Abstract:
Regular physical activity is widely acknowledged as beneficial for cardiovascular health, with frequent exercise linked to reduced cardiovascular mortality and risk of developing cardiovascular disease. Physically active people tend to have lower blood pressure, higher insulin sensitivity, and a more favorable plasma lipoprotein profile. Studies using animal models have shown that repeated physical activity can suppress atherogenesis and increase the availability of vasodilatory mediators like nitric oxide. Exercise also has positive effects on the heart, increasing cardiac output and blood pressure acutely, but leading to lower resting heart rate and cardiac hypertrophy in those adapted to exercise. These cardiac and vascular changes have been linked to changes in tissue metabolism and signaling, but the underlying mechanisms are not fully understood. While moderate exercise is consistently associated with reduced cardiovascular disease risk, there is evidence to suggest that excessively high levels of exercise (such as marathon running) could have negative effects on cardiovascular health. However, the specific relationship between the amount and duration of exercise and the reduction in cardiovascular disease risk and mortality is still unclear. Further research is necessary to identify the mechanisms by which exercise imparts cardiovascular benefits, to develop more effective exercise regimens, to test the interaction of exercise with diet, and to develop pharmacological interventions for those who are unable or unwilling to exercise.
