Can sauna reduce biological age?

Written by: Bryan Johnson

Published on: May 27, 2025

Can sauna reduce biological age?

Written by: Bryan Johnson

Published on: May 27, 2025

Hi Friend,

There’s a lot of excitement around sauna. I’m going to test it out and see if it works.

To start, I completed some baseline measurements. This will allow me to determine, using data, whether or not sauna has any positive health effects. Measure, always measure.

I'm 47 and my baseline measurements showed that my vascular age is 30.

Sauna is supposed to improve vascular age. I completed these six measurements as a baseline so we'll see if they improve following the sauna protocol. Here’s what I measured and what they mean:

Central Systolic Blood Pressure
This is pressure near the heart. More predictive than a standard cuff.
My score of 103 mmHg puts me in the 20–30 age range.

Central Pulse Pressure
The difference between central systolic and diastolic pressure, a tighter range is better, meaning less pressure stress on the heart.
Mine is 28 mmHg, slightly lower than the average healthy 20-year old male.

Pulse Pressure Amplification
How elastic my arteries are, higher = more arterial elasticity.
My score of 145% reflects a healthy 25-35 year old.

SEVR
Measures how much oxygen my heart gets between beats, higher is better.
My result of 220% is consistent with cardiac perfusion of a 25-35 year old.

Augmentation Pressure
How much extra pressure hits your heart after contraction.
My AP is 2 mmHg, typical of someone in their 20s.

Augmentation Index
Wave reflection and arterial stiffness, lower = better (less stiff arteries).
My score is 8%, suggesting a vascular stiffness of someone in their 20s-30s.

Brachial BP
Traditional blood pressure measurement.
Mind: 115/74 mmHg is a healthy young adult.

Remember to go to bed on time tonight.

Bryan

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