4thgym.nl

4th Gym is a boutique-style kickboxing gym in Amsterdam. It welcomes beginners and experienced people in a safe, friendly space. They offer 1-on-1 personal training and group kickboxing classes to improve fitness and technique. Training focuses on fun and conditioning. Members can book sessions via the 4th GYM app. The gym also offers programs for kids to safely try kickboxing. The site includes the location and how to sign up for classes.