Body · free course
Measuring Your Body
Some of the most useful health numbers don't need a lab: a blood pressure cuff, a tape measure, a scale and a wrist sensor can track them at home. This track covers which home measurements are actually linked to outcomes, how to take them so the number means something, how accurate consumer devices really are, and how to build a routine that informs decisions without feeding anxiety.
10 lessons · about 70 minutes
- 01Home numbers worth measuringWhich at-home measurements are linked to real outcomes, and why a trend beats any single reading.6 min
- 02Blood pressure: the number that matters mostWhy it leads the list, how to measure it so the number is real, and the home thresholds that should prompt action.8 min
- 03Resting heart rate: your easiest trend lineWhat it reflects, what moves it, how wearables measure it, and when a heart alert means see someone.7 min
- 04Heart rate variability: a personal numberWhat HRV measures, why comparing yours with anyone else's is meaningless, and how to use your own baseline.6 min
- 05Weight, waist & body compositionWhat the scale can and can't tell you, why your waist beats BMI, and how far to trust body-fat numbers.8 min
- 06Fitness estimates: VO₂ max from your wristCardiorespiratory fitness strongly predicts lifespan, but a watch's estimate can be far off. How to get a number you can use.7 min
- 07Sleep tracking: what to trustWearables are good at when and how long you sleep and much shakier on stages. Plus: when tracking backfires.7 min
- 08Temperature, blood oxygen & stepsThermometers for fever and cycle tracking, the real limits of SpO₂, and what step counts are actually linked to.8 min
- 09Choosing a device worth owningThe specs that matter, the claims to distrust, what happens to your data, and when not to buy at all.7 min
- 10Build your measurement routineHow often to measure each thing, which changes should send you to a doctor, and how to keep tracking from turning into worry.6 min