Cardiovascular Imperative

Heart disease is the leading cause of death in the United States. In 2010, an estimated 785,000 Americans had a new coronary attack, and about 470,000 had a recurrent attack. About every 25 seconds, an American will have a coronary event, and about one every minute will die from one. An estimated nine out of…

Exercise physiology of the heart

Cardiac Functionality An article in issue 20 of the NSCA TSAC Report focuses on firefighters and their susceptibility to exercise-induced cardiac fatigue or a loss in cardiac function. For a heart to function properly during exercise it must pump out sufficient amounts of blood with each beat, known as the heart’s stroke volume (SV). The…