In advance of its 100th anniversary next year, Everlast Worldwide is capitalizing on the popularity of boxing for fitness by expanding its relationship with 24 Hour Fitness.

An updated version of the Everlast Shadow Box workout is being offered at all 24 Hour Fitness locations.

To help South Florida 24 Hour Fitness centers kick off the upgraded classes, WBC Welterweight World Champion Andre Berto, who is originally from Miami, will lead a class (11:30 a.m.-12:30 p.m.) and then sign autographs and pose for photos (12:30-1:30 p.m.) on Saturday at the 24 Hour Fitness Town & Country location, 8420 Mills Rd., Miami.

The workout is 45 minutes that includes traditional boxing conditioning in a dozen three-minute rounds. Everlast equipment is incorporated into the exercises.

“The Everlast Shadow Box Workout class allows us the opportunity to demonstrate the health benefits of boxing for fitness through an authentic Everlast boxing workout and introduce consumers to quality equipment and apparel that will enhance their overall fitness experience,” Everlast President Adam Geisler said in a statement.

The company is also celebrating the 35th anniversary of Muhammad Ali’s “Rumble in the Jungle” with a vintage line of Ali products.