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Mortality in joggers: population based study of 4658 men

Since 1970 jogging has become an increasingly popular form of exercise, but the public's concern over its harmful effects has been raised following reports of deaths during jogging. During the past two or three decades the number of joggers and jogging races has increased further, prompting an interest in mortality of joggers.

The Copenhagen city heart study is a prospective population study of cardiovascular disease in 19 698 men and women aged 20 years and over randomly selected from the population of Copenhagen.1 Overall, 4658 men (response rate 72%) aged 20–79 years with no prior myocardial infarction attended two examinations—one in 1976–8 and the other in 1981-3. Jogging status was ascertained by asking the participants whether they were joggers. The cohort was followed until 30 …