3. Heart-Rate Variability (DAILY)
WHAT IT MEASURES: The variation in time between heartbeats.
WHY IT’S KEY: It’s a good measure of stress. Typically, those who are relaxed and fit have a high HRV, while those who are stressed or depressed have a low one. (Meditation and yoga can help.) It’s a feature on some trackers and heart-rate monitors.
AIM FOR: It’s personal. “It’s best not to compare your HRV with others’,” Spar says. Instead, follow your HRV and track with your daily activities to learn what helps it. An elite athlete’s is around 60 milliseconds; anything above 50 is considered good.
For access to exclusive gear videos, celebrity interviews, and more, subscribe on YouTube!Back to top