The Day I Became an IRONMAN: Conquering 113KM of the Limits of Pain and Human Endurance

Reflecting on the extraordinary journey to becoming an IRONMAN fills me with immense pride. This pivotal moment, the culmination of months of unwavering dedication and resilience, stands as a true testament to the power of mind and body.

Figure 1: This is more than just a certificate — it’s the embodiment of years of sweat, sacrifice, and perseverance. The IRONMAN 70.3 Finisher certificate will forever hold a special place in my heart. After all the doubts, the training, the struggles, this moment was a dream realized. In that instant, I was no longer just a triathlete; I was an IRONMAN. Can you imagine the feeling? There's nothing like it. This is the pride of my life.
Swim 2.4 miles.
— IRONMAN Triathlon (@IRONMANtri) August 24, 2019
Bike 112 miles.
Run 26.2 miles.
Brag for the rest of your life.#AnythingIsPossible pic.twitter.com/qnjX29bvdN
The Starting Line
As I stood at the starting point of the 2024 IRONMAN 70.3 Bangsaen in Thailand, surrounded by breathtaking coastal scenery, a wave of anticipation and apprehension washed over me. The challenge ahead was daunting, yet exhilarating.
The Race Breakdown
The triathlon comprised three grueling segments:
- 🏊♂️ 1.9km (1.2-mile) swim to kick off the journey.
- 🚴♂️ 90km (56-mile) bike ride through scenic routes.
- 🏃♂️ 21.1km (13.1-mile) run that pushed me to my absolute limits.

Figure 2: The first challenge: a 1.9 km open-water swim in the rough sea at Bangsaen Beach. The waves were fierce, the crowd was intense, and the physical toll was real. But in those moments, I felt alive. The sting of saltwater in my eyes, the struggle to find a rhythm, the jostling of other swimmers — it was all part of the experience. And despite being kicked in the chest by another athlete and the panic of overcrowded waters, I kept pushing. 56 minutes might not seem fast, but to me, it was a victory. It was the first step toward my dream, and I made it count.

Figure 3: From swim to bike: the transition that felt like a breath of fresh air. As I climbed out of the water and rushed toward the bike, I was met by an unexpected surprise — Thai celebrity Tao Somchai Khemglad! I was starstruck, honestly. But in that moment, everything seemed to fall into place. A moment of connection, a fleeting encounter with someone who’s made a name in Thai culture, and here I was, sharing the same course. It was one of those little joys that made the whole race feel even more special.

Figure 4: The second challenge: a 90 km bike ride through the beautiful yet demanding roads of Chonburi. The sun was scorching, and every pedal stroke felt heavier as the kilometers piled on. But there was no turning back. This was the moment where strategy met endurance. I pushed through, determined to finish strong. Every climb felt like a test, but every descent was a reward. The entire bike course was a dance between effort and relief.

Figure 5: A glimpse of the bike ride, around the 50 km mark. Still going strong, but the real challenge was ahead. My legs burned, but my mind stayed focused. This was where the race truly began — endurance versus fatigue, willpower versus doubt. At this point, it wasn’t about speed; it was about finishing strong, pushing through every obstacle. And I was ready.

Figure 6: The final 21.1 km run — the moment when everything I had worked for came to a head. The energy from the crowd, the rush of adrenaline, and the overwhelming sense of accomplishment made every step feel light. Crossing that finish line wasn’t just about completing a race; it was about fulfilling a dream. It was the moment I could finally call myself an IRONMAN.
Together, these segments totaled an astounding 113km (70.3 miles) of relentless determination.

Figure 7: A snapshot of my Garmin Fenix watch GPS during the 90 km bike ride. It tracks every turn, every climb, every moment of struggle. I used this data to monitor my pace and keep myself on track, reminding me that every kilometer was one step closer to victory. Technology isn’t just a tool; it’s a companion in moments like these, keeping me grounded and focused.

Figure 8: From bike to run: the transition to the 21.1 km half marathon. My Garmin tracked every stride as I pushed forward. This part of the race felt endless, but also exhilarating. Every step was a reminder that the finish line was within reach. This was the final challenge — the test of all the training, the pain, the sacrifices. This was my moment to shine.
The Journey
The road to IRONMAN 70.3 Bangsaen was filled with challenges. Each stroke, pedal, and stride pushed me beyond my comfort zone. Moments of doubt and exhaustion tested my resolve, yet each obstacle revealed a reservoir of inner strength I never knew existed.

Figure 9: Crossing that finish line in 7 hours and 51 minutes was more than just a time on a clock — it was a declaration that I had gone further than I ever imagined. The cut-off was 8:30, and to be honest, I wasn’t even sure I could break 8 hours. But there I was, pushing beyond my limits and proving to myself that anything is possible. The feeling when you surpass your own expectations? Unreal. The joy and relief that flooded over me as I crossed that line — words can’t even come close to describing it.

Figure 10: BIB number 201 — a number that will forever be etched in my memory. It’s amazing how something as simple as a number can carry so much meaning. It represents the start of a new chapter, the challenge ahead, and the person I became along the way. At that moment, I didn’t just wear a number, I wore my determination, my discipline, and my belief in myself. That was my identity for the race, and it’s a number I’ll carry with me forever.
The unwavering support of the event staff and my fellow athletes played a pivotal role. Their encouragement and camaraderie fueled my determination and reminded me I wasn’t alone on this journey.
The Finish Line
Crossing the finish line after 7.51 hours was a moment of indescribable joy, relief, and pride. Just moments before the 8.30-hour cutoff, I officially earned the title of IRONMAN 70.3 finisher. It wasn’t just about completing a race; it was about embracing the challenges and pushing beyond my perceived limits.

Figure 11: The IRONMAN 70.3 Finisher certificate — not just a piece of paper, but a symbol of everything I put into this journey. Each glance at it takes me back to the early mornings, the late nights, the sacrifices, the pain, and the incredible sense of achievement that followed. This certificate isn’t just proof of completion — it’s a reminder that with enough commitment and grit, anything is possible. It’s a constant reflection of my strength, my perseverance, and the rewards that come from pushing beyond the limits.
Gear and Conditions
Equipped with my MERIDA SCULTURA bike and NIKE Zoom Fly 5 shoes, I faced the scorching midday sun, which intensified the already demanding race. Despite the fatigue and heat, sheer determination propelled me forward.

Figure 12: My trusty Merida Scultura 4000, the bike that took me through 90 km of challenge. Bought second-hand for this purpose, this bike became a symbol of resourcefulness and resilience. It carried me through both IRONMAN 70.3 and Laguna Phuket Triathlon, and I wouldn’t have had it any other way. It’s more than just a machine — it’s a partner in my journey.
Gratitude
This achievement would not have been possible without the tireless efforts of the IM70.3 Bangsaen organizers and staff. Their support made this dream a reality, and I am deeply grateful.

Figure 13: Here are the numbers that tell the story: the official IRONMAN 70.3 race stats. These aren’t just data points. They’re the moments that define who I am as an athlete. Every second of this race, every split time, tells the story of my resilience, my strategy, and the grit it took to keep going. These stats are proof of what can be accomplished when you push past your comfort zone, when you face adversity, and when you never, ever give up.
Lessons Learned
Becoming an IRONMAN wasn’t just a physical feat—it was a testament to perseverance and the resilience of the human spirit. Through this journey, I’ve learned that true strength is discovered in the face of adversity.
To anyone pursuing a seemingly insurmountable dream, believe in yourself and embrace the challenges. It is through perseverance and determination that dreams transform into reality.

Figure 14: Achieving a VO2 max score of 55 — a testament to the relentless effort I’ve put into my training. This number isn’t just a figure; it represents hours of hard work, dedication, and pushing my body to its absolute limits. It’s more than just an improvement in physical performance — it’s a breakthrough in my endurance, my commitment, and my journey toward being the best version of myself. This is just the beginning. The hard work pays off, and the future looks limitless.
The Celebration
After crossing the finish line, I rewarded myself with a well-deserved feast of Japanese food and sushi—a delicious acknowledgment of the physical and mental endurance the race demanded.

Figure 15: Both my IRONMAN 70.3 and Laguna Phuket Triathlon finisher medals proudly displayed on my desk. Every time I look at them, I remember the intense training, the sweat, and the relentless pursuit of greatness. They remind me that all the hard work paid off. These medals aren’t just awards; they’re my story, etched in metal.
Final Thoughts
The happiness I find in this journey lies not just in the end goal but in the process itself—the struggles, triumphs, and growth along the way. To anyone considering a challenging path, embrace it wholeheartedly. Trust in the transformative power of hard work and dedication. In the pursuit of excellence, we find joy and fulfillment that words cannot capture.
With immense gratitude and pride, I declare: I am an IRONMAN.
PS. The year began with completing the IM70.3 and ended with crossing the finish line at the Laguna Triathlon in Phuket, which included a 1.8K swim, a 55K bike ride, and a 12K run. Truly, it was a year defined by triathlons for me.
As I reflect on this experience, I feel immense gratitude—for the beauty of Phuket, the camaraderie of my fellow athletes, and the personal growth this race has inspired. The Laguna Phuket Triathlon is more than just an event; it’s a celebration of human spirit and perseverance.
To anyone considering a triathlon, my advice is simple: go for it. Embrace the challenge, trust your training, and don’t forget to enjoy the ride. Whether you’re a seasoned athlete or a first-timer like me, the journey will leave you stronger, wiser, and more fulfilled.

Figure 16: Two medals that mean the world to me: IRONMAN 70.3 and Laguna Phuket Triathlon. These aren’t just awards, they’re symbols of my journey through some of the toughest courses in the country. IRONMAN 70.3 was a challenge in itself, but add the Laguna Phuket Triathlon — one of the most grueling events in Thailand — and it feels like I’ve conquered my own personal Everest. Holding these medals in my hand, knowing that I’ve triumphed in both, is one of the most fulfilling moments of my life. These aren’t just race medals; they are the manifestation of my unrelenting dedication and perseverance.

Figure 17: The international athletes who surrounded me at Laguna Phuket Triathlon. Seeing so many passionate and skilled athletes from around the world only fueled my determination to finish. It was an honor to race alongside such incredible talent.

Figure 18: The Laguna Phuket Triathlon Finisher certificate — another incredible achievement in my journey. This race, one of the most difficult in Thailand, pushed me to my limits. But crossing that finish line made all the struggle worth it. I am a triathlete. I am a finisher.

Figure 19: Official Laguna Phuket Triathlon result — this one’s going to stay with me forever. It’s a testament to the countless hours of training, the dedication, and the willpower it took to finish this legendary race.

Figure 20: My BIB number 316 at Laguna Phuket Triathlon. A number that holds memories of every pedal stroke, every step, and every breath during the race. It’s my personal marker, and I’ll carry it with pride.

Figure 21: The official results from Laguna Phuket Triathlon, now immortalized online. Seeing my name in the official rankings was a moment of deep satisfaction. It was the confirmation of what I knew all along.

Figure 22: My official Laguna Phuket Triathlon finisher certificate, proudly displayed on the official website. This digital version still carries the same weight as the physical one — both represent a triumph over adversity.
Completing the IRONMAN 70.3 and Laguna Phuket Triathlon was more than just a series of races — it was a journey that tested my limits, reshaped my understanding of endurance, and ultimately redefined what I thought was possible. From the very first moment I registered for these events, I knew they would be life-changing. The training was intense, pushing my body to its physical limits while demanding an unwavering mental focus. Each early morning, every grueling workout, and the sacrifices made along the way were all driven by a single goal: to prove to myself that I could conquer these seemingly insurmountable challenges. When I crossed the finish line of IRONMAN 70.3 in 7 hours and 51 minutes, well below the cut-off, it was the culmination of months of hard work, sweat, and self-doubt. That moment, when I held my finisher medal and looked at my race number — 201 — I realized it wasn’t just a race I had completed; it was a transformation. Every mile of the 1.9 km swim, each moment on the 90 km bike ride, and the final 21.1 km run were stepping stones toward the person I had become — someone capable of achieving the extraordinary.
But the journey didn’t stop there. Completing the Laguna Phuket Triathlon, one of Thailand’s most demanding races, felt like the perfect bookend to this chapter of my athletic journey. The Laguna Phuket Triathlon pushed me even further, not just physically but emotionally. It was an experience that tested my resilience, focus, and determination like never before. Holding both the IRONMAN 70.3 and Laguna Phuket finisher medals together wasn’t just about the victories — it was about the strength, grit, and perseverance required to reach the finish lines of both. These medals symbolize far more than athletic achievement; they are a reflection of everything I’ve learned about myself. They are reminders of the moments I wanted to quit but didn’t, the times my body screamed in protest but my mind pushed through anyway. And above all, they represent the belief that anything is possible if you stay committed to the journey. My journey to becoming an IRONMAN and conquering the Laguna Phuket Triathlon has been one of the most rewarding chapters of my life — a story of endurance, triumph, and the incredible power of the human spirit.
Catch you at the next finish line 🏁✨,
Kao
#IRONMAN703 #IRONMAN #IRONMANtri #Triathlon #AnythingIsPossible
Citation
Panboonyuen, Teerapong. (Feb 2024). The Day I Became an IRONMAN: Conquering 113KM of the Limits of Pain and Human Endurance. Blog post on Kao Panboonyuen. https://kaopanboonyuen.github.io/blog/2024-02-21-the-day-I-became-an-IRONMAN/
For a BibTeX citation:
@article{panboonyuen2024ironman,
title = "The Day I Became an IRONMAN: Conquering 113KM of the Limits of Pain and Human Endurance",
author = "Panboonyuen, Teerapong",
journal = "kaopanboonyuen.github.io/",
year = "2024",
month = "Feb",
url = "https://kaopanboonyuen.github.io/blog/2024-02-21-the-day-I-became-an-IRONMAN/"}