Trends
Every trend Gyroscope tracks
What each number means, what the research says it predicts, what moves it, and how Gyroscope measures it automatically.
Sleep
Sleep DurationWhy seven hours in the middle beats nine broken ones, and why the hours and the score so often disagree.- Sleep TimingWhen you sleep, not just how much. The weekly two-hour shift your body experiences as a flight across time zones.
- Time to First REMHow long until your first dream, and what it quietly says about the evening before.
- Overnight OxygenSleep has a second number. Most nights there is nothing to see, which is exactly why the one night that is different stands out.
- Deep SleepThe stage you never remember and lose first to a late coffee or a glass of wine.
Heart
- Resting Heart RateWhat your heart does when you do nothing, and why it is one of the most predictive numbers your body reports.
- HRVThe gaps between your heartbeats change all night, and how much they change is the fastest readout of stress and recovery your body gives off.
- Blood PressureThe number a doctor checks first and most people check once a year. Thirty seconds at home, once a week, tells you more.
Fitness
Body
Energy BalanceCalories in against your estimated burn, on one chart, and why most deficits are not.- Body CompositionTwo people lose the same five pounds and end up with opposite bodies. The scale shows them the same digit.
- Body WeightThe oldest number in health tracking, and the one almost everyone reads wrong.
Nutrition
- Caffeine TimingWhy a 4pm coffee is still working at midnight, and where a cutoff should sit for you.
- AlcoholWhat one drink does to the night, in a 4,000-night study, charted next to your own heart rate.
- Last Meal TimeDid dinner push your bedtime later? A small number with a long reach.
- Fasting WindowThe gap between last bite and first. Most people's is 9 or 10 hours; a century ago it was 14.
- Macro SplitYour calories have a shape. Two people can eat the same 2,000 and end up in different bodies.
- Nutrient DensityA daily score for what your food was made of, beyond calories. Calories say how much; this says what.