Eli5 the relationship between heart rate and fitness level/stamina

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I (38f) was hiking with my partner (49m). I was feeling fine and would have liked to go faster but he was huffing and puffing and needed lots of breaks. His heart rate was around 130, while mine was up around 160. I have always heard that having a slower heart rate is a sign of better cardio fitness, but I work out more and have much better stamina during exercise than he does. What’s that about?

(Edited because I forgot how old I am)

In: 5

4 Answers

Anonymous 0 Comments

It’s hard to say without more details, but if he was huffing and puffing he might have been limited by his lungs directly rather than his overall cardiovascular fitness.

Also, he’s 10 years older than you, and the older you get the lower your exercising heart rate gets. It’s not a 30 point difference for 10 years, but it’s likely a contributor.

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