Physical inactivity is a major independent coronary risk factor.
The risk of heart disease increases by about 1.5 to 2.4 times in the presence of sedentary lifestyles. This increase in risk is similar to that caused by smoking, high blood pressure, or high cholesterol. Like most things that are good for you there is an optimal amount for physical activity. About 2000 calories per week is generally considered to be optimal . Significantly more than this may increase the risk of fatigue or injury and does not confer significantly more by way of added health benefits.