Yumi Lee, co-owner of Reebok CrossFit LAB, is an internationally renowned fitness expert who has been active in the fitness industry for over 15 years. She travels the world as an international presenter and trainer, honing the skills of professional athletes, and sculpting the bodies of Hollywood's elite.

She has worked with Brad Pitt, Jessica Alba, Pink, Hugh Jackman, Deborra-Lee Furness, Nicole Richie, Demi Moore, Orlando Bloom, Miranda Kerr, Julianna Margulies, Peter Krause, and Sporty Spice of The Spice Girls. She also trained with Cris Carter's FAST program to sharpen her skills in the world of athletics, speed, endurance and performance training.

Her intense style of training can be attributed to her personal experience in the world of athletics. She competed in the National Sport Aerobics Competition for seven years where she won three gold, two silver and one bronze medal.

Yumi believes that there is no greater investment than the investment in one's self — mind, body and soul. Her combination of practical knowledge, realistic lifestyle changes and unwavering motivation challenges her clients both mentally and physically, ultimately bringing them to a new level of fitness.

CrossFit Level 1, Coaching Prep Course, CrossFit Gymnastics

First CrossFit Workout:
Fran with Burpees

Favorite WOD:
Filthy Fifty – love the chippers

Least Favorite WOD:
CrossFit Total

Ron Mathews, co-owner of Reebok CrossFit LAB, has been one of the top personal trainers in the US for the last decade. Recognized by Men’s Journal as one of the 100 best trainers in the world, Ron’s list of A-list celebrity clients speaks to his ability to give his clients red carpet results.

After being humbled by his first CrossFit workout, Ron immersed himself into CrossfFit. “I thought I was in good shape. I looked good but it was all just smoke and mirrors. CrossFit exposed all of the chinks in my armor. Now I have a more complete level of fitness that goes beyond aesthetics. Looking good is the by-product of the work.”

Whether you are a veteran, or new to CrossFit, seek out Ron for help with any aspect of fitness. He is always available to lend his expertise. His enthusiasm and passion for CrossFit is infectious and he loves what he does and shares his passion every day he steps into the gym.

CSCS, ACE, ISSA, NSCA, CrossFit Level 1, CrossFit Coaches Prep Corse, CrossFit Powerlifting

Height 6’2”
Weight 225
Fran: 2:55
Deadlift : 555
Back Squat: 435
Press: 220

First WOD:
Fran + Burpees (horrible)

Favorite WOD:
CrossFit Total
Linda aka, “Three Bars of Death”

Least Favorite WOD:
Anything in the 18-22 min range

Sterling Price Brown, grew up wrestling and playing football and continued through High School. When he moved to Los Angeles to further his acting career, he quickly became involved in Krav Maga, and that's where he found CrossFit.

He excelled at it quickly and knew he wanted it to be a big part of his life. He immediately received his CrossFit Level 1 Certification and started coaching athletes.

He is constantly motivated by coaching, learning, competing with friends and being a part of such a great and large community.

CrossFit Level 1, CrossFit Olympic Lifting, Crossfit Gymnastics, Crossfit Powerlifting, Crossfit Strongman, Crossfit Mobility, Crossfit Rowing

First CrossFit WOD:
The Sissy Test

Favorite WOD:

Least Favorite WOD:

Zach Mayer is a CrossFit Coach and Personal Trainer at Reebok CrossFit LAB. Two years ago, he stepped into a CrossFit box in Eugene, Oregon and has never looked back; his passion for fitness and sports was reignited. Growing up Zach played lacrosse, ran cross country and played recreational soccer through college. However, moving heavy loads across long distances at a high intensity holds a special place in his heart.

As a personal trainer, there no greater feeling than to help teach and guide others along their path to health and fitness. "To restore the reservoir of self respect and confidence through fitness," says Zach, "is the reward of my work." Over the past year, Zach has fully immersed himself in the fitness industry through formal study, rigorous training and practical application in the class setting at the LAB. He feels incredibly lucky to make his passion his full time work.

When Zach is away from the gym, he enjoys exploring LA via motorcycle, drinking specialty coffee and spending time with his girlfriend, J.Lucy, and their dog, Shadow.

CrossFit Level 1
USAW Sport Coach (Olympic Lifting)
CrossFit Rowing

First CrossFit WOD:

Favorite CrossFit WOD:
"Jackie" (1000m row is a warm up!)

Least Favorite CrossFit WOD:
Open WOD 14.2

Cortni Joyner was a natural athlete and grew up playing soccer. She was an all-SEC midfielder at the University of Georgia before spending 3 years in the W-League with the Atlanta Silverbacks.

After moving to LA in 2010, she found herself struggling to recreate the competitive atmosphere of the soccer world. More importantly, she needed to find a training regimen that wouldn't bore her to tears. Enter Crossfit. "I used to watch the other sports on campus (at UGA) and steal little bits and pieces of their workouts, put them together and create my own workouts. Crossfit was like that, times one hundred. What made it even better was the community and being able to train in a team environment again."

Cortni's goal is to bring her enthusiasm and experience as an athlete onto the coaching floor. She believes when her clients feel safe and comfortable in their environment, they are able to push themselves more – physically and mentally. She loves seeing members hit PR’s and learn new movements.

Cortni's motto is, "Crossfit isn't about being the best, but about being your best."

When she's not coaching or working out, Cortni is working her J.D. at Southwestern Law School.

Crossfit Level 1
M.S. Kinesiology, University of Georgia

First CrossFit Workout:
Fran, I used a band and got a DNF

Favorite WOD:

Least Favorite WOD:
Karen. Or anything with wallballs. Wallballs are terrible.

Rush Kemp is the General Manager and Personal Trainer at Reebok CrossFit LAB. His CrossFit journey started off and on about 3 years ago, and was hooked from day one. Making major life changes and moving to Los Angeles in 2013 to start his career goals in the Fitness Industry. Fitness has been a point of interest since he was 6 years old, watching his mother compete in power lifting meets. He started researching and forever wanting to learn about muscle development and healthy living.

After training friends and family on the side for years, he came to the conclusion that switching to a career in personal training, and helping others discover their potential would be the biggest reward anyone can ever achive. Real results and creating a lasting bond between himself and his clients no matter what their goals are is what it's all about. When he's not training or in the gym he's bummin' it at the beach.

Rush's motto is, "Winning isn't everything, but wanting it bad enough is."

ISSA, TRX Suspension Training

First CrossFit WOD:
Kelly - wasn't pretty.

Favorite CrossFit WOD:

Least Favorite CrossFit WOD:
Anything with an 800+ meter run...running is the worst.

Scarlett Redmond

A former dancer, Scarlett came to her yoga practice with a desire to meld movement arts with a physically demanding practice. Drawing from a versatile background in dance and physical theatre techniques including Meyerhold's Biomechanics, Feldenkrais, and the Alexander Technique, Scarlett encourages proper alignment and safety through mobility. She completed her 200-Hour RYT Certification with David Vendetti and Todd Skoglund at South Boston Yoga in 2012, and started her CrossFit journey in 2013.