Mon / Wed / Fri · 8:30 AM
Boutique HIIT Studio
Become Stronger.
Feel Better.
Join the High In10sity Family.
Experience your first class completely FREE. Meet our coaches, train with an encouraging community, and discover why so many people choose High In10sity Fitness.
Locally Loved Supportive Community
Why High In10sity
A studio built around your results.
Expert Coaching
Certified coaches who actually coach — adjusting form, intensity, and progress to fit you.
Welcoming Community
Walk in a stranger, leave a regular. Our members genuinely cheer for each other.
Results for Every Level
From your first burpee to your hundredth PR — programming that meets you where you are.
12+ yrs
Coaching Experience
Meet Danielle
Meet Danielle Sandoval
Danielle Sandoval is the founder, choreographer, and owner of High In10sity Fitness. A devoted wife and proud mother of three beautiful daughters, Danielle has dedicated her life to helping others become stronger, healthier, and more confident through movement.
Her passion for fitness began at just three years old as a gymnast and dancer. She went on to become a top competitor in Colorado's 5A gymnastics division and attended the prestigious Denver School of the Arts, where she continued to develop her love for performance, creativity, and athleticism.
Today, Danielle combines decades of experience with an encouraging coaching style that empowers people of all fitness levels. Through her popular YouTube channel, Fitness by Danielle, she has inspired and trained thousands of people around the world with fun, effective workouts that make fitness both challenging and enjoyable.
Beyond her online community, Danielle is passionate about serving her local community through High In10sity Fitness, where she creates an environment that is welcoming, supportive, and focused on helping every member reach their goals. Whether someone is taking their very first class or pushing toward new personal bests, Danielle believes fitness should build confidence, create lasting friendships, and improve lives both inside and outside the gym.
Programs
Find the class that moves you.
Every new member is invited to experience a FREE class before deciding if High In10sity Fitness is the right fit.
Mon / Wed / Fri · 8:30 AM
Mon–Thu · 6 PMEvening HIIT
Burn off the day. High-energy circuits with great lighting and better playlists.
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Mon / Wed / Fri · 9:45 AM
Mon / Wed / Fri · 11 AMBeginner Friendly
Zero pressure, full coaching. 45-minute classes to learn movements and build confidence.
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Saturday · 9:30 AMClass Schedule
Your week, scheduled.
View the full live calendar and reserve your spot in seconds through our member portal.
Monday
- 8:30 AM Intermediate HIIT
- 9:45 AM Advanced HIIT
- 11:00 AM Beginner HIIT
- 6:00 PM All Levels HIIT
Tuesday
- 6:00 PM All Levels HIIT
Wednesday
- 8:30 AM Intermediate HIIT
- 9:45 AM Advanced HIIT
- 11:00 AM Beginner HIIT
- 6:00 PM All Levels HIIT
Thursday
- 6:00 PM All Levels HIIT
Friday
- 8:30 AM Intermediate HIIT
- 9:45 AM Advanced HIIT
- 11:00 AM Beginner HIIT
- 6:00 PM All Levels HIIT
Saturday
- 9:30 AM All Levels HIIT
Sunday
Today- Rest Day
Live Calendar
Reserve your spot in the live calendar
Our class calendar is hosted in our secure member portal. Tap below to view real-time availability and book your class.
Member Transformations
Real people. Real change.
Real member result
Leaner, stronger, more confident
"The coaching and community changed everything for me."
— High In10sity Member
Real member result
Down the weight, up the strength
"I finally found a place that pushes me and cheers me on."
— High In10sity Member
Real member result
Stronger, healthier, unstoppable
"I never thought I could feel this good in my own body."
— High In10sity Member
I just attended my first class and I have to say it was one of the best classes I’ve taken in a very long time. I love cardio and I love weightlifting. This was a perfect mix of both. The instructor is very motivating and keeps you going I definitely will be coming back.
Jordan Vera · Google Review
I love the workouts and the Great vibes we hace so much fun ❤️❤️❤️
araceli galeana · Google Review
I have had the privilege of working out with Danielle for 6+ years! She is an excellent trainer! Danielle has provided me with the knowledge and has motivated me in making progress towards my goals. I highly recommend her classes!
kimberly miller · Google Review
If you’re looking for a gym that pushes you to be your best in a motivating, welcoming environment, High In10sity Fitness in Thornton is the place to be — and Danielle Sandoval is the reason why. Danielle brings the perfect balance of intensity and encouragement to every class. She has a gift for reading the room, pushing when needed and offering modifications without hesitation. Her energy is contagious, and she creates a space where everyone — no matter their fitness level — feels supported and challenged. What really sets Danielle apart is her attention to form and detail. She genuinely cares about your progress and takes the time to correct and guide in a way that builds confidence and prevents injury. Danielle delivers every session with knowledge, passion, and a positive attitude. Highly recommend!
Natalie Kilburn · Google Review
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Pricing
Start free, then pick the plan that fits your life.
Your first class is completely free — no commitment, no obligation.
Most Popular
Free Class
Experience a full High In10sity Fitness workout at no cost. Train with expert coaches, feel the energy, and see why our members love training here.
Freefirst visit
- One complimentary HIIT class
- Coach-led workout experience
- Welcoming community support
- No obligation, no credit card
Unlimited Monthly
For members who show up daily.
$129per month
- Unlimited classes
- Priority booking
- Member-only events
- Free guest passes
1-on-1 Coaching
Personalized training for serious results.
$249starting at
- Custom programming
- Weekly check-ins
- Nutrition accountability
- Flexible scheduling
FAQ
Got questions?
Contact
Come say hi.
Stop by for a tour or shoot us a message — we'd love to meet you.
Visit
8512 Pearl St Thornton, CO 80229
Call
720.306.9004
danielle.sandoval01@gmail.com
Hours
Mon–Fri 5:00a–8:00p Sat–Sun 7:00a–12:00p
Your first class is completely free.
No commitment. No credit card. Just show up — we'll handle the rest.