It may be cooling down outside, but the indoor pools at the Cumming Aquatic Center remain busy.

Carla Wilson, manager of the facility off Pilgrim Mill Road, said sign-ups are under way for the center’s winter session, which begins at the end of this month and runs through Dec. 31.

The $15-million facility opened this summer and staff recently completed its first session of classes and swim lessons.

“Now that we have one session under our belts, we’re able to offer a wider variety of classes and programs,” Wilson said.

Wilson said after the first session, she and her staff were able to determine which classes were the most popular to provide schedules that better meet the community’s needs.

“Our water exercise classes were especially popular, so we’re offering more of those,” she said.

One of the most popular classes, she said, is the Aqua Belt Cardio, a deep-water, intensive workout.

“We’re really the only center in the area to offer that class,” she said.

This session, the center also has more Aqua Sculpt and Aqua Zumba classes, Wilson said.

“[Aqua Sculpt] are low-intensity classes that focus on range of motion,” she said. “[Aqua Zumba] was probably the most popular class we offered.”

The class is a water version of the popular workout that uses Latin music and dance moves.

Anyone interested in the water exercise classes can try as few or as many as they would like.

Wilson explained the center sells individual passes for the classes. A pass for one class is $7 or a package of 10 can be purchased for $63.

“But they don’t have to take ten of the same class,” she said. “They can go to as many different classes as they want.

“This way, they can try a lot of different things out to see what works best for them.”

In addition, she said, the passes are good for one year. “So there’s no rush. They don’t have to use them during one session.”

The center has also expanded its swim lesson schedule for the winter.

“We have lessons for everyone from 6 months all the way to 99 [years old],” Wilson said.

Besides group swim lessons, the center also offers private and semi-private lessons.

Wilson explained private lessons are one on one with an instructor, while semi-private lessons include two students with one teacher.

The center’s two indoor pools will be openly daily for lap swimming all winter.

“We’ve expanded our hours, so we are open later in the evenings,” she said.

Wilson encouraged anyone who hasn’t visited the center to check out the offerings.

“There really is something for everybody,” she said.