Kickboxing Star Reveals Secrets Behind Shredded Legs Ahead of ONE Fight Night 41

Thai star Suablack is one of the most visually striking athletes on the ONE Championship roster, and the muscle-bound flyweight has opened up about exactly how his legs got that way.

The 29-year-old faces undefeated Japanese sensation Hyu Iwata in a flyweight kickboxing matchup at ONE Fight Night 41: Sinsamut vs. Jarvis on Friday, March 13, live in U.S. primetime from Lumpinee Stadium in Bangkok, Thailand.

Suablack arrives at flyweight fresh from a division switch, having moved down from bantamweight in search of a new beginning. Standing across from him is Hyu, a 23-year-old karate stylist from Japan who holds a flawless 12-0 record and has stopped his last three opponents inside the distance.

Thai Sensation Traces His Powerful Legs Back to Mountain Roots

Suablack’s physique has turned heads across the combat sports world, but the story behind it stretches well beyond the gym. The Thai striker grew up in the mountains, and the natural demands of that environment laid the groundwork for the remarkable lower body strength that fans see today.

“I grew up in the mountains. My family, and most Karen people actually, naturally have big leg muscles because we’re always hiking up and down the hills. But since I’m a pro fighter and I’m a total gym rat, my muscles have become even more defined and stand out,” Suablack said.

Eight promotional victories and decades of professional competition have sharpened everything nature provided. Suablack’s move to flyweight is built on the belief that his speed, power, and technical skills will remain fully intact at the lower weight, and his background suggests he has the physical foundation to back that confidence up.

Suablack’s Blends Weights, Bodyweight Work, and Cardio

The genetic advantage Suablack carries into the gym is only part of the story. His weekly training regimen reflects a deliberate, structured approach to building muscle endurance without sacrificing the leanness and conditioning that combat sports demand.

“My secret is combining weight training with bodyweight exercises about three to five times a week. I don’t go super heavy. Instead, I focus on high reps to build endurance. I also do plenty of cardio – running alongside my boxing drills – to keep the muscles as lean as possible,” he explained.

Suablack will need every ounce of that conditioning when he faces Hyu, who has compiled a spotless 12-0 career record and knocked out his last three opponents. A win over a battle-tested veteran like Suablack could propel him toward the top names in the flyweight kickboxing division.

Fight Camp Diet and Recovery Fuel His Physical Peak

The final piece of Suablack’s preparation puzzle is what happens away from the training room floor. When a fight is on the horizon, the Thai striker tightens his nutrition around a high-protein, clean-eating framework that is designed to protect the muscle mass he has spent years building. Recovery, he noted, is treated as seriously as the training itself.

“When I’m in camp, I switch to clean eating and take two scoops of whey protein a day. I aim for about 1.5 to 2 grams of protein per kilogram of body weight to maintain my muscle mass, and I make sure to get plenty of sleep,” Suablack said.

The discipline that underpins that approach is the same discipline that produced a 62-22 career record and eight ONE Championship victories across multiple weight classes.

ONE Fight Night 41 airs live on Prime Video on Friday, March 13. The action begins at 8 p.m. ET/5 p.m. PT. The event is free for all Amazon Prime subscribers in the U.S. and Canada. It also features a ONE Welterweight Submission Grappling World Championship match between defending titleholder Tye Ruotolo and Polish challenger Pawel Jaworski.