Think about this – on average, a person’s heart will beat about 100,000 times a day. And, at that rate, around 36,500,000 times a year, for a whopping 3.0+ billion heartbeats in an 85 year life span. I found that number hard to get my head around. I mean, how could a heart beat over 3 billion times in a life? – It’s such a huge number! Isn’t it? Well, the math is the math, and as big as that number might appear, imagine if there was a cap – a maximum number of beats your heart could actually put out. If something like that were true, what would that mean for endurance athletes?