The ‘Supermodel Workout’

Participants work out with a four-pound exercise ball during a ModelFIT sculpt class.

Vanessa Packer, left, Trew Mullen, Karissa Rowe, Kacy Hill and Taylor Osumi work out with a four-pound exercise ball. Packer is the founder of ModelFIT.

Trainer Keely Ahrold, right, leads participants in a ModelFIT sculpt class. At left is Vanessa Packer, founder of ModelFIT.

Trainer Keely Ahrold, second from left, instructs participants in a ModelFIT sculpt class as they use bands to create resistance.

Trainer Keely Ahrold, center, does a routine using a four-pound exercise ball while leading a ModelFIT sculpt class.

Kacy Hill, left, and other participants in a ModelFIT sculpt class work out with Pilates rings while using bands to create resistance.