Determinants for practising sports. Actual and desired practising of sports / leisure and sports / knowledge about sports / sports accommodations / sports clubs / sporting in non-sports organizations / attitudes towards sports / reasons for practising or non-practising sport / organised sports activities in environment / information and propaganda about sports / sports activities in the past at school and leisure time / stimuli and motivations for practising sports. Background variables: basic characteristics/ residence/ housing situation/ household characteristics/ occupation/employment/ income/capital assets/ education