You signed up for Iceman. Maybe you’ve been riding through the winter, maybe you’re just dusting off the bike. Either way, if you’re reading this in May, you have one job right now: build the nutritional infrastructure that your race-day performance will sit on top of.
Not carb loading. Not race-week fueling. Foundation work. And just like building your aerobic base on the bike takes months — not days — building your nutritional base is something you do now, not in October.
Let’s get into it.
Why May Matters More Than You Think
Here’s the thing about nutrition for a race like Iceman: the window between now and November is actually a gift. You have time to experiment, adapt, and train your body — both physically and metabolically — to perform on race day.
The athletes who struggle at Iceman usually aren’t under-trained. They’re under-fueled in the months leading up to it. They skimp on carbs during hard training blocks, they don’t pay attention to protein, and they wonder why their legs feel flat by mile 15.
What you do in May sets the ceiling for what’s possible in November.
Carbohydrate Periodization: Fuel the Work
Carb periodization is one of the most effective tools endurance athletes have — and one of the most misunderstood. It doesn’t mean going low-carb all the time. It means matching your carbohydrate intake to the demands of your training.
Hard training day? Load up on carbs. Easy recovery ride or rest day? Pull back. It’s that simple in concept, and it pays off in two important ways:
- Performance: your muscles have the glycogen they need when they need it — so you can actually hit quality training efforts instead of slogging through them.
- Body composition: easy days with lower carbs keep your insulin levels steady and encourage fat oxidation — without sacrificing performance on the days that count.
A rough guide: on days with 60+ minutes of hard effort or interval work, aim for 5–7g of carbohydrate per kilogram of body weight. On easy or rest days, 3–4g/kg is usually plenty.
Protein: The Non-Negotiable
Endurance athletes chronically under-eat protein. It’s the most common gap I see in athlete nutrition, and it silently erodes your adaptation over months.
The current sports nutrition research is consistent: endurance athletes need 1.6–2.0 grams of protein per kilogram of body weight per day to support muscle repair, adaptation, and performance. That’s not a bodybuilder target — that’s what the research shows for people doing sustained aerobic training.
For a 150-pound (68kg) rider, that’s roughly 109–136 grams of protein daily. For most people, that’s significantly more than they’re currently eating.
Distribution matters too. Aim to spread protein across 3–4 meals and include a post-ride dose within 30–60 minutes after training — 20–40 grams is the sweet spot for stimulating muscle protein synthesis. Greek yogurt, cottage cheese, eggs, chicken, fish, or a quality protein shake all work here.
Training the Gut: Start Now
This one is underrated and often overlooked until it’s too late.
Your GI system is trainable. If you want to be able to eat and drink while riding hard in November — and you will need to — you need to start practicing now. That means fueling during training rides, not just before and after.
Start with real, familiar foods first: banana pieces, dates, peanut butter and honey sandwiches, rice cakes. Then gradually introduce whatever you plan to use on race day — gels, chews, sports drinks. Give your gut 10–16 weeks to adapt to on-bike fueling, which is exactly the window you have right now.
Athletes who skip this step often hit GI distress or appetite shutdown mid-race. Don’t be that person. Train your gut like you train your legs.
The Micronutrients That Actually Move the Needle
You don’t need to supplement everything — but there are a handful of micronutrients that consistently show up as performance limiters in endurance athletes. If you’re not paying attention to these, you may be leaving fitness on the table.
Iron / Ferritin
Low ferritin — the stored form of iron — is the most common silent performance killer I see, especially in women. You can have “normal” hemoglobin but still have depleted ferritin stores that impair oxygen delivery and leave you feeling chronically fatigued and flat on the bike. Get a full iron panel including ferritin, not just standard hemoglobin. Aim for ferritin above 50 ng/mL for optimal performance.
Magnesium
Magnesium is involved in over 300 enzymatic reactions — including energy production and muscle function. Endurance athletes lose significant magnesium through sweat, and most don’t replace it adequately through diet. Signs of low magnesium include muscle cramps, poor sleep, and general fatigue. Food sources: dark leafy greens, nuts, seeds, dark chocolate. A magnesium glycinate supplement in the evening is a low-risk, high-value addition for most athletes.
Vitamin D
If you live in Michigan, you are almost certainly vitamin D insufficient by the end of winter. Vitamin D plays a role in muscle function, immune health, and bone density. Get your levels checked — you’re aiming for 40–60 ng/mL. Most people need 2,000–4,000 IU daily to maintain adequate levels, especially heading into summer training.
Omega-3 Fatty Acids
Omega-3s support inflammation management, which matters a lot when you’re stacking training blocks week over week. Fatty fish (salmon, sardines, mackerel) twice a week is ideal. If that’s not realistic, a quality fish oil supplement of 2–3 grams of combined EPA/DHA daily is a reasonable approach.
Audience-Specific Notes
Women
If you haven’t had a full iron panel recently, this is priority number one. Low ferritin is pervasive in active women and rarely gets caught by standard bloodwork. You’ll also want to pay attention to how your energy and appetite shift across your cycle — many women find they need more calories and carbs in the luteal phase (the two weeks before your period), and forcing restriction during that window often backfires.
Masters Athletes
Protein timing around any strength training you’re pairing with your riding matters more than many realize, especially over 40. Muscle protein synthesis becomes less efficient with age, which means you need both more protein and better distribution throughout the day to stay ahead of it. Don’t skip the post-workout window.
Junior Riders
Growing athletes have higher protein needs relative to body weight than adults — closer to 1.8–2.2g/kg — because they’re rebuilding from training AND still developing. Parents: don’t let young athletes train on empty. A real pre-ride meal and a solid recovery snack aren’t optional for juniors.
Competitive and Pro Riders
If you’re tracking training stress scores (TSS) or using a power meter, you have the data to make carb periodization precise. Match your carbohydrate targets to your actual training load, not a generic formula. High-TSS days should be fueled aggressively — this is not the time to under-eat.
What to Focus on This Month
You don’t have to overhaul everything at once. Start here:
- Get a blood panel. Ask specifically for ferritin, vitamin D (25-OH), and magnesium. This is the most impactful thing most athletes can do in May.
- Start tracking protein for one week — not to obsess, but to find out where you actually are. Most athletes are surprised.
- Bring food on your next training ride. Even something small — a banana, a handful of dates. Get your gut used to eating on the bike.
- Pay attention to how you feel on hard days vs. easy days, and start matching your eating to your training load — not just to hunger.
Next month: the topic most riders completely underestimate in cold weather — hydration. Cold air blunts your thirst response, which means you can be significantly dehydrated and feel nothing. We’re going to talk about what that actually costs you, and exactly how to fix it before race day.
Gina Render is a certified Performance Nutrition Coach that works with a variety of athletes and active individuals both locally and remotely to help them meet their goals. As a wife, mom of two teens avid mountain biker, and strength athlete, she understands the demands that come with balancing life and sport. From sport-specific fueling to general nutrition, she’s your partner and advocate to empower you to Adventure More. Contact her at gina@adventure-more.com.














