Relentless Fitness

Relentless Fitness Relentless Fitness LLC, Personal Training Facility. Relentless Fitness is an exclusive personal training facility.

We are a no membership facility and are by appointment with a trainer only. We have 8000 sq ft of personal training space with equipment optimized for personal training with our certified personal trainers. Our Relentless Fitness personal trainers have a wide array of specialties to fit your health and fitness needs such as weight loss, Olympic lifting, power lifting, body building, physical therapy, and much more!

✨ Welcome to the RF Fam, Lo! ✨We’re excited to welcome Lo Blackwell, owner of Sparkle Motion Personal Training, to Relen...
09/22/2026

✨ Welcome to the RF Fam, Lo! ✨
We’re excited to welcome Lo Blackwell, owner of Sparkle Motion Personal Training, to Relentless Fitness! #
Lo is an ACE-certified personal trainer with nearly a decade of experience in the fitness industry, along with a specialty in prenatal and postpartum corrective exercise.
Her approach is all about creating a safe, welcoming space where people of all backgrounds and abilities can build strength, confidence, and a better relationship with movement.
Her goal is simple: move well, move joyfully, and move more!
We’re excited to have you here, Lo! 💪 Welcome to Relentless! 🖤

09/18/2026

Literally every rush hour at a big box gym 😅
Meanwhile at Relentless Fitness: room to train, no fighting for equipment, no dodging people mid set, workouts that actually get results 😎

Train smarter. Train private. Train Relentless.


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!WELCOME TO THE RF FAM, KAILEE! We’re excited to welcome our newest trainer, Kailee, to Relentless Fitness! Kailee is a ...
09/14/2026

!WELCOME TO THE RF FAM, KAILEE!
We’re excited to welcome our newest trainer, Kailee, to Relentless Fitness!
Kailee is a NASM Certified Personal Trainer with specialties in Nutrition Coaching, Corrective Exercise, and Performance Enhancement. With 18 years of dance experience, she brings a unique focus on movement quality, body awareness, strength, and confidence.
Her training style is all about purposeful, personalized workouts that help you get stronger, improve body composition, move better, and feel more confident in the gym without making fitness more complicated than it needs to be.
Whether you’re brand new to training or have been working out for years, Kailee believes fitness is a practice: show up, put in the work, learn your body, and keep progressing.
We’re pumped to have her on the team! Help us give Kailee a big WELCOME TO RELENTLESS!
Interested in training with Kailee? Send us a message or reach out to learn more!

09/10/2026

Trust me, We are professionals 😎
Also… EAGLE!🦅


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09/01/2026

Ma’am… I have been trying to get bulky this entire time. Please tell me your secrets. 😂

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08/27/2026

I’m tired of this grandpa…

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08/25/2026

Welcome to Relentless Uber! No excuses. Just awkward car rides and no time for excuses.


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Address

4701 Delor
St. Louis, MO
63109

Opening Hours

Monday 5am - 10pm
Tuesday 5am - 10pm
Wednesday 5am - 10pm
Thursday 5am - 10pm
Friday 5am - 10pm
Saturday 6am - 8pm
Sunday 8am - 6pm

Telephone

+13143999260

Website

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