You can do various group lessons at the Oostelijk Zwembad, like Aquajogging, Aquavaria, Bootcamp and Aquaslim.
Aquajogging, Aquavaria and Bootcamp are intensive lessons to train various muscles. Aquajogging and Aquavaria are lessons in deep water and Bootcamp in shallow water.
Aquaslim is a special lesson for those who want to loose weight. This is a course of 8 weeks and provide also advise about healthy food. During the course you can go lane swimming for free.