ONYX Athletics

05/27/2025

05/05/2025

Say hello to Gautum! Our new personal trainer/coach. Let’s give him a huge welcome to Onyx!

“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!”

Gautum specializes in biomechanics, neuroscience, rehab and athletics performance.

05/03/2025

Let’s give Jess (our new personal trainer/coach) a big welcome to Onyx!

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.

04/30/2025

Let’s goooooo! Get Strong This Summer!
Join our Teen Summer Grind Lifting Camp and take your strength and performance to the next level. Designed for teens of all fitness levels, this camp focuses on building power, improving lifting technique, and boosting confidence in a fun, supportive environment. Don't miss your chance to lift, learn, and level up!
Spots are limited — sign up today!

04/28/2025

🚨 Supplements play a key role in helping you recover faster, train harder, and get results — whether you're just starting out or leveling up your fitness game!

This May, every 1st Phorm purchase enters you into a giveaway to win a bag full of top-tier products, including Phormula-1, MegaWatt, Ignition, and a 1st Phorm shaker cup. No membership needed, just stop in to shop!

Fuel your body, support your goals, and win big — only at Onyx Athletics!

03/12/2025

🚨 New Fob System🚨

We’re excited to announce we’ll be switching to a brand-new fob system for all access needs! 🔑✨

However, until then, please continue using your current fob to access the building as usual. The new system will be fully up and running on March 27th. (You can find directions on how to access the new system posted in the gym).

We appreciate your cooperation and can't wait for you to experience the new system! If you have any questions, feel free to reach out.

01/29/2025

🚨 Hello gym fam! We have important news! 🚨
We will be switching over to a new software program in February. We encourage you all to download the GymMaster app (link attached). No need to create an account yet but have The App downloaded and ready to go for a smooth transition. You will be issued a QR code that will allow you access into Onyx when the switch is complete. No worries for those of you that need to have a key fob instead, those will still be an option.

https://apps.apple.com/us/app/gymmaster-member/id1297093746

12/25/2024

As we celebrate the season, we want to remind all of our members that key fob access only will be in effect for the holidays. Be sure to bring your fob with you for seamless access!

Thank you for being part of our fitness family! We wish you a Merry Christmas filled with joy, health, and happiness. 🎁💪

Stay fit, stay festive, and we’ll see you at Onyx! 🎉

11/28/2024

Happy Thanksgiving to all our gym family! 🍂🏋️‍♂️ Enjoy the holiday and remember to stay thankful for your health and strength. Please note that today the gym is FOB access only. Make sure you’ve got your key fob to get in and keep up with your fitness goals! 🦃💪 Have a great day!