To determine the prevalence, incidence, risk factors and prognostic factors for climbing related injuries of the upper extremity among sport climbers in the Netherlands.Primary research questions1. What is the prevalence (year and point prevalence) of climbing related injuries in the upper extremity?2. What is the incidence of climbing related injuries in the upper extremity?3. What kinds of injuries do occur?4. What are the risk factors for getting injured?5. Is there a difference between the different climbing injuries (bouldering, top rope, and leading)?6. What is the course of climbing injuries?7. Which factors influence the course of these injuries?8. How do these injuries affect daily activity and work?9. What is the medical consumption among those with climbing injuries? The last two decades sport climbing is becoming an increasingly popular sport. The first indoor climbing wall in the Netherlands is opened in 1992. Currently there are 26 big climbing walls and 44 smaller indoor or outdoor climbing walls. The number of school gyms with a climbing wall is also increasing. Little research is done on climbing injuries and mostly done among competition climbers. With the safety of a climbing wall traumatic injuries are rare but overuse injuries occur frequently. About the prevalence of injuries among the majority of sport climbers, the recreational sport climbers, little is known. The goal of this research is to determine the prevalence and incidence of overuse and chronic sport climbing injuries and identify risk factors related to development or chronicity of these injuries. This information is crucial to doctors and climbers. Also, if risk factors can be determined a prevention program can be developed.Main questions:What is the prevalence and incidence of sport climbing related injuries of the upper extremity?What are the risk factors for developing a sport climbing injury?What is the course of sport climbing injuries by what factors is the course influenced, and what is the impact of climbing injuries on daily live?Method:Prospective cohort research. The follow-up is one year.Population: Climbers of 12 years and older with good understanding of the Dutch language will be asked to cooperate. Study size:The baseline inclusion will consist of 410 climbers. 25% will be starting climbers who will be approached during courses.