Petchtanong Petchfergus has been fighting at the highest level for over two decades, but at 40 years old, the former ONE Bantamweight Kickboxing World Champion shows no signs of slowing down. With an incredible 359-57 professional record and more than 400 bouts under his belt, the Thai veteran is preparing for his next challenge: a high-stakes bantamweight kickboxing clash against British star Ben "The Problem" Woolliss at ONE Fight Night 43 on May 15.

While Woolliss is eight years his junior, Petchtanong has proven that age is just a number when combined with smart training and cutting-edge preparation. He captured the ONE World Title at 37, edging out Hiroki Akimoto in November 2022, and remains hungry for another title run after a competitive loss to Yuki Yoza last year. So what's the secret to his remarkable longevity? It turns out, it's all in the science.

"It started when I was around 25 or 26," Petchtanong recalls. "I kept getting leg injuries and was constantly seeing doctors. Everyone at the gym gave me different advice, and it was just a lot of conflicting opinions. Since I had just finished high school, I decided to go to university for Sports Science so I could find the answers myself." That decision changed everything.

Petchtanong earned a bachelor's degree in Sports Science from the Institute of Physical Education Samutsakorn, followed by a Master's in Public Administration from Thongsook College. He's now planning to pursue a doctorate. Along the way, he spent six years in Australia, working with a gym owner who admired his fighting style. Immersed in an environment that blended authentic striking with modern fitness systems, Petchtanong became a true fitness junkie—obsessed with maximizing every aspect of his athletic performance.

For fighters and fitness enthusiasts alike, his journey is a powerful reminder: with the right mindset and training approach, you can keep pushing your limits at any age.