1293 Main St #2
Windsor, CO 80550
(970) 686-2582
24/7 Customer Support
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Windsor, CO 80550
24/7 Customer Support
View Your Options and More!
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!
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!!
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.
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!!
Hey I’m Dani!! A certified Personal Trainer, Nutrition Coach, and the founder of GRIT Coaching (online nutrition + lifestyle coaching). With 8 years of experience, I help driven, growth-minded women build strength, confidence, and a body they love — without restrictive diets or endless cardio.
After 13 years as a gymnast and coming back from a back injury, I found healing and power through strength training. Now, I coach women to create the exact physique they want — with purpose, with grit, and without sacrificing their sanity or joy!
I’m certified through NASM (Personal Training + Performance Enhancement) and NCI (Nutrition + Mindset Coaching).
Whether we’re lifting together at ONYX or working online, my mission is to help you feel strong, sexy, and unstoppable!
Originally from South Dakota, I now live in Colorado with my wife Jess! Outside the gym, I’m probably hiking, sipping pumpkin spice coffee, or by a campfire with friends. Favorite lift? Barbell shoulder press!
Hello! I’m Ye Jee, a mother of four, personal trainer, childbirth educator, and owner/operator of a women’s and children’s recovery home.
My passion for health and exercise is deeply rooted in my desire to encourage and uplift others. I believe that physical/mental/emotional well-being is a cornerstone of personal empowerment. Within any of my roles, I am committed to helping individuals overcome obstacles and achieve their goals, no matter their starting point.
In my personal training sessions, I work with clients of all genders and fitness levels, creating tailored programs that cater to their unique needs and aspirations. I love celebrating each milestone, no matter how small, and relish the opportunity to guide others towards their full potential.
Whether you’re looking to embark on a fitness journey of total transformation, or simply prioitizing your health and well-being, I am here to support you. I am excited about the possibility of working together to help you achieve your goals!
Hey everyone! I’m Jess Markanich, and I’m pumped to be part of the Onyx Athletics community!
Fitness, sports, and strength have always been central to my life. I bring over 10 years of experience in the world of coaching, teaching, and training—from the high school classroom to the collegiate weight room and everywhere in between.
I hold dual Master’s degrees: one in Applied Exercise Science with a focus in Strength & Conditioning, and another in Sport Coaching (in progress). I’m a Certified Performance Enhancement Specialist and Sports Nutrition Coach.
Before coming to Onyx, I spent 9 years teaching Physical Education and coaching a range of sports—softball, wrestling, soccer, and track & field. My passion lies in building strong, confident athletes and everyday individuals who want to move better, feel better, and perform at their best.
Originally from the south suburbs of Chicago, I played Division I softball at South Dakota State University, which helped shape my love for discipline, competition, and teamwork.
I moved to Colorado in 2021 and have been deeply involved in local athletics and organizations ever since—coaching, mentoring, and helping others push their limits. When I’m not coaching or programming workouts, I love playing competitive slowpitch softball, watching sports, sipping a strong cup of coffee, and spending quality time with my wife and our 3 dogs.
My coaching mantra is: “Be the best version of yourself, even when no one else is watching!”
Let’s get to work, Onyx fam. Let’s get strong—together.
I believe movement and strength are foundational keys to building an independent and fulfilling life. Movement starts in the brain and allows us to interact with the surrounding world. Strength training and movement training are the avenues through which we train the nervous system to allow us to live life to the fullest. Training can accomplish everything from rehab to injury prevention to building stronger relationships and even allowing us to make core memories with our loved ones. Fitness is as crucial to a healthy life as nutritional food, staying hydrated and sleep. I believe fitness is for everyone and I’m thrilled to be able to share my passion with those around me!
I’m specialized in biomechanics, neuroscience, rehab and athletic performance.
Years of Experience:
14 Years
Credentials:
BS, Human Biology – University of Southern California
MS, Kinesiology & Neuroscience – The Pennsylvania State University
NASM Certified Personal Trainer
I’m a coach, former bodybuilder, father, and husband to a driven, amazing woman. With over a decade of experience in bodybuilding and 12 shows under my belt, I’ve learned that real strength goes far beyond the gym — it’s forged through discipline, consistency, and mindset. My mission is to help others become the strongest, most resilient versions of themselves — physically and mentally. I coach people through training, nutrition, and lifestyle habits that create lasting transformation. I don’t believe in quick fixes or excuses — I believe in showing up daily, even when it’s hard. I’ve lived this life, I’ve walked the path, and now I help others do the same. If you’re ready to change, I’m here to lead. This is about more than fitness — it’s about forging a new standard for your life.
I am a mom, wife, bikini competitor, and certified nutrition coach. I truly love helping people take steps towards a healthier, balanced life with personalized wellness nutrition plans. With my background in healthcare and as a competitor, my focus is transformative body recomposition. With delicious, simple food in mind I design custom nutrition plans that help transform your body and your plate. I will work with you and or your trainer to design a plan that fits your lifestyle and your goals.
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