Physical activity among a sample of Iranians aged over 60 years: an application of the transtheoretical model.

Background: Physical inactivity is one of the leading causes of major chronic disease, which contributes substantially to the global burden of disease, death and disability. This study examined physical activity in a randomly selected sample of elderly people in Tehran, Iran.

Methods: A random sample of 400 elderly people aged 60 years and over was selected through multistage sampling.