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Matthijs's avatar

N=1 here, but it's something I’ve noticed in myself. Since February, I've been training (cycling) in a more structured way for the first time in years, with a much greater focus on zone 2 work than before. I've found that on the days following these endurance sessions, my HRV tends to be higher and my resting heart rate significantly lower.

In recent years, I would just do whatever felt right in the moment, often leaving me tired and not fully recovered. As a result, I wasn’t doing any real endurance training, and my average HRV was lower while my resting heart rate stayed higher.

It's somehow comforting and encouraging to see that's backed by science as well.

What I'm really trying to say is: I feel fitter, less tired and more ready than ever and the numbers in your app show it when doing my morning reading.

Thanks for the good stuff, Marco!

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Marco Altini's avatar

thank you Matthijs and well done!

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Will Gillingham's avatar

Fascinating stuff. I have noticed overall lower levels of anxiety and stress response in myself after consistent weeks of exercise at a lower heart rate/effort. Good to know there’s science to support it.

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Francesco Cuzzolin's avatar

Thanks, Marco, for your article and for the great work you're doing to clarify HRV. Low-intensity exercise, which lowers cortisol levels, can offer several health benefits, such as better stress management, enhanced immune function, improved cognitive performance, and overall well-being. These benefits can be both immediate and long-term, making low-intensity exercise a valuable addition to a balanced lifestyle and recovery strategy. I believe many athletes and coaches are underestimating its importance.

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Leonardo Riccardi's avatar

Very interesting, thanks!

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Robb Seaton's avatar

Fascinating, Marco. I dug into the Seiler study, participants in the <VT1 conditions trained at 68% MaxHR / 61% VO2Max. Interesting to note that this is a level of intensity that, according to the first study you mention, does increase mean cortisol.

I'm going to experiment with taking HRV pre/post at different "easy" intensities and see if I can determine a personal "Easy Zone." Thanks for the inspiration!

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Dominic Schultz's avatar

Love this! Talk to my patients frequently about the importance of variability and spending more time on the low need then they think.

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Giuseppe's avatar

Wow! It’s the reason why on the test day I prefer to take a 1-hour walk (even just running errands) rather than staying on the couch and feeling the benefits the next day!

I don’t know if this applies to me that I have a high training volume or if it can be useful for everyone.

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