If our heart muscles never “get tired” even if they’re working hard, why aren’t the rest of our muscles the same way?

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I would imagine it would be a pretty good thing if we never tired out, even if it meant we weren’t quite as strong, or had to compromise elsewhere.

So why aren’t ALL our muscles the same way as the ones in our heart, where they’ll just keep working without aches, power loss or even all-out cramps and failure when they’re working hard?

Also, I do understand that even heart muscles can break down, e.g. in a heart attack, but we never get “heart cramps” even if we exercise all our other muscles to their limits and our heart is still working normally.

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Anonymous 0 Comments

What is the function of chordae tendinae? They’re the tendons which are inside the heart right?

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