves on, leave no sticky mess on cold hands, and let me take one or two at a time to spread carbs evenly. If gels work for you, keep using them — a fuel you trained with always beats a theoretically better fuel you have not. Rehearse the timing on your last long runs, and check your pacing plan in our NYC Marathon course strategy so cold early miles do not trick you into starting too fast.

The Finish Line Is the Coldest Part

The moment you stop, heat production drops but wet layers keep pulling warmth away. In a big-city marathon you may walk 20 to 40 minutes before reaching your gear bag. Plan for that walk: check a real warm layer and dry socks, take the foil blanket even if you feel fine, and keep walking.

Once I am back, my routine is simple: dry clothes first, a warm shower, a real meal with protein and carbs within a couple of hours, and I mix up FinishLine as part of that recovery window — amino support after emptying the tank, while I focus on food, fluids, and getting off my feet. If you are in taper week now, our taper week nutrition guide will help you fill the tank you are about to spend.

Your Cold-Weather Marathon Checklist

• Race layers chosen by the dress-for-mile-3 rule, tested in training
• Disposable warm layer for the corral
• Arm sleeves for the 40- to 55-degree range
• Gloves or mittens you can open fuel with — and can toss
• Hat or headband for ears; a brim if rain is coming
• Anti-chafe balm applied before you leave
• Fuel stored close to your body
• Gear bag with a dry top, warm layer, and dry socks

Cold race weather is not a disadvantage. Handled well, 40s and low 50s are the fastest marathon conditions most of us will ever get. The runners who suffer in it are rarely undertrained — they dressed for the thermometer instead of for the miles.

What is your go-to layer for a cold start line — arm sleeves, a disposable hoodie, or the classic trash bag? Tell me in the comments; I read every one.

— Hami, 6AM Run