How biological age is measured in Paris
fjt reads four signals from everyday life in Paris: steps and movement, sleep duration and regularity, perceived stress, and nutrition including alcohol and caffeine. These map onto established ageing markers and collapse into one score.
No wearable required — your phone is already with you, so measurement starts on day one and updates daily.
Lifestyle factors specific to Paris
Parisians walk plenty, but stress and short sleep stand out; fjt targets sleep regularity first.
Lowering your biological age in 30 days
Anchor your bedtime: keep weekday and weekend within 60 minutes of each other.
Aim for 7,000–8,000 steps, spread across short walks around Paris.
Finish dinner at least three hours before sleep.
Add two resistance sessions a week and five minutes of breathwork daily.