Dr. Gundry breaks down the Apple Watch and whether its data is actually useful. He highlights the "Cardio Fitness" score (also known as VO2 Max), which measures how efficiently your body uses oxygen during exercise.
Why does this number matter? Dr. Gundry explains that higher numbers generally mean better cardiovascular health and a better chance of living a long, active life. He recommends aiming for a score of 40 or higher, though this depends on your age.
However, he notes that while the Apple Watch tracks HRV and resting heart rate, it is "not quite as sensitive" as specialized trackers like the Oura Ring or Whoop Band—but the trends are still valuable.
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