Forge Fitness Gym OC RSM | Strength Training & Performance
| Smaller Group Class Gym | Rancho Santa Margarita
Forge Fitness is Rancho Santa Margarita’s premier strength and performance small-group class gym, all you have to do is show up we take care of the rest. Specializing in safe, science-based with expert coaching and structured programming. Our 360° Body Development Program focuses on joint-friendly strength training, measurable progress, movement enhancement and overall athletic performance. From VO2 max testing and advanced 3D A1 body scans to in-house nutrition specialists, we provide everything you need to build a strong, healthy body that no only looks good but moves well—designed to increase longevity and improve overall quality of life.
What People Are Saying About Forge
I recently switched from Orange Theory (OTF) to Forge Fitness.
“While I’m eternally grateful to OTF for getting me back on the fitness track, the change feels like going from high school to a university program, with a lot more breadth (much more than just dumbbells and TRX) and depth (more emphasis on form and tracking) at Forge, particularly for strength training. Lots of attention from the instructors (whose credentials are impeccable), and a very involved owner."
Jon Nakamoto
At Forge, we focus on teaching correct technique and movement quality. Safe training matters — but proper execution is what delivers real results. Every movement has a purpose. If you’re not doing it right, you’re not getting the benefit.
50 Min Group Class Times :
5:00 AM, 6:00 AM, 7:00 AM, 8:30 AM, Midday, 4:30 PM, 5:30 PM
SPECIALIZE TEACHING
TECHNIQUE + FORM
SMALLER GROUP CLASS
STRENGTH & PERFORMANCE
CARDIOVASCULAR
HEALTH
STRENGTH TRAINING
BODY DEVELOPMENT
FREE NUTRITION
TRAINING
World Class Smaller Group Strength Training & Personal Training
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💪We specialize in training correct movement.
This is real training—it’s like having your personal trainer by your side, teaching you every movement with precision. Your guide to hold you back when needed, then push you forward exactly when you're ready.
Our expert certified trainers focus on movement quality—demonstrating each exercise with precision.
🥗Free - 360 Training Nutrition + Fitness + Lifestyle Program
Scientifically proven, it takes 100% commitment in all areas to achieve optimal physical fitness. That is why we focus on a 360 Training Program, encompassing both training inside Forge and lifestyle habits outside the gym.
Correct lifestyle, nutrition and protein play the largest part. While cardiovascular exercise is important for internal health, strength training is necessary to alter body composition. But cardio and strength are not sustainable weight loss tools on there own and should never be promoted as such.
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🗓️Streamline Your Fitness Journey with Forge Fitness RSM Gym App.
Effortless - Community
Communication & Scheduling: With our app, you can book classes, view movement videos for coming classes, post and chat with the Forge family - all within the Forge App with just a few taps on your smartphone. Your personal program lives in the app—track your progress, see your data, and view real results.
External and Internal Body Scans
No guessing games or the inaccuracy scales. InBody Test and A1 FIT3D Body Analysis. One focuses on internal body changes — things like fat mass, lean mass, and health markers — typically used at the start and then periodically to track deeper physiological progress over time. The other focuses on external body composition — muscle development, shape, posture, and symmetry — allowing us to track visible changes regularly and compare progress over any time period.
The Gold-Standard TesT
VO₂ Max Testing
The gold-standard assessment of your cardiorespiratory fitness and long-term health. Regardless of your performance or longevity goals, VO2 Max is one of the most important metrics you can know.
Forge Fitness offers Orange County’s only mobile VO₂ Max testing, allowing real-world testing at your convenience—not just in a lab. This means more accurate, applicable results.
—targeting exactly what limits your performance in your given discipline.
Heart Rate Training
We've made our system compatible with your Apple watch, chest and arm monitors from Orange Theory, F45, My Zone, and most other brands. At Forge, you can simply use your own if you already have one. Also compatible with some monitors that you can purchase on Amazon for around $35.