The popularity of indoor climbing has increased in recent years. Although high-quality data are not available, market research suggests that 1.5 million people now climb indoors in the United Kingdom every year, with this number increasing 15 to 20% each year (unpublished report commissioned by the Association of British Climbing Walls, 2019). This is in parallel with the rising public profile of climbing epitomized by the Oscar-winning documentary “Free Solo” and the inclusion of climbing in the 2020 Summer Olympic Games.