If you've ever cut calories to nearly nothing hoping the fat would just melt away, you need to hear this: undereating and fat loss don't actually go together the way you think they do. Rob Polenik knows this better than almost anyone in the coaching industry, because he lived it — for two and a half years, starting at age 15, he was anorexic. Not "eating clean." Not "cutting." Anorexic. And the body composition results he got from starving himself were the opposite of what he wanted.
Rob is now the founder of the C3 Method, holds a Master's in Human Nutrition, is ACSM-certified as a personal trainer, carries the NASM Corrective Exercise Specialist credential, and has coached more than 3,000 clients — including IFBB pros, natural bodybuilding pros, world record–holding powerlifters, Olympic athletes, and CrossFit Games competitors. But before any of that, he was a 165-pound "skinny fat" teenager doing 250 push-ups and 250 sit-ups a night while eating almost nothing, convinced that starvation and sheer punishment would build the body he wanted.
In this episode, Rob walks through exactly what happened during those 2.5 years — the flawed logic, the self-punishment, the eventual discovery of protein and carbohydrates — and translates it into the nutrition framework he now uses with clients ranging from clinically diagnosed anorexia patients to elite athletes. You'll learn why chronic undereating actually preserves stubborn fat while burning away muscle, how much protein you actually need, why carbs don't make you fat, and how to calculate your real maintenance calories.
Rob's anorexia didn't start with a diagnosis or a diet plan — it started with a throwaway comment during a play fight on his 15th birthday: "at least I'm not fat." He wasn't overweight. He describes himself at the time as "skinny fat" — 5'6", 165 pounds, with a thin layer of soft fat covering his entire frame and zero visible muscle definition.
But the comment landed somewhere deep. Rather than getting angry at his friend, Rob turned the blame inward: if someone could look at me and think that, it's my fault for letting myself get this way. That night he set a goal — 250 push-ups and 250 sit-ups, every single day — despite the fact that he couldn't do 20 of either in a row.
His 15-year-old reasoning went like this: exercising a muscle makes it grow, and exercising over a body part burns the fat covering it. Pair that with eating almost nothing, and in his mind, fat loss was guaranteed. He skipped breakfast (partly due to an undiagnosed GERD and sleep apnea issue), picked at school lunch just enough to blend in with friends, and ate the smallest dinner he could get away with in front of his parents without raising alarms.
He kept this up for an entire year — missing only 10 days, seven of which were spent hiking the Appalachian Trail on a Boy Scout trip. The result? No visible chest development. No abs. Still 165 pounds. Still "skinny fat." His body had nothing to build muscle with, so the exercise stimulus went nowhere.
At 16, Rob decided the missing piece was resistance training, not just bodyweight work. His parents bought him a $600 weight set — bench press, squat/dip attachment, leg extension/curl machine, an EZ curl bar, and 300 pounds of plates. What followed wasn't training. It was self-punishment disguised as fitness.
He'd load a curl bar with weight he couldn't manage for more than 20 total reps and refuse to set it down, telling himself that dropping the bar early was proof of weakness — proof that he deserved to be fat. He'd punch a canvas heavy bag bare-knuckled until his knuckles bled, viewing the blood as a symbolic marker of "leaving his old self behind." He trained through inflammation so severe he vomited while trying to tighten a bolt with an inflamed elbow. In over 26 years of training, he's only ever taken a full week off twice — once for that inflammation, once for anxiety so severe that lifting made it worse.
And still — 165 pounds. Still no visible muscle. Because no amount of training volume can build tissue the body has no raw material to build with.
At 17.5, heading into his senior year and dreading meeting a whole new set of people at college in his current state, Rob started watching bodybuilding interview shows like Rx Muscle and the Iron Asylum. He noticed something every bodybuilder mentioned constantly: protein.
It clicked. If muscle is built from protein, and he'd been giving his body zero material to build with, of course nothing had changed in 2.5 years. He compares it to trying to build a brick house: "I had all the workers in the world, I had all the people available to build a house, but I didn't have any material."
Once he started eating protein, results still stalled — because protein alone can't power the construction process. Reading further, he connected the dots between the carbohydrate intake bodybuilders discussed and their ability to actually convert protein into muscle. In his own words, protein is the bricks; carbohydrates are the workers' fuel. Avoiding carbs, he realized, wasn't protecting him from fat gain — it was preventing muscle growth entirely.
He avoided dietary fat almost entirely at first (still operating on the flawed "fat makes you fat" belief), eventually settling on a diet built around a now-infamous strategy: a gallon of fat-free milk a day, inspired by a magazine article from bodybuilder Lee Priest. He kept this up for two full years. It wasn't optimal — he gained excess fat doing it — but it marked the definitive end of his anorexic period, because he was finally eating enough to fuel change.
This is the core lesson Rob now teaches every client — including those referred to him directly by psychiatrists for clinically diagnosed anorexia. Chronic undereating does not produce the lean, muscular body you're picturing. Instead, your body shifts into a protective state: it prioritizes holding onto stored body fat while breaking down and failing to repair muscle tissue, because it isn't getting the material (protein) or fuel (carbohydrates and fats) it needs to do otherwise.
The visible result, which Rob has seen repeatedly in both personal experience and client work, is a body that gets lighter on the scale but stays soft in specific stubborn spots — the inner thighs, lower back, the fold under the glutes, the pooch under the belly button, under the armpits. The longer someone undereats, the more muscle and bone density they lose, while those fat pockets persist. You lose weight, but almost none of it is the fat you actually wanted gone.
Rob's current recommendations, refined across 3,000+ clients:
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Q: Why doesn't undereating lead to fat loss the way most people expect?
Chronic undereating pushes your body into a protective state where it prioritizes holding onto stored body fat while breaking down muscle tissue for energy instead. Without adequate protein and fuel, your body has no material to build or maintain lean tissue, so you lose weight overall while stubborn fat pockets — thighs, lower back, glute folds — often remain unchanged.
Q: How much protein do I actually need to build muscle?
Rob recommends 1.0 to 1.2 grams of protein per pound of lean body weight if you're lifting weights and trying to build muscle, calculated off your leaner target weight rather than your current weight if you're carrying excess body fat. This range consistently works across bodybuilders, powerlifters, and general clients in his coaching practice.
Q: Do carbohydrates actually make you gain fat?
No — carbohydrates and fats together are your energy nutrients, and fat gain only occurs when total energy intake chronically exceeds what your body uses, not from carbs specifically. Carbohydrates are essential fuel that allow the protein you eat to actually be converted into muscle tissue.
Q: What are the physical signs someone is chronically undereating?
Look for persistent soft pockets of fat in specific areas — the inner thighs, lower back, under the glutes, under the belly button, or under the armpits — that don't improve even as overall body weight continues dropping. This pattern signals muscle loss and fat retention happening simultaneously, the opposite of healthy fat loss.
Q: How do I calculate my true maintenance calories?
Use a BMR calculator (Rob recommends calculator.net) to find your basal metabolic rate, then treat that number as roughly 70% of your actual total daily energy needs as a starting estimate. From there, track your body's real-world response over a few weeks and adjust up or down based on results.
Q: Can someone recover from disordered eating patterns and still build an elite physique?
Absolutely — Rob himself went from a 165-pound "skinny fat" anorexic teenager to competing in strongman at 300 pounds and now sits at 265 pounds with visible ab definition, working toward a bodybuilding show. Recovery and elite-level physique goals aren't mutually exclusive; they require rebuilding your relationship with food and training around fueling rather than punishment.
Rob's 2.5 years with anorexia weren't just a personal struggle — they became the foundation of everything he now teaches about nutrition and body composition. The core insight is simple but counterintuitive if you've never lived it: your body cannot build the physique you want from restriction alone. It needs protein as material, carbohydrates and fats as fuel, and a genuine caloric baseline it can trust before it will let go of stored fat and build lean muscle.
If any part of Rob's story — the self-punishment, the belief that starving yourself equals progress, the frustration of training hard with nothing to show for it — sounds familiar, that's your sign to stop guessing and get real guidance. You don't need three wasted years to figure this out. You need the right numbers, the right approach, and someone who's actually been where you are.
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If today's episode resonated with you, imagine having this level of guidance personalized to your exact goals, schedule, and body. That's what working with Rob looks like.
Hear Rob tell this story in his own words — the full emotional weight of it, the specific details of those punishing workouts, and the exact moment everything shifted — in 2345 - What I Learned From Being Anorexic for 2.5 Years.