THE CARE OF THE HEART-PUMP AND ITS PIPE-LINES The Effect of Work upon the Heart.

Whatever else in this body of ours may be able to take a rest at times, the heart never can.

When it stops, we stop! Naturally, with such a constant strain upon it, we should expect it to have a tendency to give way, or break down, at certain points.

The real wonder is that it breaks down so seldom.

It has great powers of endurance and a wonderful trick of patching up break-downs and adjusting itself to strains.
Every kind of work, of course, done in the body throws more work upon the heart.