Function 5 Fitness offers Muay Thai Kickboxing, Personal Training, Nutrition and Wellness services in the Los Angeles and Hollywood area.

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Roxy Balboa Richardson Muay Thai Trainer Roxy "Balboa" Richardson Co-Owner, Head Muay Thai Coach
SFG II Kettlebell Instructor, and Nutritional Consultant

Roxy Richardson, ACE CPT,  SFG II is the co-Owner of F5 and head Muay Thai coach. She has over 10,000 hours of hands on client training experience in fitness, muay thai, strength and conditioning and nutrition.
Roxy discovered her love for Muay Thai in 2002. She got certified as a personal trainer by the American Council on Exercise (ACE) in 2005 and dedicated her life to fitness and health. She is also an SFG Level 2 Kettlebell Inctructor  and aFunctional Diagnostic Nutrition Practitioner.


Roxy Richardson Muay Thai Champion IAMTF Female FighterIn Muay Thai Roxy held the IAMTF Women's Lightweight belt as an amateur from 2008-2009 and turned pro an undefeated champion. She was the fiist female fighter in the United States to fight a 5 round full rules Muay Thai bout, when she made her pro debut in 2009. Check out Roxy in action here.


Roxy retired from professional Muay Thai fighting in 2011 so that she could focus on running her gym full time, coaching the F5 fighters, teaching classes and managing her team. You can visit Roxy's Blog to learn more.










Tyler Schaeffer Personal Trainer




Tyler Schaeffer CSCS, SFG II, Personal Trainer , Head Strength & Conditioning Coach

Tyler Schaeffer is a Certified Strength and Conditioning Specialist (CSCS) by The NSCA, a USA Weightlifting (USAW) Level I coach and an SFG Level II Certified Kettlebell nstructor. Growing up in Las Vegas, NV, Tyler played football and baseball at the varsity level while working with several strength coaches and personal trainers in order to maximize his potential on the field. The work in the gym paid off with the opportunity to play football at the college level for Grinnell College in Iowa.
After college Tyler decided to pursue his passion of fitness and athletics by helping others achieve their physical goals, whether that play sports at a competitive level or simply live a healthy and fit lifestyle.


Tyler's philosophy is the same as F5 Fitness: If you train like an athlete, you will function, look, and feel like an athlete. To excel on the field, athletes must be in phenomenal shape, and it is no secret as to how they achieve this level of fitness. The same compound lifts, plyometric movements, and conditioning programs that reward athletes will also reward the general public. We all do not have the genetics to become professional athletes, but we can train ourselves to our genetic potential.



Kate McGray Muay Thai Trainer & Fighter Kate McGray SFG I, NASM Personal Trainer & Muay Thai Instructor
Pro Muay Thai & MMA Fighter



Kate received her BA in Art History from Boston University, MA. She is a NASM Certified Personal Trainer, a Level 1 SFG and is FMS certified. She started Muay Thai training under Roxy in 2005 finding Muay Thai a great workout and an excellent way to add purpose and discipline into her life.


With her hard work she quickly grew into a courageous and talented young athlete. In 2008 Kate took a trip to Thailand where she spent 3 months training at a Muay Thai camp.  She ended her experience there with a 5 round full rules Muay Thai fight against a Thai girl which she won by unanimous decision.


Today Kate trains her clients with the same patience, passion and attention to detail that helped her thrive as a young female athlete. She knows how to make workouts rewarding, always keeping things fresh and innovative with the client's goals in mind.



Patrick Webb SFG Kettlebell Instructor



Patrick Webb SFG I, Strength and Conditioning Coach, Personal Trainer



Patrick is passonate about kettlebells and strength training. He always enjoyed sports as a high school athlete, but it wasn't until he discovered kettlebell training that he found his love for strength training.


Patrick earned his SFG I in May 2015 and is currently a  strength coach for classes at F5 and take personal training clients.


A technical and patient instructor, Patrick understands how to teach a variety of different individuals the art of strength training.



Chelsey Starling Personal Trainer



Chelsey Starling SFG 1, NASM Certified Personal Trainer



Chelsey has been a NASM certified personal trainer since 2014. She earned her SFG Level 1 in 2015. She teaches the Fighter Fit and Strength classes at F5 Fitness and is passionate about helping clients get excited about fitness and achieve amazing results!