He Lost 75 Pounds While Working 80-Hour Weeks – These 12 Fat-Loss Habits Made It Possible Without Cardio Marathons or Chicken Broccoli Misery

If you’re trying to lose weight and keep it off, you’ve probably been told to focus on grilled chicken, steamed broccoli, and grinding it out with hours of cardio.

But if you’ve tried that before, you know it’s not sustainable – especially with a demanding job or busy life.

Dr. John Go, an ophthalmologist based in Los Angeles, lost 75 pounds, stays under 12% body fat year-round, and does it all while working 80-hour weeks.

In his latest video, he shares his 12 most important evidence-backed habits that make fat loss and maintenance possible — without sacrificing your life or schedule.

From fat-burning walks to muscle-building training, food tracking hacks, and restaurant flexibility, these tips are practical, sustainable, and proven to work — even for the busiest professionals.

Here’s how he did it, and how you can too.

1. Walk More, Do Less Cardio

Walking is one of the most underrated tools for fat loss.

Unlike intense cardio sessions, walking doesn’t spike hunger hormones like ghrelin. That means you’re not likely to binge afterward — which often happens after HIIT or long runs.

“After a tough cardio session, your hunger spikes and your fitness tracker tells you that you burned 1,000 calories — which is usually inaccurate,” Dr. Go explains. “That’s when the ice cream comes out.”

Walking burns calories steadily, without triggering rebound hunger. It’s easier to stick with daily, and easier on the joints, making it perfect for long-term success.

Dr. Go’s favorite hack? A treadmill desk.

“I hit 20,000 steps while charting patient notes or editing videos,” he says. But even without a treadmill, aim for 8,000–10,000 steps per day. Take the stairs, park farther away, and go for post-lunch walks.”

This keeps you in a gentle calorie deficit — no willpower, no crash diets.

2. Build as Much Muscle as Possible

Muscle increases your basal metabolic rate — the calories you burn at rest.

“Think of muscle like passive income,” says Dr. Go. “The more you have, the more you can eat and still lose weight.”

Focus on compound lifts like:

• Squats
• Deadlifts
• Bench presses
• Barbell rows

These moves target multiple muscle groups, giving maximum results in minimal time — perfect for busy schedules. Muscle isn’t just for aesthetics. More lean mass protects against insulin resistance, osteoporosis, and even increases lifespan.

Lifting makes your body more metabolically efficient — and that makes fat loss far easier in the long term.

3. Track Calories Like You Budget Money

“Most fat gain is just energy mismanagement,” Dr. Go says. “Fat is stored excess energy.”

One of the main reasons people fail to lose weight is underestimating how much they eat. Sauces, oils, even extra bites add up quickly if you’re not careful.

Dr. Go recommends tracking every meal, especially early on. “If you’re not sure, overestimate,” he says. “And learn what actual servings look like.”

Example: one serving of peanut butter (2 tbsp) is 200 calories. A “heaping” spoon might be 300+ without realizing it.

Once you adopt food tracking, it becomes easier to recognize patterns — and update your approach when necessary.

4. Stick to the 80/20 Rule – Consistency Beats Perfection

“Trying to be perfect? That’s the fastest track to burning out,” says Dr. Go.

Instead, aim for progress 80% of the time. Let 20% of your meals be flexible.

Dr. Go follows a strict regimen during the workweek, but enjoys things like dim sum and KBBQ on weekends. “That’s how I keep my sanity — and stick with the plan long term.”

On tough days, he opts for short 15-minute workouts rather than skipping altogether. This helps build momentum and avoids falling into the common guilt spiral that often follows missed sessions.

5. Prioritize Protein

Each meal should include 30–50g of protein to support muscle retention and manage hunger.

“Protein is your secret weapon,” Dr. Go says. “It keeps you full, boosts metabolism, and helps you build muscle.”

Compared to carbs and fats, protein takes more energy to digest and has a stronger satiating effect.

Prioritize whole protein sources like:

• Chicken breast
• Lean beef
• Greek yogurt
• Fish
• Protein powders

High-protein meals reduce cravings and help manage your calorie intake naturally.

6. Don’t Drink Your Calories

Sugary drinks — like sodas, juices, boba, frappuccinos, and alcohol — are diet killers.

“Your brain doesn’t recognize liquid calories the way it does whole food,” Dr. Go warns. “And they don’t fill you up.”

Instead, aim for zero-calorie drink options:

• Water (plain or sparkling)
• Black coffee
• Unsweetened tea
• Diet soda (in moderation)

Swapping one Frappuccino (660 cal) for a protein meal (500 cal, 50g protein) is a massive upgrade for satiety and progress.

7. Master Hunger Cues

“If hunger isn’t the problem, food isn’t the solution,” says Dr. Go.

Next time you think you’re hungry, ask: Am I truly hungry, or am I angry, lonely, tired, or bored?

If it’s anything but true hunger, address that need directly. Over time, learning to ride out mild hunger — not confuse it with starvation — becomes a fat loss superpower.

Hunger is often a natural sign that your body is tapping into stored fat. That’s a good thing — not a signal to panic and eat.

8. Skip the Nightcap

Alcohol slows down fat loss and affects metabolism in multiple ways:

• Stops fat burning – your body prioritizes removing alcohol before burning food
• Lowers inhibitions – increases binge risks
• Interrupts sleep – disrupts recovery and increases cravings
• Lowers testosterone – which reduces muscle growth and maintenance

“Cutting back on alcohol improved my sleep, focus, and fat loss — almost overnight,” Dr. Go says.

Even 1–2 drinks can significantly derail progress. If you want to maximize results and feel better, reducing or eliminating alcohol makes a huge impact.

9. Hack Your Ingredients

Small swaps in your daily meals can yield big calorie savings — without sacrificing flavor.

Ingredient hacks Dr. Go suggests:

• Cauliflower rice instead of white rice
• Keto bread or low-cal tortillas instead of regular ones
• 99% lean turkey instead of 80/20 ground beef
• Greek yogurt instead of sour cream

Swapping just one ingredient can turn a 700-calorie meal into a 450-calorie one — fat loss without the FOMO.

10. Monitor Weekly Progress, Not Daily Weigh-Ins

Daily weight fluctuations are normal. Focus on the weekly weight trend instead.

Take your morning weight each day, average it at the end of the week, and compare across weeks.

“Use tools like ChatGPT,” says Dr. Go. “You can input your data and get smart suggestions for tweaks.”

This prevents emotional decision-making, and ensures slow but steady progress.

11. Plan Tomorrow Tonight

When you’re tired, you’ll default to what’s easy — and that’s rarely healthy food.

“That’s why automation beats willpower,” Dr. Go says.

Strategies that work:

• Meal prep high-protein meals ahead of time
• Schedule workouts into your calendar
• Pack healthy snacks so they’re easy to grab

Having a plan ahead of time makes it easier to stay on track when life gets messy.

12. Just Be 1% Better Than Yesterday

Forget perfection. Focus on improvement.

“You don’t need to change everything overnight,” says Dr. Go. “But if you get 1% better today, and again tomorrow, it adds up.”

Celebrate small wins. One more walk. A better lunch. A skipped latte. It all stacks up.

It’s those small, consistent actions that create lasting transformation.

Final Thoughts

These 12 habits helped Dr. John Go drop 75 pounds, stay lean, and do it all while managing an 80-hour workweek.

The secret isn’t grinding harder — it’s building smart systems that fit into your life.

Whether you’re a busy professional, a student, or a parent on the go, these evidence-based steps can help you lose weight, keep it off, and enjoy life in the process.

You don’t have to sacrifice your schedule, your career, or your cravings. You just need a system that works — and now, you’ve got one.