Where is HIIT AF located?

HIIT AF is at 8160 Haven Avenue Suite 102 in Rancho Cucamonga, California 91730. We're just south of Foothill Boulevard on Haven, with free parking right out front and easy access from the 210 and 10 freeways.

How much does HIIT AF cost?

Unlimited monthly membership is $139 per month, with no contract — cancel anytime. A 10-class pre-paid pack is $300. Your first class is free, so you can try us before you commit.

Is the first class really free?

Yes. Your first 45-minute HIIT AF class is completely free with no obligation. Book online or walk in 10–15 minutes early and a trainer will get you set up.

How long is each HIIT AF class?

Each session runs 45 minutes. A new class starts every 45 minutes during operating hours. Members wrap their hands and stretch out before jumping into the 10-station circuit.

Do I need experience to start at HIIT AF?

No experience is required. A trainer is on the floor with you from the first minute to the last, demonstrating every movement and modifying it to your level. First-timers, athletes, and people returning after years off all train side by side.

Is HIIT AF good for weight loss?

Yes. The combination of kickbox HIIT and full-body strength burns 500–700 calories per 45-minute session and builds lean muscle. Member Gina R. lost over 60 pounds training with us.

Are kids classes available at HIIT AF?

Yes. We run Kids Kickbox small-group training that combines age-appropriate boxing and kickboxing technique with strength and conditioning. It builds confidence, discipline, and self-defense fundamentals.

Are there age restrictions?

We welcome all ages in our group classes. For kids under 10, we recommend our 1-on-1 personal training so they can build fundamentals before joining the circuit.

Do you offer 1-on-1 personal training?

Yes. We offer 1-on-1 personal training built around your specific goals — weight loss, conditioning, strength, or boxing and kickboxing technique. Schedule is flexible.

Do I need my own boxing gloves?

No. We provide loaner gloves that are sanitized after every use. You're welcome to bring your own if you'd rather.

What should I wear to HIIT AF?

Wear comfortable workout clothes with closed-toe gym shoes. Bring a water bottle and a small hand towel. No special equipment needed for your first class.

Should I arrive early for my first class?

Yes — arrive 10 to 15 minutes before class starts. Your trainer will walk you through the station layout, get you fitted with gloves, and answer questions before the warm-up.

What's the closest HIIT gym to Upland?

HIIT AF is roughly 4 miles east of Upland on Haven Avenue, about a 10-minute drive via Foothill Boulevard. It's the closest kickbox and strength HIIT studio for Upland residents.

What's the closest HIIT gym to Ontario?

HIIT AF is about 5 miles north of central Ontario at 8160 Haven Ave in Rancho Cucamonga — roughly 10 minutes via Haven Ave or the 10 Freeway.

What's the closest HIIT gym to Eastvale?

HIIT AF is approximately 7 miles north of Eastvale, about 15 minutes via the 15 Freeway and Foothill Boulevard.

Does HIIT AF have parking?

Yes. Free surface parking is available directly in front of the studio at 8160 Haven Ave Suite 102, with overflow parking throughout the plaza.

Is HIIT AF beginner friendly?

Completely. Most of our members started with zero combat-sports or HIIT background. Every movement is demonstrated, every station has a modification, and a trainer is always on the floor.

Kickbox & Strength Training

Train
Different.

45-minute high-intensity sessions combining kickboxing and strength training. 10 stations. No experience required.

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Steven Liu performing a high kick at HIIT AF

What is HIIT AF?

HIIT AF is a kickbox and strength high-intensity interval training studio in Rancho Cucamonga, California. Each 45-minute class combines boxing, kickboxing, and full-body strength training across 10 stations, with a trainer on the floor guiding you from start to finish. The program changes daily, so you never plateau, and every fitness level is welcome — your first class is free.

Minutes

Stations

Experience Required

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Trainers

Steven Liu brings 40 years of Tae Kwon Do experience and a decade of expertise as the owner and operator of a Kickbox Fitness gym from 2015 to 2025. Shantay, a dedicated kickboxing and strength trainer with 6 years of experience, shares Steven's passion for fitness.

Together, they are committed to empowering individuals to achieve their short- and long-term health and wellness goals through motivation, determination, and personalized guidance.

Meet the Team

HIIT AF Trainers — Steven Liu and Shantay

Services We Provide

1-on-1 Personal Training

Customized sessions focused on your specific goals—whether that's weight loss, conditioning, strength building, or mastering boxing and kickboxing technique.

Personalized workout programming
One-on-one trainer attention
Flexible scheduling
Goal-specific training plans

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Kids Kickbox Small Group Training

Fundamental boxing and kickboxing techniques combined with strength and conditioning exercises. Perfect for building confidence, discipline, and self-defense skills in young athletes.

Age-appropriate techniques
Small group environment
Self-defense fundamentals
Builds confidence & discipline

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Kickbox + Strength HIIT Group Classes

Our signature offering. A 45-minute circuit across 10 stations combining boxing, kickboxing, and full-body strength training. Every day is a different workout—so you never plateau.

45-minute sessions
10-station circuit
Daily program variation
Trainer-guided throughout

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Membership Plans

Frequently Asked Questions

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What Members Say

Testimonials

5.0 rating · 4 member reviews

The trainers are always motivating and I appreciate that every workout is unique, which keeps me engaged and motivated. For me, it's not solely about losing weight (though I've lost over 60 lbs), but also about supporting my mental well-being and feeling strong and confident. This gym has truly become a second home. Thank you HIIT AF — you guys are amazing!

Gina R.HIIT AF Member

ABSOLUTELY LOVE HIIT AF!!! I've always been afraid to go to the gym because I had no clue what I was doing. My mom and I decided to give HIIT AF a try and it's a fun activity for us to do together — it gave us both the confidence to work out alone too. Working out is actually fun! The workouts are already preplanned (making it less stressful) and Steven & Shantay guide you through it all (making the experience more personable).

Victoria H.HIIT AF Member

My favorite gym ever! The trainers are great at supporting you to reach your goals, while pushing you to achieve more than you think you can. The workouts are full body, and a lot of fun. The atmosphere makes you feel comfortable and confident in working out and reaching your goals. Could not recommend enough!!!

Sam F.HIIT AF Member

If you want a place where you can feel safe, encouraged, empowered, and championed, then you want to try out this facility. I participated in a team challenge where we got to know each other and bond — by the end I had lost weight, gained strength, and learned how to carry confidence! I enrolled my daughter (age 12) and she tells me how happy she is going to HIIT AF because she's learning skills that make her feel confident. You will not be disappointed with these trainers — absolutely amazing people who care about everyone!

Devin B.HIIT AF Member & Parent

Ready?

Your first class is on us.

Walk in, try a session, and see why our members never look back. No commitment. No pressure. Just 45 minutes of work.

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TrainDifferent.

What is HIIT AF?

Trainers

Services We Provide

1-on-1 Personal Training

Kids Kickbox Small Group Training

Kickbox + Strength HIIT Group Classes

Membership Plans

Frequently Asked Questions

Testimonials

Your first class is on us.

Train
Different.