During the last twenty years, a remarkable new type of service has been developed in the world of sports, which can be described as the indoorisation of outdoor sports. Typical outdoor sports like climbing, skiing, surfing, rowing, and skydiving, which used to be exclusively practiced in a natural environment …

For twenty years, typical outdoor lifestyle sports like rafting, snowboarding and rock climbing, which used to be exclusively practised in natural environments, are being offered in controlled artificial settings. This process can be described as 'the indoorisation of outdoor sports'. With this development, …