Memberships
Gym Memberships & Pricing
24/7 Gym • CrossFit • Personal Training
More than just a gym.
O.N. Athletics gives you the flexibility to train independently 24/7, follow coach-led CrossFit programming through CrossFit DYR, or work one-on-one with a personal trainer, all under one roof.
24/7 Open Gym
Round-the-clock member app access to the full 7,200+ sq. ft. floor: free weights, racks, platforms, machines, cables, cardio, open training area, and sauna. Train independently whenever your schedule allows.
What open gym includesCrossFit DYR Classes
Coach-led CrossFit classes for beginners through experienced athletes, scaled person by person. 24/7 open gym access is included, so you can train on your own between classes.
See how classes runPersonal Training
One-on-one coaching with programming written around your goals. Single sessions and multi-session packages available, with 24/7 gym access included with personal training memberships.
How training worksMembership options and pricing vary depending on the level of access and how often you train. Your free intro is the fastest way to find the right fit.
Military/veteran, first responder, Electric Boat, senior, and family rates are available, ask at your free intro.
Nutrition coaching, youth athletics, and recovery services are available as add-ons.
Try Us First
Not ready to commit? Come experience O.N. Athletics for yourself with a $15 open gym drop-in.
Get Your $15 Drop-InIntentionally Limited Membership
We deliberately cap membership to help reduce overcrowding and maintain a comfortable training environment with better access to equipment and training space.
Common Questions
Membership Questions
Open gym covers 24/7 member app access to the full floor and sauna, starting at $45/month. CrossFit DYR class memberships add coach-led classes on top of that access, starting at $150/month. Personal training adds one-on-one coaching and custom programming, starting at $70/session, and also includes 24/7 access.
We offer special rates for military/veterans, first responders, Electric Boat employees, and seniors, plus family plan pricing with savings of up to 30%.
Yes. Your first intro session is free, and a $15 open gym day pass lets you train on your own for a visit before you commit.
We deliberately cap membership to help reduce overcrowding and maintain a comfortable training environment with better access to equipment and training space. Early evening is our busiest window, and the quietest hours are late night and early morning.
Absolutely. Your first visit is always free if someone wants to come check out O.N. Athletics and see if it's the right fit. Guests can complete the guest waiver at the front desk before training.
If you have a regular training partner, guest pass memberships can also be added to your membership, allowing you to bring a training partner with you whenever you work out.
And if your guest decides to become a member, you can earn cash through our referral program. We offer generous referral bonuses for members who send new people our way.
Still Not Convinced?
We'll make it easy
Still Not Sure Which One?
Book a free intro and we’ll help you pick.
Compare the 24/7 gym in Groton, strength training, CrossFit DYR, and personal training in Groton.
Find Us
Come Visit Us
Address
800 Flanders Road, Building 9 Unit 5
Mystic, CT 06355
Serving Groton, Mystic, Noank, Stonington, New London, Ledyard, Gales Ferry & Southeastern Connecticut
Directions & Parking
Off Flanders Road, connecting to Routes 184 and 1, minutes from downtown Mystic and a short run from I-95, Noank, Stonington, New London, and Naval Submarine Base New London. Free on-site parking directly outside the door.
Get driving directionsCall or Text
(860) 415-4909Hours
Open 24 Hours7 Days a Week
24/7 member access through our member app