Physical Activity: Can There Be Too Much of a Good Thing?
It is widely acknowledged that physical activity in some way, shape or form is beneficial to a person's health, a concept that has been around for more than two millennia having been first espoused by Hippocrates: "Eating alone will not keep a man well; he must also take exercise"1. Therefore it should come as no surprise that in this issue of Circulation Armstrong and colleagues' present findings from the Million Women's Study, which highlight the beneficial effects on the risk of coronary heart disease, cerebrovascular disease and venous thromboembolism, which regular moderate physical activity confers among active healthy, middle-aged women in the United Kingdom2. Findings from the current have brought some clarity with respect to the questions of how much, how often, and how hard, middle-aged women need to do physical activity to accrue the greatest vascular benefits.
- Received January 5, 2015.
- Accepted January 6, 2015.