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Our Team

  • Photo of Leslie
    Leslie GYMGUYZ Owner
    Photo of Leslie
    Leslie GYMGUYZ Owner
    Leslie Dempsey
    San Rafael, California
    Marin County
    “Feel the fear, do it anyway”- Jo-Ann Houston shared this quote at GG training

    After I had my two children, I was on a mission to get back in shape. I started going into the gym and my husband Brain helped my with programming for weight loss and muscle building. I was also focused on nutrition. I got in the best shape in my life and started empowering others to do the same! I have played all types of sports but found my passion in Dance. I am trained in ballet, tap, jazz, hip hop and modern dance. Last year I found a great passion in Pole Fitness and now I train twice a week!

    My mission is to build a business that empowers our clients to change their lives and be the healthiest they can be! We are all about enhancing our clients lives by motivating them, holding them accountable and providing support in them most loving and compassionate way.

    My husband Brian, is a co owner and while he has a full time job in the staffing and recruiting industry, he is a constant help and support in operating GYMGUYZ! He is my rock and his ambition and energy is an inspiration to me. On June 17th we are celebrating our 11 year wedding anniversary and 12 years together! He loves mountain biking and swimming. Brian is the most amazing father to our children and the greatest partner a woman can ask for. My favorite thing about him is his unwavering loyalty to me, our family and the life we have built together.

    My daughter Layla is about to be 7 years old and she loves art, reading, swimming, gymnastics and dance. Her athleticism constantly surprises me and her kindness towards others makes me beam with pride. For being so young she has such a strong sense of responsibility and need to do what is right. Layla is always ready for the next adventure, loves to travel, loves to be around the ones she loves and she is so intelligent.

    My son Jack will be 4 in September and he loves swimming, and building and creating things. He has such an outgoing personality and his humor makes me laugh out loud everyday! While he has strong opinions he is so loving and affectionate.

    In being a parent, what I most proud of is the value my children place on our family unity! My son is always talking about how we are a team and my daughter places the utmost emphasis on our family bond.

    I am a certified fitness trainer and plan on getting a certification on nutrition as well!
  • Photo of Angela
    Angela Personal Trainer
    Photo of Angela
    Angela Personal Trainer
    My name is Angela Martin. I have been a fitness trainer in the Bay Area since 2005. I am NASM certified and hold a HCC (Holistic Health Coaching) certificate from IIN (Institute for Integrative Nutrition). I joined GYMGUYZ in March 2018.

    Anne Lamott’s writing and humor remains a constant joy in my life. Not only does she make me laugh she reminds me to add levity to life.

    “The road to enlightenment is long and difficult, you should try not to forget snacks and magazines!” Anne Lamott

    I love to bike, hike and run and when I have extra time to myself I enjoy paddle boarding. Having young kids and an adventuresome husband keep me very active too!
  • Photo of Corinne
    Corinne Personal Trainer
    Photo of Corinne
    Corinne Personal Trainer
    Hi, my name is Corinne a trainer for GYMGUYZ. I've been a certified personal trainer for 3 years. I hold four certifications: one for personal training, two for kickboxing, and one for nutrition. I'm currently working on a corrective exercise certification! I specialize in strength training, and love helping people reach their goals and build their confidence!
  • Photo of Jean-Michael
    Jean-Michael Personal Trainer
    Photo of Jean-Michael
    Jean-Michael Personal Trainer
    Hello My name is Jean-Michael, people often call me J-M. I have grown up and lived in Marin my entire life and have a health conscious awareness.
    I have had 5 years working as a fitness instructor/trainer. I used to practice teaching Crossfit, Parkour, basic Martial Arts, and Gymnastics. I train all ages in learning how to enhance their movement and quality of life, while also learning how to have fun! I have a certification as a Gymnastics Instructor and am a CPT under NASM.

    My favorite Quote comes from Einstein, where he says “Insanity is doing the same thing over and over again and expecting different results.” I try to incorporate this with new exercises, techniques or skills to learn daily. Mixing up exercise patterns has always been fun for me, and it keeps it interesting for those around me as well!

    I exercise everyday. I make habits that allow for growth each day, with little improvements overtime. By biking, practicing gymnastics, weightlifting, learning a new skill, playing with my dog, and even joining in with my clients! I am never stuck in place for more than a day.
  • Photo of Jen
    Jen Personal Trainer
    Photo of Jen
    Jen Personal Trainer
    Jen loves to move, both indoors and outdoors. She took her first body movement class when she was 3 years old, began studying ballet when she was 7 and enjoyed a short career in performance art. After moving to San Francisco, she began teaching group fitness classes for the YMCA of San Francisco in 2007. Jen enjoys connecting clients to their own health and wellness in a supportive and happy environment. She also believes fitness should be fun and often adds a cardio dance break in her sessions! Jen says “motivating others and watching them succeed brings me joy”. Because of this passion she recently received her Certified Personal Trainer Certification through the National Academy of Sports Medicine. When Jen's not training clients, you can find her trail running, biking, hiking, downhill skiing or cutting it up on the dance floor.

    Favorite Quote
    "When life knocks you down, do a burpee!"
  • Photo of Katie
    Katie Personal Trainer
    Photo of Katie
    Katie Personal Trainer
    Katie Mayers,
    Personal Trainer &
    Group Exercise Instructor
    BA Psychology, MA Anthropology, ACE Personal Trainer since 2002, Sample certifications; YMCA Group Exercise Instructor, TRX Level 1, YMCA Strength & Conditioning Course Teacher, Yoga for Personal Training.

    My journey in Fitness began in weightlifting several decades ago, as a way to alter lifestyle habits, and the direction of my life. With regular dedication and dramatic results, it wasn't long before others in the gym, including my friends, began to ask for training tips, information or help. Several years later I began teaching classes and loved it! With thousands of hours of training, teaching and managing fitness centers under my belt, regular examples of Client sucess include; 100 pound weight loss, training for 100 mile century bike races, and no longer needing medications due to consistent and progressive changes in diet and exercise.

    My specialties are helping clients regain strength and health in midlife, working with women's health issues, weight loss, flexibility, older adult exercise, adaptive fitness, pre and post rehab for knees and hips, as well as recovery from a traumatic life event through body movement. My approach is to consider all factors, such as time management, competing demands of family or community, to listen and watch attentively, have fun, and respect the client's inherent wisdom as the steward of their body.

    To better address providing guidance in changing lifestyle habits, my scope of practice is expanding to include comprehensive Health and Wellness Coaching. Teaching corporate classes for GymGuyz Marin is such a privilege to help students make positive changes in their wellbeing and quality of their lives!