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The impact of (in)sufficient levels of physical activity (PA) have been well described and without argument, the promotion of PA—defined as moderate to vigorous physical activities, including sports and exercise—is now a cornerstone of contemporary public health.1 In our global effort to decrease the individual and public burden of chronic and lifestyle-related diseases, PA is being promoted as a medicine or drug, with the implication that it is a treatment and a preventive measure. Although the pharmacological benefits of PA have been well described,2 the analogy between PA as medicine is not drawn in full, because any substance that is capable of producing a therapeutic effect can also produce unwanted or adverse effects.3 The potential for adverse effects of PA, and the need to mitigate them, are mostly ignored in PA research and PA interventions alike.
An adverse drug reaction is defined by the WHO as “a response to a drug that is noxious and unintended and occurs at doses normally used in man for the prophylaxis, diagnosis or therapy of disease, or for modification of physiological function.”3 An injury resulting from the recommended daily dose of 30 min of moderate to vigorous PA certainly fits this definition. However, truth be …
Contributors EV and CFF contributed equally to the conception of the manuscript. CB contributed to the writing of the manuscript and provided critical or other input during various paper drafts.
Competing interests CFF is funded by a National Health and Medical Research Council Principal Research Fellowship. 2Australian Centre for Research into Injury in Sport and its Prevention is one of the International Research Centres for Prevention of Injury and Protection of Athlete Health supported by the International Olympic Committee.
Provenance and peer review Not commissioned; externally peer reviewed.