History
Our Story
From a modest group of 10-15 ladies, Champions Gym has blossomed into Western Australia’s most diverse community, boasting 3 clubs, 26 dedicated staff, and nearly 1000 members. In a decade, our transformative coaching, leadership, and inclusive ethos have empowered thousands. With over 14 championships, including state, national and world championships, our impact is undeniable. Each day we aim to Build Better People. Our mission, is simple: Reignite passion for health and fitness through dynamic martial arts.
Meet the team
Pamorn Martdee
Born into the family business of Muay Thai, Pamorn started training at age 11, started fighting at 13, and went on to win the Australian title at 17. He attributes his success to working with some of the best in the world in his own career as a fighter, but later as a coach and mentor. What originally started as a need to build confidence, and self-defense has grown into his life’s work of coaching others to their own greatness.
Whitney Tuna
With a huge background in HR and professional development, Whitney originally took up Muay Thai for health and fitness. After meeting Pamorn at training, the pair found a common passion, and decided to share their love for coaching by opening Champions Gym. As a coach, Whitney is passionate about helping women realise their true potential, breaking down barriers and helping ladies achieve success in their own lives. As a competitor, Whitney has been ranked in the top 5 of the country, won two State championships. Whitney will make you feel like you can jump off a cliff and fly.
Loma AKA Detnarong
Coach Loma, also known as Detnarong Sitjaboon (เดชณรงค์ ศิษย์จ่าบูรณ์) started his fighting career at 7-years old, and is regarded as a national treasure. Amassing an impressive 500 fights, he is a four-time world champion winning 2x Lumpinee, Rajdamnern Stadium and Thailand Championships respectively. Today, he thrives in the gym, bringing an infectious smile, hunger to better his students, a drive to share his experience and passion for the fighting arts passing on the gifts that helped him succeed.
Coach Loma is a visiting coach from Yodyut Muay Thai in Koh Samui.
Dina Sokol
A professional Muay Thai fighter for over five years, Dina has competed in Thailand and all over Australia winning the WKA State title. After a career of competing, Dina became a Mum, changing her career from competing to coaching, exploring the world of Strength & Conditioning. After an 8-year hiatus, Dina set herself an overzealous goal of returning to the ring, winning in impressive fashion… Dina not only what it takes to win in the ring, but how important it is to maintain family, personal, and work life to ensure balance for everyday fulfillment.
Rikki Vallance
Born and raised in Scotland, Rikki found himself in the gym as a teenager. After getting into trouble and having too much energy, he was introduced to Muay Thai. Finding a passion for challenging himself, Rikki then found himself competing, and after seven years, fell in love with coaching, becoming certified in fitness, leading group and personal fitness classes. Rikki is quietly spoken but is passionate about bringing out the best in whoever he works with.
Erica Sheffield
Erica found herself helping others after starting her own journey in the boxing gym as one of very few ladies. A representative for Western Australia at the Australian Boxing Championships, Erica has fought competitively against some of the nation’s best. Erica really enjoys helping people along their journey, sharing her own experiences, bringing energy, and flare to her classes!
What you can expect on your first visit
Our team recognise that starting something new can be super-daunting. We still remember our first session like it was yesterday, so we know better than anyone how scary it can be. Our job is to relieve any, and all uncertainty, break down the barriers, and make it as easy as it can be when it comes to making the start. The first step is always the hardest…

We’ll help you find a program that fits your goals & your lifestyle.
Talk to a coach to learn more about which program could benefit you and your goals.