Getting to the gym can be tough.
Knowing what to do there can be even tougher!

Personal Training

At Benicia Fitness we employ a couple of wonderful personal trainers to get you through your workout.  Personal trainers can be for anyone. No matter what level of skill or fitness, everyone can use someone to help them achieve their fitness goals.  Whether you're training for a marathon, looking to build some muscle, or just want to stay healthy, our trainers are there for you.

Boxing Lessons

Fun!  A workout for the mind and the body! An awesome stress reliever! Exhilarating!  Empowering!  These are just some of the ways or members describe boxing lessons with Cheryl.  So put on those gloves, focus that mind and prepare yourself for an awesome cardio, core and strength workout that will blow your stress away.

Healthy for Life Program

As overall health is such an important part of our mission at Benicia Fitness we have recently introduced our brand new program, Healthy for Life.  To start with, we measure your body composition and body fat percentage as well as your levels of fitness when it comes to cardio, strength, flexibility, core and balance.   Based on these results and your goals, we then design a workout plan and or nutrition plan to help you achieve these goals.  We also offer follow up measurements of your body composition and fitness levels. You can choose to do the entire program or any part of it.

Learn more about Our Health programs

Our Trainers

Joy Rund

Joy has worked as a personal trainer and fitness instructor at Benicia Fitness since 2004. In 2014, she took over ownership of the gym and has continued to share her passion for health and fitness with everyone to try to better their lives through exercise and healthy living.  

Born and raised in South Africa, Joy decided early on to study nutrition, earning a BS degree in Physiology and a MS degree in Dietetics.  She then moved to the US and got a Madd Dog Spin certification, became ACE certified in Personal Training and Lifestyle and Weight Management, and gained her TRX certification.  Using this knowledge, Joy creates workouts for her clients designed to meet their specific goals.  Her fun workouts incorporate not only free weights and machines but also balls, bands and the TRX.

Sofia Zumpano

Sofia was born in Belo Horizonte, Brazil and has been part of the Benicia Fitness community since early 2021. Before settling in the Bay Area, she lived all over the world, including Canada, the UK, and Spain. While living in the UK, Sofia earned her bachelor’s degree in medical science as well as a postgraduate certificate in strength & conditioning.  

She is very passionate about functional training and barbell workouts in addition to designing personalized fitness programs for her clients. While in the UK, Sofia taught group classes with up to 20 people, including kettlebell, spinning and circuits. She likes to make her clients feel comfortable in the gym and focused on their individual goals.


Cheryl’s passion in fitness is unstoppable. She’s been a personal trainer & group fitness instructor since 2009. She is currently a full time student finishing her degree in Nutrition.  

Cheryl found fitness as a life style and she is very dedicated to share her passion in wellness. At Benicia Fitness, Cheryl teaches Tae Bo®️ Fitness, a total body fitness workout using martial arts techniques to work every muscle. She teaches different variety workouts as she as many certifications under her fitness profession. NASM Personal Training, AFFA Group Training, Taebo®️ Basic, Taebo®️ Advance, Tae Bo Boom Boxing, TRX Suspension Training, TRX Sports Medicine, Insanity, R.I.P.P.E.D, Ripped 4 Kids,U-Jam, P90X certified, Tabata Bootcamp, Certified CPR/ AED / First Aid.  Most of all, she loves to teach one on one Boxing Fitness.

Karina Oviatt

Karina is very passionate and enthusiastic about fitness. She grew up playing soccer along with a variety of other sports from basketball to track. She also loves the outdoors and finding new ways to stay fit while having fun.  Whether it is rappelling in a cave, zip lining or hiking, she’s is always up for a new adventure!

Karina is a certified personal trainer with an NCSF certification. She is also Taebo certified and a group fitness instructor. She finds joy in helping others be passionate about fitness and reaching the goals they have set for themselves. She believes each person deserves a customized workout specific to their individual needs and wants.

Brandon Britton

Brandon has worked as a spin instructor since 2018 and in 2020 he joined the Benicia Fitness team as a certified personal trainer and nutrition specialist.

Born and raised in New Mexico, Brandon comes from a musical family and made a living as a music producer in Atlanta’s prolific music scene prior to his entry into the realm of fitness. Immersed in the music industry, he met an artist manager who was also a personal trainer that introduced him to the regional manager of a Lifetime Fitness, where he booked an audition to instruct a spin class. His energy and music selection made for a perfect fit there before he relocated to Benicia to continue his professional career. Within the physical limitations of recent catastrophic events, he began and continues to produce exercise videos for members to follow along on YouTube and Instagram. Follow him to learn more about his functional mobility training program @brandonab_df