If you've ever been told you need to "carb load" for a week before a race, or that fasting is some magical fat-melting, cancer-preventing hack, you've been fed misinformation that could actually hurt your performance and your progress. This week's C3 Method Patreon Q&A tackles the real science behind carb loading, fasting, aggressive fat loss dieting, and the frustrating "skinny fat" plateau — all straight from questions submitted by real clients preparing for an Ironman, a cruise vacation, and everything in between.
Rob Polenik, the strength and nutrition coach behind C3 Method, holds a Master's in Human Nutrition, is ACSM-certified as a personal trainer, and holds the NASM Corrective Exercise Specialist credential. He's coached more than 3,000 clients through fat loss, muscle building, and endurance events, and in this episode he answers eight nutrition and training questions plus one business question submitted directly by his Patreon community.
In this post, you'll learn exactly how to time your carbohydrate intake before an endurance event without gaining unnecessary water weight, how to adjust your calories when vacation interrupts your training, the truth about fasting and fat loss, how aggressive you can safely start a diet, and how to finally build visible muscle when you feel stuck between "too fat" and "too skinny."
How to Carb Load the Right Way for a One-Day Endurance Event
The biggest myth Rob addresses head-on: you do not need to carb load for an entire week before a race. Doing so can actually hurt your performance and your weigh-in.
The Glycogen Science
When you eat carbohydrates, your body combines them with water and sodium and stores them in your muscles as glycogen — your literal fuel tank. But glycogen isn't a static reserve. Your body is constantly filling and depleting it 24/7, using it to tie your shoes, walk across a room, or climb stairs. That means loading up on carbs five days before an event is pointless — whatever you store on Monday is long gone by Saturday.
The 2-Day Protocol
Instead, Rob recommends starting 2 days before your event. On both of those days:
- Eat 10% above your maintenance calories (find maintenance using the BMR calculator at calculator.net)
- Consume 1 gram of protein per pound of bodyweight
- Include 30–50 grams of fat, favoring a roughly 2:1 ratio of unsaturated to saturated fats
- Fill the rest of your calories with carbohydrates
Hydration & Sodium
Drink 1 to 1.5 ounces of fluid per pound of bodyweight daily, since your body needs water alongside glucose and sodium to actually form glycogen. If you're worried about sodium, just salt your meals — at a 10% surplus, you're likely getting plenty already. Loading too early can pack on 5–6 pounds of water weight and up to 2 pounds of actual fat — a real problem if you're competing in a weight class.
Adjusting Nutrition When Travel Interrupts Your Training
Going on vacation and can't train like normal? Rob's approach is simple: lean toward the lower end of your normal calorie range rather than dramatically cutting calories.
Every client has a calorie range — some as tight as 200 calories, others as wide as 800 — built around their history and goals. Dip below that range and your body starts fighting fat loss with negative hormonal adaptations. Stay within it, just toward the bottom, when you're less active.
Before leaving for a trip, Rob pushes training hard so his body has extra muscle repair work to do while he's away — that repair process burns calories passively. He also leans on non-exercise movement: taking stairs, walking after meals, staying generally active. It's not a huge calorie burn, but it keeps you engaged and disciplined with your food choices.
If your trip stretches beyond one week with zero training, pull an additional 5–10% off the bottom of your range. For a 2,000–2,200 calorie range, that might mean eating around 1,900 calories. If you start feeling fatigued, moody, or run-down, eat more for a day and reassess.
Fasting for Fat Loss: Separating Real Science from Hype
Fasting doesn't have any special fat-burning power — it's simply a tool for reducing calorie intake. The real question is whether it's the right tool for you.
The pro: fasting creates a black-and-white structure. If you struggle with portion control — like turning a 2-tablespoon serving of peanut butter into "however much fits on the spoon" — removing all gray area can make adherence easier.
The con: massive misinterpretation of results. If you don't eat for 24 hours, you might drop 4+ pounds on the scale. That is not fat loss — it's the missing weight of food and the water your body would have stored with those carbohydrates. Since roughly 3,500 calories equals one pound of fat, someone who normally eats 2,000 calories a day can't lose a pound of fat by skipping one day of eating; they simply haven't created that big of a deficit.
As for cancer prevention, Rob is clear: while fasting can trigger a "cleaning house" effect in cells (autophagy), there's no credible evidence it prevents or cures cancer. Treat that claim with skepticism.
How Aggressive Can You Start a Fat-Loss Diet
Preparing for an event like a cruise or vacation and want to lean out fast? Rob's rule: don't go below your BMR, and honestly, you rarely need to get that low.
Start your diet at BMR plus 10% — this is aggressive enough to drive significant fat loss while protecting your metabolism and hormones from the negative adaptations that come with chronically underfueling. Give yourself permission to eat slightly above that number for a day or two if your energy, mood, recovery, or motivation crashes, then drop back down. This isn't a compromise — it's what makes an aggressive deficit sustainable for 8+ weeks instead of falling apart after 10 days.
Fixing "Skinny Fat": The Right Sequence to Build Visible Muscle
If you feel like you're never lean enough to see your muscle, but never muscular enough to feel good when you diet down, you're not alone — Rob lived this exact struggle at 165 pounds and 6 feet tall in his own late teens.
The fix isn't training harder in both directions simultaneously — it's sequencing. Fat loss happens faster than muscle growth, so prioritize dropping body fat first. Rob's practical framework: push your body fat down aggressively, then hold and slightly rebound (for example, lose 20 pounds, allow 5 back), then push down again. This step-down approach lets you see continuous visible progress instead of yo-yoing between two mediocre looks.
While cutting, train like a bodybuilder — full hypertrophy-style programming — while eating in a fat-loss deficit. Cardio is optional and only useful as a tool to create additional calorie deficit or allow you to eat more food while dieting; it does nothing to preserve or build muscle tissue. Nutrition and resistance training drive the outcome — cardio is a distant third.
Smarter Training Logs, Rep Ranges & Recovery That Actually Work
For trainers and lifters building their own programs, Rob breaks down rep ranges by goal:
- Strength/power: 5 reps or fewer
- Muscle growth: 5–20 reps (compound lifts lower in the range, isolation work higher)
- Muscular endurance: 10+ reps
Every rep range assumes you're training to the edge of technical failure — otherwise the range doesn't matter.
To optimize your training log beyond sets, reps, and weight, track:
- Technique quality on a 1–5 scale for every working set
- Rest times, since inconsistent rest (a 5-minute chat break instead of your usual 2) will fake progress
- Load type — underloaded (technique-focused), normal, or overloaded variations, rotated to drive continuous progressive stimulus
- Lifestyle factors — sleep, food, hydration, and stress, since these explain why a workout felt easy or brutal
For recovery, Rob ranks priorities clearly: sleep, calories, protein, and hydration dwarf every recovery gadget on the market. Massage and heat (saunas, Epsom salt baths) genuinely help; cold plunges, in his clinical and personal experience, are overrated and sometimes counterproductive for muscle repair.
Key Takeaways
- Start carb loading only 2 days before your event — eating extra carbs a week out just adds water weight and unnecessary fat, not usable fuel.
- Hit 1g of protein per pound of bodyweight, 30–50g of fat, and fill the rest with carbs during your 2-day pre-event loading window.
- Hydrate at 1–1.5 oz per pound of bodyweight daily to actually convert those carbs into stored glycogen.
- Stay within your normal calorie range (toward the bottom) during short trips instead of slashing calories when you can't train.
- Treat fasting as a calorie-control tool, not a fat-loss shortcut — rapid scale drops from fasting are water and food weight, not body fat.
- Never diet below your BMR for extended periods; start fat loss at BMR plus 10% and adjust upward only when energy or recovery crashes.
- Get lean before building muscle if you're stuck in a "skinny fat" plateau — fat loss happens faster and builds motivation for the muscle-building phase.
Ready to Put This Into Practice?
Every body is different. Rob works one-on-one with clients to build personalized nutrition and training plans that actually stick. With 3,000+ clients coached and results ranging from Pro Cards to D1 scholarships, the C3 Method delivers.
Book Your Free Consultation — limited spots available.
Frequently Asked Questions
Q: How many days before a race should I start carb loading?
Start two days before your event, not a full week. Eating in a 10% calorie surplus with high carbohydrate intake for just 48 hours is enough to fully saturate your glycogen stores without adding unnecessary water weight or body fat.
Q: Does fasting help prevent cancer?
There's no credible evidence that fasting prevents or cures cancer. Fasting does trigger a cellular "cleanup" process called autophagy, but claiming it prevents cancer significantly overstates the current research.
Q: What's the lowest I should ever cut my calories for fat loss?
Don't go below your BMR (basal metabolic rate) for any sustained period. Starting a fat-loss diet at BMR plus 10% gives you an aggressive but sustainable deficit that won't trigger the metabolic slowdowns that come from chronic underfueling.
Q: Should I do cardio to lose fat and keep my muscle?
Cardio is optional and mainly useful for creating extra calorie burn so you can eat more while dieting — it doesn't build or preserve muscle tissue. Your nutrition and resistance training program should do the heavy lifting for both fat loss and muscle retention.
Q: I feel like I'm "skinny fat" — should I bulk or cut first?
Cut first. Fat loss happens faster than muscle growth, so getting leaner gives you quicker visible progress and better motivation before shifting into a muscle-building phase.
Q: Are cold plunges actually good for muscle recovery?
Based on both current conflicting research and years of client feedback, cold plunges are overrated for muscle repair. Prioritize sleep, sufficient calories, adequate protein, and hydration first — those four factors outperform any recovery gadget.
Conclusion
The theme running through this entire Q&A is the same one that separates real coaching from internet fitness myths: precision beats extremes. You don't need a week of carb loading, starvation-level dieting, or ice baths to get results — you need the right amount of the right inputs at the right time. Whether you're prepping for an Ironman, trying to survive a vacation without losing progress, or finally trying to see the muscle you've built, the answer is almost always a calculated, personalized adjustment rather than an all-or-nothing overhaul.
If you've been guessing your way through carb loading, fasting, or your fat-loss deficit, now's the time to get a plan built specifically around your body, your goals, and your timeline.
Take the Next Step
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Listen to the Episode
Want to hear Rob break down all of these answers directly, including the full business coaching discussion on growing your income beyond in-person training? Listen to the full episode here: 2265 - Patreon Weekly Q&A - Week of May 5 2025.