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> There are some obvious signs that Johnson is at least healthier than most 45-year-olds. The dude is way beyond ripped. His body fat hovers between 5% and 6%,

> There are some obvious signs that Johnson is at least healthier than most 45-year-olds. The dude is way beyond ripped. His body fat hovers between 5% and 6%, which leaves his muscles and veins on full display. But it’s what has happened inside his body that most excites his doctors. They say his tests show that he’s reduced his overall biological age by at least five years. Their results suggest he has the heart of a 37-year-old, the skin of a 28-year-old and the lung capacity and fitness of an 18-year-old. “All of the markers we are tracking have been improving remarkably,” says Toll.

tablespoon 4y ago
> ...he’s reduced his overall biological age by... Without even looking, I'm almost certain the way they technically define "biological age" is misleading, and it resembles what most people think of when they hear "age" like an apple resembles an orange.
- generalizations 4y ago
  > I'm almost certain the way they technically define "biological age" is misleading I'd be curious how you came to that conclusion - considering that there's currently no known way to objectively measure biological age. Best thing that any researcher can do right now is just measure everything, and that's what they're doing.
  - tablespoon 4y ago
    >> I'm almost certain the way they technically define "biological age" is misleading > I'd be curious how you came to that conclusion - considering that there's currently no known way to objectively measure biological age. Best thing that any researcher can do right now is just measure everything, and that's what they're doing. I came to that conclusion because, if they have a definition, they're almost certainly measuring things they can easily measure and perhaps influence, which aren't really the things people speak about when they talk about age. I don't care how fit this guy is, he's not living to 140 by doing the stuff he's doing.
    - generalizations 4y ago
      You can see for yourself the things that they're measuring: https://archive.is/TADr1#bryan-johnsons-blueprint https://archive.is/TADr1#bryan-johnsons-blueprint
- notahacker 4y ago
  Certainly the "lung capacity and fitness of an 18 year old" that's the headline feature is a VO2Max score which is extremely variable, responsive to training and doesn't decline that steeply. Looking at his posted "18 year old" score in comparison with reference charts, it's a bit above average for someone in their mid twenties (who probably doesn't work out much), well into the "very good" range for someone about to turn 40, and yes it's excellent for someone who's 47... but it's an upper percentile score for someone in an upper percentile of fitness obsession, not a miraculous teenage body.
tgv 4y ago
> All of the markers we are tracking You know what they say about measures: they stop being useful when you try to aim for them.

tablespoon 4y ago

> ...he’s reduced his overall biological age by... Without even looking, I'm almost certain the way they technically define "biological age" is misleading, and it resembles what most people think of when they hear "age" like an apple resembles an orange.

generalizations 4y ago
> I'm almost certain the way they technically define "biological age" is misleading I'd be curious how you came to that conclusion - considering that there's currently no known way to objectively measure biological age. Best thing that any researcher can do right now is just measure everything, and that's what they're doing.
- tablespoon 4y ago
  >> I'm almost certain the way they technically define "biological age" is misleading > I'd be curious how you came to that conclusion - considering that there's currently no known way to objectively measure biological age. Best thing that any researcher can do right now is just measure everything, and that's what they're doing. I came to that conclusion because, if they have a definition, they're almost certainly measuring things they can easily measure and perhaps influence, which aren't really the things people speak about when they talk about age. I don't care how fit this guy is, he's not living to 140 by doing the stuff he's doing.
  - generalizations 4y ago
    You can see for yourself the things that they're measuring: https://archive.is/TADr1#bryan-johnsons-blueprint https://archive.is/TADr1#bryan-johnsons-blueprint
notahacker 4y ago
Certainly the "lung capacity and fitness of an 18 year old" that's the headline feature is a VO2Max score which is extremely variable, responsive to training and doesn't decline that steeply. Looking at his posted "18 year old" score in comparison with reference charts, it's a bit above average for someone in their mid twenties (who probably doesn't work out much), well into the "very good" range for someone about to turn 40, and yes it's excellent for someone who's 47... but it's an upper percentile score for someone in an upper percentile of fitness obsession, not a miraculous teenage body.

tgv 4y ago

> All of the markers we are tracking You know what they say about measures: they stop being useful when you try to aim for them.