Become part of the big WORLD FITNESS DAY community and join us in celebrating the fitness lifestyle. Up to 35,000 fitness enthusiasts from all over the world flock to the Main metropolis of Frankfurt, transforming the Commerzbank Arena grounds into a huge fitness adventure park. Immerse yourself and discover our 9 adventure worlds on more than 35,000 m². Discover the latest trends & hippest brands, meet your idols and social media stars. Train in the largest gym in the world. Experience fitness in a new dimension.