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Czech kettlebell training brand Železná Koule has opened its largest location yet at Danube House in Prague’s Karlín district.
The new 600-square-metre gym expands the brand’s presence in Prague and comes ahead of the next edition of its flagship Amazing 12 fitness programme.
Železná Koule has built a community around kettlebell training and coached workouts rather than the traditional self-service gym model. The company says more than 20,000 people have trained through its programmes since its launch.
At its Karlín location, members train under the guidance of coaches in small groups. The approach is designed to provide more personal instruction and a structured training environment, rather than simply giving members access to gym equipment.
The new location is also the latest venue for the company’s Amazing 12 programme, a 12-week fitness and body transformation course that combines regular training with nutrition guidance and ongoing support.
What is the Amazing 12 programme?
The programme is aimed at both people who are new to structured strength training and more experienced gym-goers looking for a more organised approach to their workouts.
Although the programme itself lasts 12 weeks, participants first complete a preparation week, making 13 weeks in total. During the programme, they take part in 64 training sessions, with one-hour workouts held every weekday under the supervision of a coach.
Groups are limited to a maximum of five participants, allowing coaches to work closely with each person throughout the programme.
The programme is designed to provide a structured routine covering exercise, nutrition and recovery, with progress tracked throughout the 12 weeks.
The next Amazing 12 programme starts on August 31, 2026, with places available at the new Karlín location as well as Železná Koule gyms in Smíchov and Strašnice.
The Karlín opening is part of the continued expansion of a Czech fitness brand that has developed a following around kettlebell-based training and small-group coaching. For people unfamiliar with the name, Železná Koule roughly translates from Czech as “iron ball,” referring to the kettlebell at the centre of its training approach.
More information about the Amazing 12 programme, including registration, is available at amazing12.cz.
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