Welcome to San Diego's Strongest Gym

Grinder Gym caters to any individual who is serious about achieving their fitness goals. Our gym has been called the “Epicenter of Body Transformation” due to our expertise in transforming the body. Whether you’re looking to lose fat and inches, improve your strength, athletic performance, or just look better naked, we have what you need. 

Periodically we may offer a complimentary trial workout to test drive a class or a trial period to see if our Open Gym is a good fit for your training needs. However, we must limit the number of trials we offer based on the capacity of the gym and its current usage.

You are welcome to contact us to see if we have an active trial available at this time.

Any active FREE TRIAL MEMBERSHIP OR CLASS will only be for San Diego residents. If you are an out-of-town guest on vacation looking to drop in, you must purchase a daily drop in or a 1-week membership. 

If a free trial is currently available the following will apply:

• Once we complete your registration a Guest Pass will be sent directly to your email.
• Check in at the front desk and have your Guest Pass pulled up on your phone.
• Start date for Guest Pass only begins once you have met with a Grinder Gym Fitness Consultant.
• Meeting with a Grinder Gym Fitness Consultant is required for the trial to be activated and takes 20 to 30 minutes by appointment.

*Some restrictions may apply. Call for any questions on restrictions. First time guests only. Must be at least 18 years of age with valid photo ID or 14-17 years of age and accompanied by parent/legal guardian while in Grinder Gym. Local residents only. Must reside within 25 miles of Grinder Gym to be eligible for guest pass. Photo ID required. Guest Pass is only valid during operation hours. Grinder Gym reserves the right to refuse service to anyone. Guest Pass may not be combined with any other specials or trials. All trials are based on gym occupancy and subject to change without notice.