Study on the impact of sport on the well-being of disabled persons. Phase I: description of r's physical handicap / to what extent is r.'s handicap an obstacle for functioning in particular to practice sports / wish to participate in open sports days for handicapped people organized by the Free University of Amsterdam, preferred types of sport / actual leisure activities, including sport / attitude to recreational sport / experience of being handicapped. Phase II: participants at the sports days plus a control group of non-participants interviewed during and after the sports days period / actual practice of sports, intention to practice sports / attitude to participation in sports days , experiences, motives to participate c.q. to stay at home / attitude of people around r. a.o. physician, physiotherapist to r.'s participation in sports days / preference various types of sports, physical ability to practice various types of sport, means of transportation to sports centre / evaluation of sports days Background variables: basic characteristics/ residence/ household characteristics/ education/ organizational membership