Injury Prevention in Indoor and Field Football1. Introduction Injuries that occur during sporting activities are a subject regularly studied by scientists and, in this regard, indoor or field football is no exception. The incidence of injuries in indoor football is 7.1 injuries per 1,000 hours of sport. Most injuries are caused by physical contact with the opponent (punching and kicking). These injuries typically affect the lower extremities (70%), such as the lower leg (11%), ankle (10%), and groin (8%). The risk of muscle or tendon injury is 27%, which is considerably lower than that of grass football (59%) (Jung & Dvoral, 2010). The incidence of injuries in field football is 19.7 injuries per 1,000 hours of sport (Vorstenbosch et al. , 2008). Most injuries to football players on the field have been caused by falls, including sprains, steps and physical contact. 80% of these injuries concern the lower limbs. The most common injury locations are: knee (20%), ankle (17%) and hamstring (12%). In addition to knee and ankle injuries, professional football players suffer from many muscle injuries in the hamstrings and thighs. 1.1 Causes A number of risk factors have been discovered in the literature for the development of injuries. Gender (m/f) and position on the field do not influence the type and location of injuries. Growth spurts and obesity play a negative role in injuries. During the growth spurt, players are very susceptible to injury. Training and competitions also have an influence. Strains and contractures (permanent shortening or contraction of tissues) are more common during indoor training; and the number of muscle tears and fractures is more common during indoor competitions (Broman et al., 2013). This corresponds to the b...... middle of paper ......indhoven will map the injuries that occur in players who play both indoors and on the field. To this end, the incidence, type and location of injuries are permanently recorded in a database and risk factors such as height and weight are taken into account. This recording of injuries will be linked to research on the load/capacity of the players by means of questionnaires (EMI and EMH) and a logbook. Additionally, soccer-specific soccer tests (ISRT, close team games) will be administered. In the future, player load/capacity will be monitored through a tracking system. Finally, an exercise program can be developed to prevent injuries. An application can be developed and marketed. Additionally, the research results can be published in a scientific journal..