
Coached, tracked, and built for adults 40+.
Underground Gym is a personal training studio on Route 35 in Red Bank. We help adults over 40 get stronger, lose weight, and move better, with less pain — with a coach watching every session and a program built around your body, not a generic workout. Every session is planned, coached, and tracked, so you can see yourself progressing week after week.
★★★★★ 4.9 from 114 Google reviews — 'Sergei and his staff are experienced, attentive and always encouraging.' — Mike Luzio, member

Private 1-on-1 personal training — A program built entirely around you: your goals, your schedule, your injuries and limitations. The fastest, most personalized way to train.

Strong Again — small group personal training — Your own program, coached in a small group. You get personal attention and real progression at a lower cost than 1-on-1, plus the energy of training with people like you.
PRIME 30 — 30-minute sessions — A full coached workout in 30 minutes. Built for busy adults 40+ who want results without living in the gym. Over 35 sessions a week, mornings through evenings.
Fit Over 40 — Our flagship approach for adults over 40, under the Stronger After 40 umbrella. It isn't locked to one format: your plan can combine personal training, small-group sessions, and group training — we match the mix to your goals, your body, and your schedule at the consultation.
Consultation — We talk through your goals, health history, and what has or hasn't worked before.
Assessment — An InBody body-composition scan and a movement screening, so your plan starts from facts, not guesses.
Your plan — You get a clear path: the right format, the right schedule, and exactly what to do next. Then we coach you through it, session by session.
















1. It starts with an assessment, not a workout. — We start with data, not assumptions. Your assessment looks at your body composition, how you move, and what your health history says — because two people with the same goal rarely need the same plan. From it, your coach builds your blueprint: the training, nutrition guidance, and recovery priorities that make up your Stronger After 40 plan.
2. Strength first, joints protected. — We build strength first and protect your joints while doing it. After 40, more exercise isn't better — better strategy is.
3. Every session is coached and tracked. — No wandering the floor guessing. A coach runs every workout, and every session is recorded, so your program progresses on evidence, not memory.
4. Small by design. — Train fully private 1-on-1, or in Strong Again small groups capped at 7. You'll never wait for equipment or get lost in a crowd.
5. Progress you can measure. — Regular InBody scans show exactly what's changing — muscle, body fat, the numbers that matter — so you see it, not just feel it.
6. Built for real bodies. — Backs, knees, shoulders, blood pressure, old surgeries — most members arrive with something. Your program is built around your body and adjusted every session.
7. No long contract. — Week-to-week options mean we earn your training every single week. The plan has to keep working — or you walk.
Kettlebell training is one of our core tools, coached from your first hip hinge.
Underground Gym holds a 4.9-star rating across 114 Google reviews — more reviews than any personal training studio in the Red Bank area.
"Sergei and his staff are experienced, attentive and always encouraging while challenging you, making sure that every student is safely performing each exercise." — Mike Luzio
"I highly recommend Underground gym for any age but especially those who need to get back in shape or have never worked out before" — Mike Luzio
"If I could give the Underground gym in Red Bank 10 stars I would!" — Claudette A.
Our members train with us from Red Bank, Middletown, Rumson, Fair Haven, Little Silver, Shrewsbury, Holmdel, Tinton Falls, and Colts Neck. The studio is at 327 Hwy 35 in Red Bank, with morning sessions from 6 AM and evening sessions through 8 PM.
I've never lifted weights. Is this for me? — Yes. Most of our members had never trained before they started. Your coach teaches you every movement, and your program starts where you are.
What if I have back pain or joint problems? — Tell us in the consultation. We build your program around it and modify exercises as we go — training around pain is one of the main reasons people come to us.
Is 30 minutes with a personal trainer enough? — Yes — when every session follows your plan. PRIME 30 packs a complete coached workout into 30 minutes, mapped to your program: no wasted sets, no filler. With 35+ sessions a week from 7 AM to 7:30 PM, most members train 3 to 5 times a week and watch their progress on InBody scans.
Is 3 months of personal training enough? — Three months is enough to build the habit, learn the movements properly, and see your first measurable changes. After that, your program keeps evolving as your body adapts — most of our members stay well past the first three months because the plan keeps progressing with them.
How much does it cost? — It depends on the format you choose — 1-on-1, small group, or PRIME 30. Options start at $45 a week and are week-to-week, with no long contract. Your consultation ends with an exact price for the plan that fits you.
How often should I train? — Most members train 2–3 times a week. PRIME 30 members get a complete workout in 30 minutes, so even twice a week moves the needle.
Where are you located? — 327 Hwy 35, Red Bank, NJ 07701. Call us at (732) 693-0287.
Sit down with us, get your InBody scan and movement screening, and leave with a clear plan — whether you join or not.
(732) 693-0287 · 327 Hwy 35, Red Bank, NJ 07701

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.