Iron Oxygen Fitness is a busy place, with about 5500 members working out to stay fit.

The former Best Fitness complex on West 12th Street was purchased about a year ago by Matt and Anthony Pribonic, owners of nearby Fitness U, formerly  Nautilaus.

At Iron Oxygen, personal trainers form a close bond with their clients.

Member Loretta Nosko said, "I have tried other gyms before, I really have. This one, the atmosphere is just wonderful. They don't criticize, they work with you when you have a problem. They will help you work through it."

Owner Matt Pribonic said, "If you are positive and putting out that energy, your customer base will go up. It is one thing with the company culture that you really need to have firing for you."

While the staff is important, members also want top notch equipment, and plenty of it.

Matt Pribonic said, Iron Oxygen Fitness has probably the greatest variety of equipment for any fitness level. Having this variety of equipment it definitely positions us well to be able to help members coming in for years to come, and we are always adding."