Signature Fitness is The Elite Name In Fitness. With two locations in Belleville and Whippany, Signature Fitness is always an option if you are a Northern New Jersey resident. We offer such services as revolutionary Kinesis training, boxing, personal training, and a wide variety of yoga and fitness classes. A fully stocked Extreme Blendz juice bar and sauna will help you relax after your workout. We offer free child care as well so you will not have to worry about your kids during your workout.