How does the Daily Readiness Score work on the Fitbit Versa 4

1. Heart Rate Variability (HRV): HRV measures the variation in time between heartbeats, which is an indicator of the nervous system's balance. A higher HRV generally suggests better recovery and readiness.

2. Recent Sleep: Fitbit considers your recent sleep patterns, including the duration and quality of your sleep over several nights. This helps assess your sleep debt and recovery status.

3. Resting Heart Rate (RHR): A lower RHR typically indicates better recovery and readiness. High RHR can be a sign of stress, poor sleep, or intense physical activity.

The score ranges from 0 to 100, categorizing your readiness into three levels:
- Low Readiness (0-29): Indicates that your body is fatigued and needs rest.
- Moderate Readiness (30-64): Suggests typical recovery levels, meaning you can engage in moderate activities.
- High Readiness (65 or above): Indicates that you are well-recovered and ready for peak performance.

To access the Daily Readiness Score on the Fitbit Versa 4, you need to ensure you have the latest version of the Fitbit app and have worn your device for at least seven days to gather sufficient data. The score is displayed in the Fitbit app and can also be viewed directly on the watch.

Historically, the Daily Readiness Score was exclusive to Fitbit Premium users, but recent updates have made it available to all users with compatible devices, including the Versa 4, without requiring a premium subscription[1][2][9]. However, some features like personalized workout recommendations based on the score might still require a premium subscription[3].