Last month’s post was about the gaps in women’s fueling advice. This one is about a different problem. Men generally get plenty of nutrition advice — it’s just that a lot of it is wrong in the same predictable ways, and the mistakes change shape depending on how old you are.
A fifteen-year-old racing the Junior Iceman and a fifty-five-year-old racing his eighteenth Iceman are both under-fueling, but for completely different reasons and with completely different consequences. The teenager is under-fueling because he’s growing, riding hard, and physically cannot eat fast enough to keep up. The fifty-five-year-old is under-fueling on purpose, because he read somewhere that he should show up lighter.
It’s September. Iceman is Saturday, November 7 — about seven weeks out. Your training load is near its peak right now and your fueling discipline usually isn’t. Let’s go through it by decade.
The Mistake Almost Every Male Rider Makes
Before the age-specific stuff, here’s the pattern that shows up across every category.
The default approach to endurance fueling for most athletes is some version of “ride hard, eat whatever, it’ll sort itself out.” For a long stretch of your life, that works well enough. Young men have enormous metabolic margin — you can skip breakfast, ride three hours on one bottle and half a bar, eat badly, sleep poorly, and still perform.
The problem is that the margin is doing the work, not the strategy. And the margin shrinks. Slowly at first, then noticeably. When it finally runs out, most people don’t recognize what happened — they just conclude they need to train harder, which accelerates the exact problem they’re trying to solve.
The fix is the same at every age: stop treating food as an afterthought and start treating it as a training input. What changes with age is the margin for error, not the principles.
Carbohydrate: The Number That Actually Matters
Iceman is roughly 30 miles of punchy, cold-weather racing. Front-of-pack riders finish near 1:45. Competitive amateurs run 2:15 to 2:45. Mid-pack is 2:45 to 3:30. Plenty of riders are out there four hours or more.
At those intensities and durations, carbohydrate is the limiting fuel. Not fat, not protein, not willpower. And most male riders are running on considerably less than they need.
Daily intake during heavy training
- Moderate training weeks: roughly 5–7 grams of carbohydrate per kilogram of body weight per day
- Hard training weeks with multiple quality sessions: 7–10 g/kg/day
For a 180-pound rider, the hard-week range works out to roughly at least 570 grams of carbohydrate daily. That is substantially more than most guys eat, and it’s the single most common gap I find when I review a male athlete’s actual intake.
On the bike
- Efforts under 90 minutes: 30–60 g of carbohydrate per hour
- Efforts over two hours at real intensity — which is Iceman for nearly everyone: 60–90 g per hour
That upper range requires a mix of glucose and fructose sources, and it requires practice. Your gut adapts to carbohydrate intake the same way your legs adapt to intervals. Do not try 90 grams an hour for the first time on November 7. Start now, on your long rides, and build tolerance over the next twelve weeks.
The September trap
Here’s the pattern I see every fall. Training volume peaks in August and September. A rider looks at the calendar, decides he’d like to show up in Kalkaska a few pounds lighter, and cuts carbohydrates — at exactly the moment his body needs the most fuel it will need all year.
Six weeks later his intervals feel terrible, his recovery is shot, and he’s frustrated. Then he pushes harder, which makes it worse.
If you want to change your body composition, the window for that was April through June. In August, the job is fueling the work. A slightly heavier rider who’s properly fueled beats a lighter rider who’s dug a hole, every single time, over 30 miles.
Protein: How Much, and How to Spread It
Endurance athletes need 1.6 to 2.0 grams of protein per kilogram of body weight per day. For a 180-pound rider, that’s roughly 130 to 165 grams.
Total matters, but distribution matters nearly as much. Aim for 30 to 40 grams at each main meal rather than eating a light breakfast and an enormous dinner. Four moderate servings across the day drive more muscle repair than the same total dumped into one sitting.
The gap is almost always breakfast. Coffee and a bagel is not a protein serving.
Young Male Riders
If you’re a teenage rider, or you’re the parent of one, this section is the important one.
A young male athlete in a growth phase has the highest per-pound energy demand he will ever have. He is building bone, building muscle, running a nervous system through a major renovation, and training on top of all of it. His fuel needs are not “adult needs, scaled down.” Per pound of body weight, they are higher than an adult’s.
What this means practically
- Eat frequently. Three meals is rarely enough during a growth spurt with a training load on top. Plan for meals plus two or three substantial snacks. The after-school window before evening riding is the one most often missed.
- Protein across the day, not just at dinner. Growth and training both draw on it. Breakfast protein is the usual weak point in teenage eating.
- Carbohydrate is not the enemy. Teenage boys pick up a startling amount of nutrition misinformation from social media, most of it aimed at physique rather than performance. A young endurance athlete needs carbohydrate, and plenty of it.
- Iron matters here too. Rapid growth raises iron needs substantially, and heavy training raises them further. If a teenage rider is chronically fatigued and training isn’t producing results, an iron panel is worth asking about.
- Calcium and vitamin D. Roughly 1,300 mg of calcium a day through the teenage years, managed by bloodwork and a doctors guidance – don’t just start supplementing. Focus on nutrition. Peak bone mass is built during adolescence and it’s largely built by about age twenty.
On weight and young athletes
Cycling has a weight (diet) culture, and it reaches teenagers early. I want to be direct about this: under-fueling in an adolescent male athlete suppresses growth, suppresses testosterone, compromises the bone density he’ll carry for the rest of his life, and reliably makes him slower.
Low energy availability is not just a female issue. It affects male athletes too, and it’s diagnosed later in men because nobody’s looking for it — there’s no missed period to serve as an obvious alarm. Warning signs in a young male rider: growth that stalls, frequent illness, stress injuries, persistent fatigue, mood changes, training that stops producing progress.
If a teenage rider is talking about cutting weight for racing, that’s a conversation to have with a sports dietitian, not a plan to execute alone.
Parents: next month’s post covers the family and kids’ race logistics in full. What to pack, and what young riders will actually eat on a cold race morning.
Men in Their Twenties and Thirties
This is the stretch where everything works and nothing is optimized. The margin is wide, so mistakes stay invisible.
The thing worth doing now: build the habits while it’s easy, because they compound. Specifically —
- Practice race fueling in training instead of assuming you’ll figure it out on race day. Gut training is real and it takes weeks.
- Get protein to your target consistently. Muscle you build and maintain in your thirties is muscle you’re not fighting to keep in your fifties.
- Start resistance training if you haven’t. Two short sessions a week. It’s protective for bone, it’s protective for durability on technical descents, and it gets harder to start the longer you wait.
- Take sleep as seriously as you take intervals. It’s the highest-return recovery input available to you and it’s free.
You can get away with skipping all of this. You’ll just be a worse rider at forty than you needed to be.
Masters Men: Forty and Up
Something genuinely changes, and it’s worth naming so you can respond to it instead of just being annoyed by it.
Muscle becomes less responsive to protein. The same 20 grams that triggered a solid repair response at twenty-five does less at fifty-five. The fix is a larger per-meal dose — 35 to 40 grams at each main meal — plus resistance training, which restores a good deal of that sensitivity.
Recovery takes longer. Glycogen replacement slows, muscle repair slows, and the adaptation window stretches. Practically: prioritize the post-ride meal more deliberately than you did at thirty. Carbohydrate plus protein within an hour or so, especially after hard sessions and especially when you’re riding again the next day.
You likely need more carbohydrate than your perceived effort suggests, not less. This is counterintuitive and it trips up a lot of masters riders. Your ride may feel easier than it used to at the same heart rate, but the substrate demand hasn’t disappeared. Under-fueling masters riders is extremely common.
Body composition moves even when nothing else changed. The instinct is to cut calories. The better lever is more protein, more resistance training, and holding your carbohydrate intake steady during hard training. Cutting calories during your peak block costs you fitness and doesn’t fix the underlying issue.
Sleep quality degrades. Which means recovery nutrition has to carry more of the load, and it also means evening alcohol costs you more than it used to.
Alcohol: The Honest Version
You’re going to get a beer at Timber Ridge after you cross the line, and you should. That’s not what this is about.
What matters is the training block. Alcohol impairs glycogen replacement, blunts muscle protein synthesis for hours afterward, disrupts sleep architecture even when total sleep time looks fine, and costs you more recovery as you get older. Three or four drinks the night before a key session is a meaningfully compromised session.
Practical version: keep it away from your hardest training days and away from the night before anything that matters. Race weekend, that means Friday night at the Expo is not the night for it. Saturday afternoon at the finish festival absolutely is.
Creatine
The evidence here has gotten strong enough that it’s worth mentioning directly.
Creatine monohydrate, 3 to 5 grams a day, is one of the most studied and best-supported supplements available. The benefit is clearest for repeated high-intensity efforts — which describes Iceman well, given how punchy the course is. The evidence for masters athletes in particular, for muscle maintenance and possibly for cognition, has strengthened considerably.
It’s inexpensive, it doesn’t require loading, and it’s well tolerated. Expect a small weight increase from intramuscular water, which is not fat and is not a performance penalty. Worth a conversation with your physician, particularly if you have kidney concerns.
For teenage athletes: this is a conversation for a physician and a sports dietitian, not a decision to make off a blog post.
Race-Day Carbohydrate Math
Take your realistic finish time and work backward.
- 1:45–2:15 (front of race): 80–90 g of carbohydrate per hour, almost entirely liquid and gel. You won’t have hands free or heart rate low enough to chew much.
- 2:15–2:45: 70–90 g per hour. Mix of gels, chews, and drink mix.
- 2:45–3:30: 60–75 g per hour, plus real food if your stomach handles it in the cold.
- 3:30+: 50–70 g per hour, and eat on a timer rather than by feel. At this duration in cold weather, appetite is not a reliable signal.
And the cold-weather warning that applies to everyone here: you will not feel hungry, you will not feel thirsty, and you will under-fuel if you go by sensation. Set a timer on your computer. Eat when it goes off, whether you want to or not.
Your September Action List
- Add up one honest day of carbohydrate intake and compare it to 5–7 g/kg. Most riders find a gap.
- Fix breakfast protein. Aim for 30–40 grams before you get on the bike.
- Practice 60–90 g of carbohydrate per hour on your next three long rides. Build the tolerance now.
- Put two strength sessions on the calendar weekly through October.
- Pick your hardest training days and keep alcohol away from the night before them.
- If you have a teenage rider in the house, look honestly at whether he’s eating enough during his growth phase.
The theme across every age here is the same: the guys who fall apart at Iceman are almost never under-trained. They’re under-fueled, and they got there by treating nutrition as the part that doesn’t require a plan.
Coming up in October: the whole family. Fueling young riders from the Sno-Cone and and beyond, plus the race-morning parent checklist that keeps everyone fed and functional in the cold.
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.

