• Our Story


     Improvement Warrior Coaches

    Owner/Improvement Warrior Coach


     (Mixed Locations-New Albany, Hilliard, Downtown Columbus, Dublin, Reynoldsburg)

    Hilliard & Columbus strength training group classesI've owned this business since 2007, and have literally helped 1000's of local Columbus residents just like you get in the best shape of their life, get healthier, and look better naked!

    The total amount of weight, inches and unwanted body fat is in the tens of thousands and it keeps growing every week!

    Decide to be the Improvement Warrior and watch your life change!

    Jason Yun is a graduate of The Ohio State University, with an earned Bachelor's of Science degree in Sports and Leisure Studies with an emphasis in fitness, coaching, and recreation. He is a Certified Strength and Conditioning Specialist (CSCS) and Certified Personal Trainer (NSCA-CPT) through the National Strength and Conditioning Association (NSCA). Is a Kettlebell Athletics Instructor (KBA).  Is a certified United States Weightlifting Sports Performance Coach (USAW SPC). Is a Certified Sports Nutritionist (CISSN) through the International Society of Sports Nutrition (ISSN). Has achieved his certification as a Youth Fitness Specialist (Levels 1) (YFS(1)) through the International Youth Conditioning Association (IYCA), and is currently working on Level 2 and 3. Also earned his Youth Speed and Agility (YSAS) certification in 2012 also through the IYCA.  In 2013, he earned his Functional Movement Screen level 1 certification through Functional Movement (FMS1).

    Was  inducted into the Fitness Business Insider Hall of Fame (October 2011) for his continued dedication towards clients and the fitness industry as a whole.

    In July 2012 earned his Fit Moms Certification as a Perinatal Fitness Instructor for women. An online workout site for expecting moms is currently running. If you are an expecting mom or already a mom and would like to work with Jason please visit Mommy Strength.

    Some of Jason's past related experience placed him as an intern assistant strength and conditioning coach for several Olympic sports teams at the University of Louisville. He has worked as a personal trainer, strength coach, and as an instructor of kid's fitness classes and rock climbing activities. Adult, Child, and Infant CPR and AED certified. Successfully completed a flexband training seminar and a one-on-one coaching session with Dave ‘The Bandman' Schmitz for the applications of Resistance Bands for flexibility, fitness, and resistance training.

    He has trained for over 28 years in various disciplines in the sporting and fitness worlds and now brings to you all those years of training and knowledge in the quest to help you achieve the body, health, and mind you've always wanted through Improvement Warrior Fitness!

    Read Jason's Article on How to find the Right Personal Trainer on Columbus Underground



    Improvement Warrior Fitness Assistant Coach

    Kaitlin McGuffie (aka Rosa)

    short-term fitness bootcamp goals jason yun

    Hey there! My name is Kaitlin McGuffie or as Jason calls me Rosa – it’s a long random story, ask me about it sometime!
    I live in Hilliard with my husband Rick, and our 5 year old fox  terrier/Chihuahua, Dexter. I’m an energetic and fun-loving person. I love meeting new people and always do my best to make you feel welcome at our studio. You might even see me dancing along to music during the workout – don’t be afraid to join in!
    I’ve been an Improvement Warrior since the fall of 2009. Throughout the years, I have not only lost weight, I’ve gained confidence, strength, and a true love for helping others achieve these same things. I’ve been coaching IWF clients since January of 2015 and am continuing to learn and grow each day.
    I strongly believe that we all must take time to do what makes our souls happy and I’ve found that happiness at IWF – I hope you will too.
    During the day I am the Director of Events and Foundation Programs for the Ohio Academy of Family Physicians.
    I lead the Academy's events as well as manage programs that encourage medical students to consider a career in family medicine. I went to college at Otterbein College and graduated with my Bachelors of Arts Degree in 2010.
    I may just be starting out in my fitness coaching path, but I am so looking forward to working with you and helping you grow alongside me. I’ve learned so much at IWF and if anyone that knows me knows, I ask a lot of questions and am always willing to share all that I’ve learned. Looking forward to meeting you.
    Let’s do this!
    hilliard and columbus kettlebell training


    Improvement Warrior Fitness Assistant Coach

    Starla Bible

    Starla Bible has been with IWF since 2009. Starla, as a product of the 80's has been blessed with fitness in her life since she was a toddler starting with going to jazzerise with her mom. In elementary school she shinned in gymnastics as well as break dancing. In middle school her need for speed was born. As a sprinter Starla broke several records on her middle and high school track teams and as a collegiate athlete she has two NCAC national championships.
    In her free time Starla coaches youth flag football and watches her Indianapolis Colts.





    Assitant Coach Hilliard Improvement Warrior Coach

    Rick Locke, YFS

    rick locke helps people get in shape fast and burn body fatRick Locke has been involved in sports throughout his entire life. Raised in Urbana, Ohio he competed and lettered in Football, Basketball, and Track for the UHS Hill climbers. While serving in the U.S. Army as a Military Police Officer, he was also a member of the track team while stationed at Ft. Bliss El Paso, TX and Vicenza Italy. As an MP and, later a civilian Peace Officer, Rick is well practiced in multiple facets of hand-to-hand combat, strength & agility training, and as an emergency responder. In fair weather, he also enjoys cycling extended distances on Ohio’s bike paths. There are not many athletic challenges he will shy away from.

    “Besides family, I have two passions: Fitness and music”, says Rick. “As a DJ, I get to live out my dream of making a difference in others lives by performing at weddings and other personal events, as well as in the club scene. Being a fitness instructor satisfies the other desire to help people attain their fitness goals through proper training and by being a good example.”

    Rick is trained by Jason Yun of Yun Strength & Fitness Systems and has earned his Youth Fitness Specialist (YFS) Certification through the International Youth Conditioning Association (IYCA)

    He is currently working on earning his Kettlebell Certification.

    Press Release About Rick Locke and Special Certification

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