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Advanced fitness insights

Advanced fitness insights

If you want more advanced fitness insights, three metrics you should:

  • HRV is a metric measuring the fluctuations of time between heartbeats. It’s often used as a measure of how well you’ve recovered from a workout or to estimate stress levels.
  • SpO2 is often used interchangeably with pulse oximetry. The gist is that it measures how oxygenated your blood is. Companies are still figuring out how to best utilize this metric, but you frequently see it pop up in sleep and recovery tracking.
  • VO2 Max is a metric that measures the maximum amount of oxygen your body can use during intense exercise.

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If you’re looking to leave your phone at home, you might be better off with a smartwatch that has decent health features.

  • All fitness trackers have a combination of accelerometers and gyroscopes to detect motion. Some will add altimeters and barometers to measure elevation or how many stairs you’ve climbed in a day.
  • Nearly all modern trackers have a photoplethysmography (PPG) sensor - green LEDs that sh...

  • When browsing your options, don’t forget to check the size and thickness of the watch, as well as the materials it’s made from. If your fitness tracker isn’t comfortable, you’re not going to wear it.
  • Comfort is especially important if sleep tracking is a pr...

Why do you want a fitness tracker to begin with? To lose weight? Train for a marathon? Improve your sleeping habits? Fitness trackers are a motivational tool, but they can’t help if you’re unclear about your goals.

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