KRU YUKI "BOSS" YAMANAKA

Yuki began his Martial Arts journey at the age of 7 when he joined a Karate school, and 11 years later he earned his 2ND degree Black Belt. He started his Muay Thai journey at the age of 22 while specializing in Structural Engineering at Carleton University.

Since 2013, Yuki has entered the ring over 30 times and has competed all over the world, representing Team Canada in the 2014 and 2016 World Championships. His competitive career has taken him across Ontario, Western Canada, the United States, Mexico, Italy and Thailand.

He earned his Kru certification (meaning ‘teacher’ in Thai) under Kru Jeff Harrison, presented by Ajahn Burklerk Pinsinchai (record of 172-6), a living legend in Thailand during the Golden Era of Muay Thai.

Kru Yuki has cornered fighters in a variety of events— from exhibition matches to sanctioned competitions, including one of the largest professional organizations in the world: Glory World Kickboxing Series. He can also be seen Officiating at provincial events where he judges and referees sanctioned amateur bouts under MTO.


As Head Muay Thai Instructor, Kru Yuki is excited to share his passion and knowledge of Muay Thai— the Science of 8 Limbs— to the people of Kemptville, of all ages, inside and outside of the gym.

Throwdown in O-Town Championship bout, Ottawa, 2015
Journey Fight League, Alberta, 2016
WKF World Championships, Italy, 2016
Toronto, 2017
Ottawa, 2018

YUKI YAMANAKA'S MUAY THAI HISTORY

  • 2014 WMO World Championships in Ayutthaya, Thailand – SILVER MEDALIST
  • 2014 TBA Classic Super Middleweight - B Class BRONZE MEDALIST
  • 2015 WKF KINGS CUP 155lbs CHAMPION
  • 2015 WKF 155lbs THROWDOWN OTTAWA CHAMPION
  • 2016 WKF Canadian National Championships – SILVER MEDALIST
  • 2016 WKF World Championships (Andria, Italy) – BRONZE MEDALIST
  • 2017 Muay Thai Canada (MTC) 71kg 4-man Tournament – 2ND Place
  • 2018 WKA 147lbs Canadian Title Contender
  • 1-0 Professional Record (Chiang Mai, Thailand)

COACH KHRIS COLLINS

A Kemptville native born-and-raised, Khris has been involved in sports and weight training for his entire life— from hockey and soccer at age 5 to sneaking into the gym at 13.

Khris has been a Muay Thai coach and athletic trainer to recreational athletes and  competitive fighters since 2016. He is a certified Canfitpro personal training specialist along with being Eat Clean Nutrition certified under Canfitpro as well.

Keeping it simple, straightforward and effective: this is how Khris helps to develop Boss Fitness’s athletes and clients. Whether you have an important event coming up that you are trying to look your best for, or you have the competition of your career on the horizon, his training methods will get you to your goals.

Be it a challenge in strength, weight loss or athletic performance— Coach Khris guarantees your success. Walk
into our gym with goals and the will to attain them, and he can show you how to get there.