Objectives-To compare two programmes for reducing the levels of risk indicators of heart diseases among professional drivers. The programmes were focused on changes of lifestyle. The aim of the programmes was to initiate and motivate a process of change within the driver, which in the long term should lead to permanent and sound health habits. One programme was based on health profile assessment and the other was a health examination. Methods-Altogether, 102 subjects were investigated (51 allocated to an intervention group and 51 to a reference group). The programme in the intervention group (health profile assessment) was based on revelatory communication, adjusted to the driver and contained individual and group activities. The reference group went through a health examination. In both groups blood pressure, serum lipid concentrations, body mass index, and estimated maximal oxygen uptake were measured and the lifestyle habits were surveyed by questionnaires at the start and at follow ups of 6 and 18 months. Results-The results showed that in the intervention group the maximal oxygen uptake increased, as did exercise habits and the intention to practice good dietary habits. Variable working hours was the most common obstacle to change a health habit. In the reference group the maximal oxygen uptake increased and the concentration of serum total cholesterol and the number of people who perceived stress and loneliness decreased. Conclusions-Both the health profile assessment and the health examination had an eVect on the levels of some risk indicators of heart diseases. Both programmes turned out to be useful because of high participation during the entire period and a generally positive attitude among the subjects. (Occup Environ Med 1998;55:554-561) Keywords: intervention study; lifestyle; occupation health service Several investigations have indicated that cardiovascular diseases aVect professional drivers more often than many other occupational groups. This has been independent of research methods, techniques of measurements, and material for comparison. [1][2][3][4][5][6][7] Studies have also shown that drivers are exposed to several possible risk indicators of cardiovascular diseases such as physiological risk indicators (increased blood pressure and total cholesterol concentration) and indicators related to work environment and the lifestyle.Risk indicators related to the work environment were evaluated among 440 male professional drivers in Sweden, 8 and showed that significantly more drivers than referents had a work situation characterised by high demands, low decision latitude, low social support at work, and shift work. It also showed that significantly more drivers than referents were sedentary in their leisure time, smokers, overweight, and consumed a significantly higher proportion of milk fat per day. Low physical activity in leisure time, 2 9 10 high incidence of smokers, [8][9][10] and overweight [8][9][10][11] were also found among professional drivers in other studies. The excess pr...