Meet our team of health and wellness coaches



 As a former competitive Olympic weightlifter and CrossFit coach, Chase has experience in a variety of training methodologies. He is also certified in Adaptive training. When he’s not in the gym, you can find him surfing, cooking, or playing with his beagle Monsieur.



Owner & Trainer

Born and raised in NH, lived 13 years in Boston and then ventured out to live the California dream in sunny San Diego, in January 2015. Kristen has dedicated the past 15 years of her life to Health and Wellness. She was always an athlete and was involved in sports her whole life. She played basketball and field hockey from the 5th grade until she graduated Simmons College in 2006. 

While living in Boston, she obtained her Massage Therapy license, 600 hour personal training program and two 200 hour yoga trainings. Kristen is the lead trainer and owner of GFIT.  When you take her class, you will notice how her cuing is anatomically sound, she always help supports clients with good form, to cater to their body and is super motivating because she believes that anyone can MOVE their body if they are taught well. Kristen's style of training is super dynamic. She will challenge you every time you come in to workout and uses every single minute of class to make sure you leaving sweaty and tired. She loves Kettlebells, TRX training, dynamic bodyweight exercises and burpees! Her intensity in her workouts and motivating music will have you coming back for more! 



Amber has had a passion for health and fitness since she was 5 years old.  From dance, basketball, track & field and tennis, she has always been involved in sports and working out.  After college, Amber continued her journey by teaching mainly resistance training and HIIT classes.  She became CPT certified in 2017 and found her true passion in teaching a variety of fitness classes from HIIT, Bootcamps, Zumba and Spin.  In her free time she loves to cook, read, travel and hangout with her dog Quinn.

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Shelby is a Registered Dietitian, Zumba Instructor and Fitness Coach with a passion for overall health and wellness.  She believes that fitness and nutrition should bring joy and positivity to your life.  Although one may see her as a cardio queen on the dance floor, Shelby loves to strength train (especially the gluten!)  Originally from the Bay Area, she has always wanted to live in San Diego and finally made the leap in 2020.  When Shelby isn't in the gym, you'll find her doing something crafty.  She loves to paint, make jewelry, and do anything DIY.




A dancer for over 20 years, an elementary teacher for 10, and now acting as a Principal in a high performing STEAM & Project based Learning Charter School, she sees physical movement and creativity as essential elements to maintaining a healthy mind, body and spirit!  She seeks to teach dance from a universal concept of rhythm rooted in dance traditions from India, Africa and Latin America.




A lifelong athlete, Kalyn started playing basketball in the 3rd grade and continued through college, leading her team as a Captain. She became a NASM certified personal trainer in 2015, Corrective Exercise Specialist and Fitness Nutrition Specialist in 2017 and recently completed her 200-hour yoga teacher training at UCSD. She is currently studying to add Performance Exercise Specialist to her certifications. 

Enthusiastic about movement, Kalyn uses a functional and restorative approach to teach others how to move efficiently and pain free. With a combined 10 years of experience in the medical field and fitness industry, it is her passion to bring everything she's learned and share it with as many people as possible. In addition to classes at GFit, Kalyn teaches diabetic lifestyle prevention, personal wellness courses and yoga at UCSD. 

A firm believer in exercise as therapy, Kalyn aims to not only work up a sweat in her clients, but provide the knowledge and tools to lead a healthy lifestyle and unlock their true potential, both physically and mentally. 




Elizabeth has been hooked on group fitness ever since taking jazzercise classes with her mom as a girl. She holds certifications in yoga, Pilates, barre, spinning, Zumba and strength training. She put herself through college and grad school teaching exercise classes. 
She received her doctorate degree in physical therapy from SDSU in 2016 and currently works as a pelvic floor specialist at Kaiser. She enjoys bringing her love of anatomy and kinesiology into her fitness classes, and emphasizes injury prevention, deep core stability and joint mobility for a safe, effective and kick a$$ workout. 

In her free time, Elizabeth loves reading, writing, trying new recipes, eating everything, and traveling the world.



Genevieve has been a full time ISSA Certified Personal Trainer since 2015, training both athletes and non athletes.  Her passion for training comes from years of sports competition all through high school and into college, and she fell in love with the sport of Boxing in 2007.  Her strength training began when she started using kettlebells in 2012, and became a Strong First KettleBell Instructor in 2017, and loves incorporating them with her clients' training programs.

Her passion for fitness sets itself apart from the more mainstream approach of teaching isolated exercise, and instead focus on natural movements to improve strength, decrease pain and build confidence in the gym.

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Jordan Tuzon, originally from San Diego, California, obtained a degree in Healthcare Coordination and is also a NASM Certified Trainer. Jordan has overcome a plethora of health problems in his fitness journey. He was on the verge of becoming diabetic and was 80 pounds overweight. Throughout the past three years he has been able to successfully create a healthy lifestyle with fitness and nutrition through rigorous education on his own. With his upbeat attitude and energy, he is thrilled to be teaching at GFIT and helping people on their health journey.  His specialities are HIIT, endurance and strength training and weight loss. He is excited to show his unique style of training at GFIT and ready to have fun! 



Operations Manager & Nature-Connected Coach

Lauren grew up surrounded by strong women. She spent several summers of her youth at an all-girls camp in Maine, where she learned self-reliance, perseverance, strength and a strong sense of self.  As a woman, she finds it incredibly important to support other women in becoming the best version of themselves. Lauren graduated with a degree in Outdoor Leadership and Education, and worked for several years as a wilderness guide, specifically with girl’s aged 13-18.  Over the years, Lauren realized how important it was for young women to have strong female role models and to love themselves in order to grow up to be strong independent women. She has always seen the outdoors as a place of freedom, serenity and great challenge. Lauren uses nature as a tool to reconnect with her clients, in an environment bigger than themselves.  She explores deeply with her clients to identify what has been holding them back from making meaningful changes in their lives, and inspires them to discover for themselves what is needed to become that change. Lauren offers private coaching, workshops and group accountability coaching. She also collaborates with other teachers, coaches and professionals in the Health and Wellness field, to offer a one-of-a-kind holistic approach, which sets up her clients to take on the world as strong, successful women.




Angelina Keselburg is a plant lover through and through.  She is an Herbalist who is inspired by weeds and wildflowers.  She is a natural connector and loves introducing people to plant spirits.  Most days, you can find her in her jungle inspired home, whipping up teas and tinctures for her herbal clients and watering her many, many plants.

(619) 338-8030

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