The project participants are included consecutively in the intervention group or the control group for two years. A power calculation shows the study can, with a random sampling size of 100 patients, 50 in each group, show a difference of 2,7 seconds in FTSST(Stand up - sit down five times). The strength is set to 80 %. The calculation is based on a standard deviation of 4,8 for FTSST and a 5 % to-sided significance level. If a dropout rate of 20 % is allowed for, it will mean that 128 persons must be included.