We Break the Mold

No membership required, no registration fees, no cancellation fees.

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Challenging and Empowering

For ALL Levels of Fitness

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Maria Guerra

Founded by Celebrity Fitness Trainer and BURN™ Creator

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Nutritional Plans Available

Maria is certified as a Weight Management Specialist. Appointments are available to obtain a personal nutrition plan. A version of this is already included in the BURN™ program.

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Booking a Class

has never been easier!

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Hard Core Fitness Studio App

Booking Just Got A Lot Easier!

Available in Apple StoreAndroid App at Google Play

At Hard Core Fitness Studio, we are committed to inspiring you towards fitness and

overall wellness with challenging programs in  an empowering environment.

We aspire to always provide:

  • A Welcoming, Non-Intimidating Environment
  • Challenging and Dynamic Classes
  • Fitness and Nutrition Education
  • A Clean and Well-Equipped Studio
  • A Professional and Considerate Staff
  • Affordable and Accessible Programs

Our Beautiful Location

Located in the beautiful Lake Forest Gateway,
23600 Rockfield Boulevard, Suite 2A,
off the Lake Forest exit,  where the 5 and 405 Interstates meet.

Hard Core Fitness Studio

Hard Core Fitness Studio Breaks the Mold

 We offer exciting and effective group fitness classes throughout the day,
so there will always be something for you!

What Makes Us Different? Learn More...


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Full List of Classes

Meet Our Trainers


Creator of BURN™ and Co-Founder of Hard Core Fitness Studio

Maria has been a successful group fitness instructor for over 12 years. She started by teaching kickboxing and cardio salsa for various local gyms in Orange County. Throughout the years, she has also taught club boxing, bootcamp, Zumba, kettlebell training, weight training, indoor cycling, yoga and pilates.  She has since created her own High Intensity Fitness Program, BURN™. Hard Core Fitness Studio is the culmination of Maria's experience and passion for fitness and empowerment through exercise.

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Zumba Gold




Jam Session Cycling


Ride or Die Cycling


Circuit Training


Kids / BURN / Zumba

Get to Know Our Trainers

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