The heart of a person who is in good physical shape can do the same work with fewer heartbeats. Many people who exercise regularly will have values in the 60s. Blood pressure tends to be lower in people who exercise. Thus, the heart doesn't have to pump as hard. Lower blood pressure helps prevent heart attacks in later life.
Exercise tends to build extra blood vessels in the heart.
This lets more blood flow to the heart. These high blood fat levels can lead to early aging of blood vessels. Exercise and good blood sugar control are the best ways to reduce blood triglyceride levels. One study showed that triglyceride levels could be reduced greatly after only four sessions of running 40 minutes a day. The number of insulin receptors, the places where insulin attaches to cell membranes to allow sugar to pass into the cell, actually increases as a result of regular exercise.