
No generic workouts. No wasted effort. Just intelligent training built around your metabolism.


No generic workouts. No wasted effort. Just intelligent training built around your metabolism.

Every body is different.
Every goal requires a different strategy.

Our Signature Program
Best for: Fat loss, low energy, metabolic issues, plateaus
A fully personalized system designed to reset how your body functions—not just how it looks.
Includes:
Comprehensive metabolic assessment
Personalized training & nutrition strategy
Biomarker-informed guidance
Ongoing optimization & accountability
Ideal if you want sustainable fat loss, improved blood markers, and long-term metabolic health.

Structured. Safe. Effective.
Best for: Getting leaner, stronger, and healthier after 40
A guided training program built specifically for adult bodies—no extreme workouts, no burnout.
Includes:
Age-appropriate strength training
Mobility and joint support
Metabolic conditioning
Professional coaching & progression
Perfect if you want structure, results, and expert guidance without customization overwhelm.
Best for: Personalized support, accountability, faster results
Private coaching built entirely around you.
Includes:
Customized workouts
Technique correction & injury prevention
Goal-specific programming
Ongoing progress tracking
Best for clients who want maximum attention and fully individualized training.
Train Without Fear
Best for: Chronic back pain, past injuries, movement limitations
A corrective, strength-based approach to help you move better—and train with confidence.
Includes:
Movement assessment
Targeted corrective exercises
Core and stability training
Progressive strength rebuilding
Designed to reduce pain, restore function, and prevent future setbacks.
High-Level Coaching. Shared Energy.
Best for: Motivation, consistency, community
Small groups with professional coaching and personalized attention—without the price of 1-on-1.
Includes:
Limited group sizes
Structured strength & metabolic training
Coaching cues and form correction
Supportive, like-minded community
Ideal if you want accountability, energy, and expert guidance in a group setting.
Not Sure Where to Start?
The philosophy behind mobility, strength, balance, longevity
Why this approach is safer and more effective than cookie-cutter programs
Founder & Head Coach
Sergei Karaliou is the Founder and Head Coach of Underground Gym, where he specializes in metabolic transformation for adults over 40.
With more than 20 years of professional coaching experience, Sergei has worked extensively with high-performing professionals navigating weight gain, low energy, metabolic dysfunction, and the physical toll of chronic stress.
He is the creator of the Metabolic Age Reset System™, a science-driven methodology that integrates body composition analysis, biomarker-informed nutrition, intelligent strength training, and recovery optimization. His work focuses on restoring metabolic function - not just driving short-term weight loss....

Distance learning
Can't make it to Underground Gym's Red Bank location? Don't worry we offer online training.

Programs designed for you
We employ a comprehensive holistic Training System that addresses each person on the individual level.

We succeed when you succeed
Our professional success depends on your personal sports, fitness and life achievements.
















There is no time like the present to start working on your personal wellness, health & fitness goals. The personal trainers and conditioning coaches of Underground Gym can help you reach your goals. Contact us today to schedule a FREE training consultation.
Сontact us
(732)693-0287
Underground Gym
327 Hwy 35, Red Bank, NJ 07701
Start Training Today: (732)693-0287

Burn fat, build muscle and take your training to the next level at Underground Gym. Push your body to the limit and get the results that you want! There is no time like the present to start working on your personal strength and fitness goals. Take the next step and talk with a fitness professional about a FREE training consultation.
