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Our Trainers

Nick Walejeski (Owner)

Nick Walejeski (Owner) Book Now

NCSF, NESTA, NASM, USAT (USA Triathlon), TRX, Bachelors in Psychology

My name is Nicholas Walejeski and I have been involved in the fitness industry since 2004. I have group and individual clientele ranging from college level athletes looking to increase sports performance, to older populations looking to increase quality of life. I have a passion for the fitness and wellness industry and believe that in order to successfully change one’s fitness lifestyle, one’s current psychological abilities must be challenged and changed as well. I have a Bachelor's degree in Psychology from Cal State San Marcos and have held multiple nationally recognized personal training certifications (NCSF, NESTA, NASM).

I believe in a holistic approach to fitness and wellness where my clients not only re-shape their bodies, but they re-shape their thoughts and attitudes towards fitness. I have competed in college level volleyball and have coached Men's Varsity Volleyball at Davis High School. I am experienced in developing personalized weight loss programs, resistance training programs, hypertrophy training, core training, polymetrics, functional training, post-injury programming, and special population training. I have been leading indoor and outdoor boot camps for over 5 years now and am continually impressed by the repeatedly developing abilities of my participants. Triathlon training has developed into one of my most successful fitness programs where people develop into a brand new sport and build lifetime friendships with fellow competitors.

I have been leading the triTRAINed triathlon training program in Davis since 2010. Each year we grow stronger and represent deeper within the triathlon community. We are a goal oriented program and are proud to train a wide range of athletes; from first timers looking to complete their first triathlon, to consistent top three podium finishers. I hold a Level 1 USAT triathlon certification. Please take a minute to read our success stories in the Before and After section.

I like to bring a fun and creative edge to my fitness programs where your current levels of fitness are challenged in new and exciting ways. My passion for fitness and wellness is contagious and will become ever apparent as I guide you to your fitness and wellness goals the quickest and safest ways possible.



Thomas Gojkovich

Thomas Gojkovich Book Now

ACE: Certified Personal Trainer, NSCA: Certified Strength & Conditioning Specialist B.A., Sociology, Sonoma State University, Credentialed Physical Education Teacher, Former DHS Assistant Varsity Baseball Coach

Fitness has always been a part of my life. As I grew up in Davis as a young boy I was an avid baseball, basketball and soccer player and loved the thrill of competitive sports. As I went through high school and into college, I realized that baseball was my true love and to excel in my passion I needed to focus on getting into shape, which meant getting serious in the gym. It was during my junior year of high school that I started strength training and working on my cardiovascular fitness. I was hooked. The way that exercising made me feel was unmatched by many other aspects of my life and I now want to spread that feeling.

I am realizing every day that fitness is my passion and I love passing on the vast number of advantages that come with an active lifestyle. I am a Certified Personal Trainer through the American Council on Exercise (ACE) as well as a Certified Strength and Conditioning Specialist through the NSCA. These two certifications give me the knowledge and skills needed to train the recreation fitness enthusiast as well as competitive athletes.

If success in sports is what you desire, I can be the person that helps you achieve that goal, but that is just one aspect of my skill set. I enjoy helping others get comfortable in a fitness setting, losing weight, gaining muscle, improving balance and mobility, or any other goal that you may have. I live my life in a way that promotes health and longevity and encourage others to do the same. I realize that sometimes life gets in the way but when it does, I will be there to help you persevere. I welcome challenges, whether I am helping someone lose weight who has previously had little success, or training someone to compete in an event that they never thought they could before. I encourage you to follow your passion, develop goals, and reach for things that you thought were out of your reach before. Let’s get fit and lets do it together.



Liz Sheridan

Liz Sheridan Book Now

SFSU BA Physical Education-Pre Physical Therapy, SFSU MA Gerontology, NSCA-CPT, Lifeguard

Since 1993, Liz has been helping people achieve their fitness goals and feel good about their exercise program. Starting at Millberry Union, on the campus of UCSF Medical Center, Liz worked with people of all ages and abilities. Her client list ranges from new to fitness to elite athletes. In 2000 Liz received a MA in Gerontology from SFSU with a specialization in senior fitness. After starting a family and moving to Davis, Liz returned to strength training in 2010. Liz enjoys sharing her experience and lifelong love of fitness with clients at Get Fit Davis. According to Liz, "Strength Training helps us achieve a variety of personal goals, such as feeling stronger when gardening, participating in sports, and/or powering up hills on a hike." Liz is happy to help you with your goals by creating an exercise program that fits your needs.

If Liz isn't in the gym at Get Fit Davis Sport she is at the pool leading aqua aerobics, teaching private swim lessons to kids, and coaching Masters swim workouts.



Ashton Wolgast

Ashton Wolgast Book Now

ACE Certified Personal Trainer

Hey! I'm Ashton Wolgast, a Certified Personal Trainer through the American Council on Exercise. While my professional title is new to me, I've had a passion for fitness that’s lasted a lifetime. My mom, Honey, always had my brother and I signed up for sports, dance, and anything else that kept us social and active. As a kid I started out with gymnastics and cheer leading. Now I know what you're thinking "cheer leading... really?" However, all stigmas aside, our coaches were tough. Cheer taught and helped me improve my strength training, conditioning, coordination, technique, and agility. It's what got me started. Then, after cheer, I stayed interested in fitness and exercise because of the many benefits of an active lifestyle. In fact, because of my workouts, I went through a total mind and body transformation. This new mindset is the one I want to pass on today.

Over the years I’ve learned and practiced many different methods of training. I started with high-intensity interval training (or HIIT) with calisthenics and plyometrics, then worked my way to powerlifting here at Get Fit Davis. Working at Get Fit Davis has granted me the extraordinary opportunity to train and pass on my passion for fitness. Every day, I gain experience and knowledge from others in the industry. I get to train with Coach Nick Walejeski in the triTRAINed program and with Coach Colin Schmitt in the Davis Boxing Academy. Both of these mentors help me learn new skills and better my training approach as I add to my "fitness library". Currently, I've been able to develop my own style for teaching fitness through instructing boot camps and leading group fitness workouts.

My fitness philosophy is to balance workouts, the same way you would balance a diet. I believe it is crucial to train in a variety of ways in order to learn what works best for you and to keep every part of you fit and healthy. My ultimate goal is to help people figure out how they like to get moving so that they can see their workouts in a way that gets them excited about having an active lifestyle. If you have a weight loss goal, want to look more toned, or just want to feel better during your daily life, I can help you find a program that suits you and helps get you excited about physical fitness. Your fitness is something that will change the way you think like it did for me. You will be more interested in your time-management, food, sleep, and self- improvement in all other areas of your life. Coming to the gym is fun for me. It's a chance to be better than I was the day before, a chance to practice a new skill. Overall, it's a chance to keep learning about myself. Being able to work out is not just a box we have to check off at the end of the day. It is a privilege. I want to help others find that feeling, and am so excited to have that opportunity!



Liz Shull Colenzo

Liz Shull Colenzo Book Now

AFAA Primary Group Exercise Certification

Liz is an AFAA/NASM Certified Personal Trainer and NASM Corrective Exercise Specialist and has been teaching exercise since 2002. She believes in promoting life-long, sustainable wellness while helping clients meet their individual fitness goals.

As a Corrective Exercise Specialist, Liz is trained to identify and address muscle imbalances and postural misalignments with individualized workouts. While training with Liz, you can expect exercises that are custom designed for you to move and feel better while also meeting your personal fitness goals. Overall, Liz strives to help her clients improve strength and mobility, prevent injury and attain muscle balance in their bodies. She has a genuine passion for helping others and does not take a ‘one size fits all’ approach to training. Besides giving her clients the knowledge and tools to continue on their long-term fitness journey, Liz also helps clients cultivate love and acceptance of their own unique bodies.

Liz's personal fitness journey began in her teenage years with sports and dance. By 2002 she was teaching and performing dance professionally while discovering her passion for helping others along their own journeys of health and well-being. Since that time, Liz has taught numerous formats of exercise including body sculpting and cardiovascular training, mind-body practices and various styles of barre and dance fitness. She has completed over 200 hours of training in yoga instruction as well as in-depth training in Pilates through Balanced Body University.



Elizabeth Parson

Elizabeth Parson Book Now


Hi, My name is Elizabeth Parson. I began my own personal journey to a healthier lifestyle 20 years ago when I found myself 30lbs over weight with low self esteem. I wanted to get fit and feel better, but had no idea how. I decided to hire a personal trainer and within just 30 days I was getting great results and more importantly, I started to feel confident. I began to feel stronger not just physically, but mentally as well. Not only was I hooked on my own results, I wanted to share this with everyone so they could feel it too. At this time, I decided to pursue a career in the fitness industry. I have worked with many amazing individuals over the past 15 years who have completely changed their lives through health and fitness. I find it extremely rewarding to be their coach and see their transformation.

I would love for you to take me on your journey with you!



Phone: 530.400.0592


Colin Schmitt

Colin Schmitt Book Now

Colin D. Schmitt

B.S. in Exercise Physiology, University of California Davis (2014), USA Boxing Certified Coach and Founder of the Davis Boxing Academy (Current)

NCBA and USIBA National Boxing Champion Best Boxer of the Tournament (2013 and 2014)

Endurance Athlete and Ultra-Marathoner with finishes from 50 KM to 300-miles, and Personal Best 495 lb Deadlift

I have been an athlete and a student of physiology for decades now and have a wide range of physical capabilities and training methods that I have learned in that time. Though I have never been the biggest, fastest, or strongest, I have always pursued my own individual growth through hard work, dedication, and a well-educated & constantly evolving training methodology.

My clientele is diverse in age, background, and purpose. I train with competitive amateur boxers striving for excellence and victory in the ring, individuals advanced in age seeking physical vitality in their day-to-day lives, and everyone in between. Whatever your path, I will provide you the tools and knowledge necessary to walk that path with confidence and independence.

I do not depend on one training style or set of techniques in my work. My own experiences have taught me the necessity of adaptability in the face of wildly unique and interesting challenges, and thus have never been able to become set in any one method. I do research for my clients’ needs individually, as every obstacle provides its own unique problem that requires special attention and creative solutions.

In combat sports, and in ultra-running, among other things, I have faced a great many obstacles. In persistently facing and overcoming these obstacles I have come away with knowledge that I hope will help you on your journey.

Phone: (650)833-9363



Jeremy Thomas

Jeremy Thomas Book Now

ISSA Certified Personal Trainer

Are you looking for a mentor to challenge the physical aspect of your life? Congratulations, my name is Jeremy Thomas and I am exactly what you have been looking for! I am a leader and fitness influencer in the military community. Devoting time and energy to elevate winners to a higher version of themselves is what gets me out of bed in the morning (along with some help from coffee). I believe the importance of fitness leaders is to aid and inspire your physical and mental development. My expectations for you is a drive to better yourself and the ability to be coachable. If this sounds like you and you’re ready to make a change in your life, I will be there to help you along the way!

Cell: (702) 466-3853



Chris Casner

Chris Casner Book Now

Men’s Physique IFBB Pro


My name is Chris Casner. I am a Men’s Physique IFBB Pro bodybuilder with a passion to help others achieve their health and fitness goals. I specialize in bodybuilding and muscular development. This involves muscle gain and fat loss to be able to present your best physique at its peak. I have been helping people change their lives in the health/fitness world for the past four years with multiple competitors in all divisions of bodybuilding. If bodybuilding isn’t your thing and you just want to get stronger, leaner or simply want to look and feel better then I am the guy for you.

Let’s bring your health and fitness to the next level.