The dimensions of health promotion applied to physical activity. 
Health promotion is a complementary array of educational and environmental strategies applied in various settings and targeted at selected populations.  The few successful and well-described physical activity projects have applied multiple strategies in multiple settings to specific target groups.  There is clear and persuasive evidence that regular physical activity improves health.  Over the past 20-25 years participation in leisure-time physical activity has increased in Canada, Finland, the USA, and the German Democratic Republic.  Unfortunately, more than half the population in each of these four countries remains inactive during leisure time, and total physical activity probably has decreased because of declining activity on the job and for transportation.  National physical activity promotion programs need to include both educational and environmental strategies.  Regular surveys of physical activity patterns and continued research into the most effective methods to promote regular physical activity are needed.