Here are some interesting facts about the human heart. . . The average adult heart beats 72 times a minute; 100,000 times a day; 3,600,000 times a year; and 2. 5 billion times during a lifetime. Every day, the heart creates enough energy to drive a truck 20 miles. In a lifetime, that is equivalent to driving to the moon and back. Also, during an average lifetime, the heart will pump nearly 1. 5 million gallons of blood—enough to fill 200 train tank cars. The heart does the most physical work of any muscle during a lifetime. The power output of the heart ranges from 1-5 watts. While the quadriceps can produce 100 watts for a few minutes, an output of one watt for 80 years is equal to 2. 5 gigajoules. To put it mildly, the human heart is an amazing organ, and we've dedicated this special section of cufflinks to the heart. Whether love is on your mind or simply the amazing output of the organ itself, our Heart Cufflinks make the perfect gift for all those "heart conscious" people out there. Let that someone special know that they are in your heart forever.