I am sure you have probably heard of this: The fitter you are, the slower your heart rate. Simply because these people's heart can pump more blood every beat.

Five times Tour de France champion Miguel Indurain has a resting heart rate of 29 bpm! At full steam, his heart can pump 7 litres of blood around the body every minute, compared to an average person's 3 to 4 litres.

Beware, if you hardly exercise and your heart rate is below 60 bpm, you could be in a medical condition called Bradycardia.

The key to a stonger heart is consistent aerobic exercise. So get out of your couch and start exercise now!