O.N. Athletics is a 24/7 gym serving Groton and Mystic, Connecticut, offering open gym access, strength training, CrossFit, personal training, and recovery amenities. Our 7,200+ square foot facility provides a clean, fully equipped training environment for beginners, experienced lifters, and athletes. Members have 24/7 access to strength and conditioning equipment, Olympic lifting platforms, free weights, machines, open training space, and... Read More about O.N. Athletics | 24/7 Gym + CrossFit Dyr