1293 Main St #2

Windsor, CO 80550

(970) 686-2582

24/7 Customer Support

Membership Info

View Your Options and More!

Personal Trainers

Brad Bertoch

Owner / Trainer

Fitness has always been a passion of mine, but I found myself overweight and unhealthy in my early 20’s. I made the decision to better myself and my life by learning as much as I could about nutrition and exercise. I lost over 40lbs and added lean muscle during my fitness journey. I have not stopped since and became certified as a trainer in 2014 and also was certified as a fitness nutrition specialist. I’ve competed in bodybuilding and coached many on the road to their bodybuilding competitions. I’ve owned the gym since 2018 and have loved every minute of it! We are here to help anyone that wants to better themselves by getting stronger, leaner, and more mentally focused! Consistency is the key to success and couldn’t be more important to change your mindset and ultimately your body composition!

Natalie Smith

Owner / Trainer

Helping others succeed is one of my greatest achievements. While working towards reaching my own fitness goals I found that helping others reach theirs was much more fulfilling. I love watching people transform into the best possible version of themselves.

My focus is on exercise, nutrition, lifestyle and most importantly balance between them all!! Wether it be fat loss, muscle building, strength training or just wanting to be a healthier you, myself and the team at ONYX Athletics would love to be part of your journey!!

Rachel Hernandez

Personal Trainer

Starting my personal training journey was an easy decision. After having hired a trainer myself when I was in serious need of motivation and accountability, it was life changing. After the birth of my daughter, I was very overweight, had no energy and my self confidence was completely gone. I knew I needed to change. After training for over 2 years with my former trainer, it made me realize what kind of career path I wanted to take. I now have a passion for fitness and want clients to see how rewarding it is to feel great, have energy and possibly be an inspiration to others.

I became certified in personal training through NASM in May of 2021. I have trained clients of all ages and my experience is gaining momentum. I may be new to the health and fitness industry, but I love what I do and hope my future clients will see the passion I have for this profession with each session they push themselves through.

DeAnna McDaniel

Personal Trainer

I have been teaching at Onyx for a little over a year. I became NASM certified in January of 2022 and TRX level 1 certified in August of 2022. I have a passion for helping people achieve their fitness and wellness goals and love working with all ages of clients. I currently teach the Silver Sneaker circuit and stretching classes along with the Cardio/strength class and have a handful of clients. Currently, I am working on my nutrition certification because I really love to help people understand that food and movement are medicine!!

Dani Bachar

Personal Trainer

Hey all! I am so excited to be here and to call ONYX my new home! I have been certified as a Personal Trainer for 6+ years through NASM. I am specialized in Performance Enhancement through NASM which allows me to correctly train athletes for strength, speed, agility, and quickness. I am also a certified Nutrition Coach through NCI! I am working on becoming a Mindset Specialist through NCI as well!

I have worked with hundreds of unique clients that have helped grow and shape me into the coach I am today. I love working with men and women who want to be strong, fast, and feel like themselves again! I graduated from College in May 2021 with an Associates Degree in Marketing and Management through Lake Area Technical College.

I am originally from South Dakota, but moved to Colorado with my fiancé Jess, in August 2021! When I’m not coaching, or supporting Jess while she coaches high school sports, we enjoy hiking, hanging out with friends, being on the lake, and sitting by campfires! I love my coffee and anything pumpkin spice! My favorite exercise is a deadlift! I am the owner of GRIT Coaching – Personal Training and Nutrition Coaching. My mantra is Mind over Matter and as always Trust the Process! Let’s become the best, most strongest version of ourselves together!

Chris Nicholas

Personal Trainer

I’m honored to be apart of the ONYX family and to share my knowledge and experience through my journey as a coach. With close to a decade of working with clients throughout all walks of life and helping hundreds of people reach their targeted fitness goals I’ve also become a student as well, continously growing and mastering my craft as a personal trainer. I hold certifications through ISSA (2017), and working on a certification with NAFC, I moved from Florida in 2021 and I enjoy all the outdoor activities available to me that Colorado has to offer!

A strong belief of mine is that once you set your mind to doing somehting there is nothing stopping you but yourself.