Introducing the RxFIT Team
Meet the fitness experts ready to help you achieve your fitness goals and your potential.
Our Founders

Mark Mckellar & Tyler Welch
Tyler and Mark met back in the summer of 2012 at a youth church camp. Tyler from Ohio, Mark from Arizona, stayed in touch through the years and linked up in Fall of 2015 during their 1st year at Brigham Young University.
Both having a love of CrossFit and Exercise, took over Provo CrossFit in December of 2016, then opened up their 2nd location in Springville in 2018. They have since rebranded the name to RxFIT in January of 2019. Their vision is to help build a healthier human race and cure chronic illness through personal training, group classes, and nutrition!
Our Professional Coaches

TYRE AGUILAR
Head Coach
CF Level 1 Certified
CF Level 2 Certified
Coach Tyre has been with RxFIT since 2017 and a coach since 2018. She is married to Johnny (a truly beloved gym member in our community) and a mom to Luna the Lab.
[email protected]
Tyre is our Head Coach and has successfully ran numerous gym events such as the Sick2Well2Fit Health Challenge, Festivus Competition, Utah Spartan Race, Ragnar Race at Zions, and Hike to Timpanogos! Tyre coaches all the morning classes (4) in Provo, and is a particularly big favorite among the Provo members. Coach Tyre is a hard worker and a loyal friend to all at RxFIT. We love her!

Miranda "Mig" Merrell
Coach
CrossFit L1
CrossFit L2
Burgener Strength Weightlifting L1
Miranda fell in love with fitness in 2014 and has been coaching since 2018. She started out as a mother of 3 with no athletic background. Once she built up some strength and found her inner lion, she didn't look back! Miranda coaches our evening classes as well as our specialty strength classes in Springville. Outside of the gym she loves to obsess over her dogs, her plants, and planning the next vacation with her family.

FERNANDA HERNANDEZ
Coach
CF Level 1 Certified
CF Level 2 Certified
Coach Fernanda has been with RxFIT since the beginning of 2019, and has been in the community for the last 10 years. There's never been another coach we've had that is more passionate and excited to coach, than Fernanda.
[email protected]
She is the wife to Chris (a beloved gym member in our community) and the mom to Cristianito. Fern is very nice and extremely fun to be around but when you’re in her class – you’re in her world! Because of her amazing coaching, numerous members have been able to get fit through her personal training sessions and nutrition consulting. She is also the Head of RxFIT Sport, a competitors program here at RxFIT. Take her class, you won’t regret it!

KYLE BRODERICK
Coach
CF Level 1 Certified
CF Level 2 Certified
Coach Kyle has been a member of RxFIT Since Fall of 2019 and a coach since Summer of 2020! Kyle is an undergraduate at BYU studying Information Systems, and a huge bright light in the gym!
[email protected]
He coaches the evening classes in the Provo gym and is easily one of the most favorite coaches on staff! If you’re lucky you can workout with him in the 8:30 AM class in Provo, and he would probably beat you if the workout involved any kind of gymnastics or handstand push ups/walking movements. We love Kyle so much!

RILEE STONE
Coach
CrossFit L1
Coach Rilee originally joined RxFIT in 2018, and recently joined back as a coach in 2021! She has had the experience of being a part of several other gyms, but she can confidently say RxFIT is family and a place of results. She's a Mom of 3 kids. She enjoys getting out of the house adventures, and kissing her husband.
She’s been to all Utah’s National Parks and takes a walk every Sunday.She coaches the “mom class” at the Springville Gym. Her favorite part is counting down the clock to start a WOD. If you’ve been around long enough, you’ve probably noticed she only wears blue mascara and wears her hair in a high top bun with a scrunchie. She loves a good challenge and down for a little competition and is easily one of the strongest girls in the gym!

MORGAN WITHERS
Coach
Gym Intern
On Ramp Coach
Coach Morgan has been a member of RxFIT since 2018! She is a student at BYU studying Information Systems in the Marriott School of Business. Morgan is currently interning at the gym and holds the responsibility for Social Media, On- Ramp Sessions, and overall Marketing.
[email protected]

Darren
CrossFit L1
Darren is our Springville and Provo manager. He's an impressive athlete and has been coaching and inspiring athletes since 2018. Darren is a farm boy at heart. He loves the outdoors, playing hard, working hard and spending time with his wife (Janessa), his puppy (Hobbes), and soon-to-be-born son. The nicest guy at the gym; let him know how he can improve your experience at RxFIT! My Deadlift is 535lbs and I can do 30 Ring Muscle Ups FT in 1:33.

TYLER WELCH
Owner
[email protected]

MARK MCKELLAR
Owner
[email protected]