How I Lost 30kg Without a Gym: Realistic Weight Loss Lessons
Thirty kilograms. That is roughly the weight of a 10-year-old child.
For almost two years, I carried that extra weight around with me every single day. The wildest part of it all? I barely even noticed it sneaking up on me.
I'm Xuan Bach Mai, a 23-year-old Vietnamese guy who went from nearly 100kg to losing 30kg while studying abroad in Australia. This isn't a story about a perfect routine, a fancy diet program, or an expensive personal trainer. This is the messy, honest truth of how I completely transformed my body and mind after moving from Vietnam to Australia to study.
If you are currently standing where I used to stand, stressed, heavier than you want to be, and entirely unsure of how to lose weight without a gym membership, then this one is for you.
The short version: I gained most of the weight between 2021 and 2022 during COVID and a stressful startup job in Vietnam. I moved to Australia to study in early 2023, lost 7kg by the end of that year just by cooking for myself and playing table tennis, then dropped another 18kg through 2024 with intermittent fasting and a lot of grinding. By mid 2025, the total hit 30kg. No gym. No trainer. No perfect plan.
The Slow Creep: How Stress and Lifestyle Cause Weight Gain
Nov 2021 - End of COVID lockdown, before start working
It didn't happen overnight. Weight gain never does. Instead, my life became a perfect storm of stress, survival, and culture.
It started when the second COVID lockdown hit Vietnam. Suddenly, I was trapped inside with endless free time and a kitchen that was always just a few steps away. After finishing my first year of university, I took a gap year. Not long after the world opened back up, I threw myself into a high-tempo tech startup in late 2021. That brought a whole new wave of chaos: late nights, relentless deadlines, and intense pressure.
In Vietnamese professional culture, bonding with your team usually revolves around one thing: beer. You celebrate over beer, you decompress after a brutal shift over beer, and you build relationships over endless glasses of bia hơi.
By the time someone snapped a photo of me at the beach, just four months into the job, the changes were already locking in. And the scale just kept climbing.
Feb 2022 - Just 4 months in, the weight was already showing
Combined with the late hours, junk food quickly became my ultimate comfort. If I had a bad day at work, I would grab something fried. If a major deadline was looming, I would order delivery. To be completely honest, I was eating a lot of fast food back then. I still vividly remember my absolute favorite thing to eat late at night: a heavy plate of deep-fried chicken rice. I wasn't eating because my body needed fuel; I was eating because the world felt heavy, and that greasy food was the only thing buffering the stress.
Aug 2022 - Thailand event, near peak weight
The Mirror's Illusion: Why We Don't Notice Weight Gain
My family noticed the changes long before I did. They told me I looked heavy. They gently suggested that I needed to lose weight. Like most people in that situation, I just brushed it off. You know how it is with family; they always have something to say, so it is easy to tune it out as background noise.
The family always knew before I did
But they were completely right. I just genuinely couldn't see it.
When you gain weight gradually, your brain plays a trick on you. You look at yourself in the mirror every single morning. Because the daily change is microscopic, your mind adjusts to the new normal. The transformation sneaks up on you in the shadows, one quiet day at a time.
After a year and a half of constant hustle, I left the startup and began preparing my paperwork to study abroad. My mind was entirely consumed by new chapters, visas, and future opportunities. I wasn't thinking about my health or what I looked like.
It took landing on a completely different continent for reality to finally break through.
Australia: An Accidental Reset in Diet and Lifestyle
In February 2023, I arrived in Australia to continue my bachelor's degree. One of the first people to greet me was anh John, a friend of my sister's who had been living here for years. On my very first days in the country, he took me out for dinner to welcome me properly.
Early 2023 - Anh John took me out for dinner. C'est la vie.
When I saw the photo he took that night, something shifted inside me. There was no way to brush it off this time: no family nagging to tune out, no mirror trick to soften the blow. I was in a completely new place, surrounded by no one who knew the old me, staring at a stranger in a photo I was supposed to be in. I looked at myself and realized that things had to change immediately.
Feb 2023 - Western Sydney University, a few weeks later. Still the same person, but something had already clicked.
I didn't start with a grand master plan. Instead, moving across the world forced an accidental health reset through two major lifestyle shifts.
First, living alone meant I had to buy my own groceries and cook for myself for the very first time. The effortless, late-night delivery apps from back home were gone. Even though I was still eating decent portions, the food was naturally cleaner. I also started playing table tennis in my student accommodation.
2023 - The dorm table tennis table that started it all
Walking was the silent factor nobody talks about. Back in Vietnam, I hopped on a motorbike for everything. In Australia, I walked to the grocery store, walked to campus, walked to the bus stop. My body was clocking over 5,000 steps a day without a single "workout" planned around it. The environment just made movement the default.
My 2023 step count. Without realising it, I was simply moving a lot more.
That was the entire strategy. There was no gym membership and no obsessive calorie counting. I was just cooking real food, eating a little bit less, and running around a ping-pong table a few times a week.
It wasn't an easy year. At one point, the pressure of university and the ache of being away from home got so heavy that I just shaved all my hair off. Sometimes, mental stress manifests in physical ways.
Mid 2023 - Sometimes stress comes out in unexpected ways
But I kept showing up. By the end of 2023, I had lost around 7kg. It was slow, but it was real progress.
Nov 2023 - 7kg down, confidence starting to return
Locking In: My 16:8 Intermittent Fasting Experience
Before I dive into how intense 2024 became, I have to give a massive shoutout to Loc, Chuong, chị Van, and chị Nghi. At the start of the year, I moved out of the student dorms and into a house with them. They were the ones who witnessed the raw reality of this journey day by day. They saw the early meals, the late nights, and the sheer exhaustion. Having people around who actually saw the quiet daily effort made a bigger difference than I probably ever told them. 🙏
I love 30 Mason St
But outside of the house, 2024 brought a whole new level of pressure.
Graduation was looming on the horizon. I was drowning in final-year submissions, a massive capstone project, and the intense anxiety of trying to finish strong. My mental health was taking a hit. I wasn't sleeping enough, and a massive, life-altering decision was constantly weighing on my mind: Do I pack up and head back to Vietnam after graduation, or do I try to stay and pursue a master's degree?
In the middle of all that mental chaos, I decided to fully commit to losing the rest of the weight. I started the 16:8 intermittent fasting method, packing all my food into an eight-hour window and fasting for the remaining sixteen.
If I am being completely honest, it worked, but it demanded a steep price.
Because of the strict window, I was constantly hungry at night. My sleep patterns completely fell apart. I found myself restructuring my entire life just to accommodate a ticking clock, waking up later, delaying meals, and heading to bed at bizarre hours. It looks clean and manageable on a fitness blog, but when you couple it with final-year university panic and mental anxiety, it makes an already tight life feel suffocating.
May 2024 - The transformation was already very visible
I actually don't recommend the 16:8 method to most people, at least not the way I forced myself through it. My health checkups turned out fine, but the disruption to my sanity and sleep was incredibly taxing. If your life is already high-stress, adding rigid rules around when you can swallow food just piles anxiety onto anxiety.
What kept me from snapping wasn't the diet itself. It was having a target, a glimmer of hope to look forward to. And in June, the agonizing question of whether to stay or go was answered in the most incredible way possible.
Jun 2024 - The moment the "stay or go" question got answered
I opened my inbox to find an official offer and a scholarship to continue my education at UNSW for a master's degree. In that single moment, before I had even put on a graduation gown, every ounce of struggle felt justified.
By the end of 2024, I had lost another 18kg on top of the 7kg from the year before, bringing the total to 25kg. That number still feels strange to say out loud. It didn't arrive all at once, and it didn't come free. It came from a lot of early nights, a lot of hungry mornings, and a year where I was running on fumes more often than I care to admit. But I had crossed into something real. The question was whether I could hold onto it when the next chapter brought its own set of pressures, and the next chapter turned out to be harder than I expected.
2025 - life is good
The Stranger in the Cap and Gown: A Graduation to Remember
Oct 2024 - Graduation day at Western Sydney University
October 2024 arrived, bringing graduation day at Western Sydney University.
My parents boarded a flight from Vietnam to see me walk across that stage. It had been a long time since we last stood face-to-face. When I walked toward my mom, she looked right past me.
She genuinely did not recognize her own son.
It is a moment that is almost impossible to put into words. In that split second, all those agonizingly hungry nights, the broken sleep, the exam panic, and the years of self-doubt just evaporated. Seeing the shock on my mother's face made every single sacrifice completely worth it.
Life in the Master's: The Final 5kg
Aug 2024 - Sydney life
Starting the master's program at UNSW came with a completely different kind of pressure. The workload was heavier than anything I had dealt with during my bachelor's. Readings, assignments, group projects, and research piled up fast. There was barely enough time to breathe, let alone obsess over a diet.
I also moved out again. The new place was nothing like 30 Mason St. A shared kitchen with strangers, mismatched schedules, and the general chaos of not having your own space to cook properly. Meal planning became a negotiation with whoever was using the stove.
But somehow, by mid 2025, the final 5kg came off. I am not entirely sure how to explain it. My body had built up enough momentum by that point that the habits just carried themselves forward. I wasn't trying as hard as I had in 2024. I was just living, and the lifestyle I had built held the weight off for me. Thirty kilograms gone.
UNSW graduation. The people who showed up made it real.
The full master's story - the late nights, the new city, the people I met - deserves its own post. I will be writing that one soon.
The New Normal: Choosing a Healthier Lifestyle Over the Scale
End of 2025
Now
Today, I still tend to eat two meals a day, but the rigid, stressful boundaries are gone. There are no strict timers or clock-watching. My body just naturally found its rhythm, and I listened to it.
To be completely honest, I have put some weight back on recently and gotten a bit fatter, but my perspective has completely changed. I don't panic about it because I can see that my overall lifestyle is so much better and healthier than it ever used to be. The biggest transformation didn't actually happen on the scale; it happened in my mind. I care about being alive and healthy now in a way that I simply didn't understand in my early twenties. I run, I knock out push-ups, and I still play basketball and table tennis whenever I get the chance. Movement doesn't feel like a punishment or a chore anymore; it is just a fundamental part of my daily life.
I am still actively working on my mental health. Anxiety and stress don't magically vanish just because you fit into a smaller clothing size. But I have learned that moving my body, feeding it real food, and prioritizing actual sleep protects my mind far more than I ever expected.
I am 30kg lighter, a master's student at UNSW, and honestly, I am still figuring my life out day by day, but I feel a whole lot better doing it.
Real Advice: How to Maintain Weight Loss and Mental Health
I am not a fitness influencer, a certified nutritionist, or a life coach. I am just a student who had to figure this out in the trenches. Take this advice for what it is: honest truth, not expert theory.
Ditch the Perfect Plan. I started this whole journey by simply cooking my own meals and cutting back slightly. That was it. No complex macro tracking, no obsessive calorie apps. Small, sustainable habits will beat a perfect, impossible routine every single time.
Find Joy in Movement. I never stepped foot in a commercial gym during the heavy weight loss phase. I played ping-pong. Later, I added basketball, running, and home workouts. If your exercise routine feels like a prison sentence, you will quit. Find something you love doing for the fun of it, not just the calorie burn.
Fix Your Environment First. Moving to Australia completely shifted my defaults. It forced me to walk, to shop, and to cook by default. You don't have to move across the world, but look closely at what your current environment is triggering. If your counters are covered in junk food, you will eventually eat it. Design your surroundings to help you win.
Approach Fasting With Caution. Intermittent fasting got me results, but it fractured my sleep and disrupted my routine. If your life is already a pressure cooker, be very careful about adding a restrictive eating schedule. Listen to your body, do your research, and talk to a professional.
Mind and Body Are Linked. My physical weight was just a symptom of what was happening in my head. Getting physically healthier provided a massive lift, but it wasn't a magic cure for anxiety. You have to tend to your mind just as much as your physical body.
Most importantly, give yourself the gift of time. It took me an entire year just to drop those first seven kilograms. The real results live on the other side of patience. There are no real shortcuts, but I promise you: the day you look at a photo of yourself and feel a deep, genuine wave of pride, every single difficult night will make sense.
