Ultrahuman Ring Air Aster Black (Size 13) Track Sleep, Movement , Recovery Smart Ring  (13, Aster Black)

Ultrahuman Ring AIR - World’s lightest Sleep-Tracking Wearable, HRV & Temp Monitoring, Track Sleep, Movement & Recovery, Water Resistant, 6 Days Battery Life with Lifetime Free Subscription (Size 5) Not sure of your ring Size: Choose the right size from the Ultrahuman Ring AIR sizing kit available on Amazon or use the Ultrahuman Ring sizer app on IOS Sleep Index is derived to help you understand the various sleep stages such as Deep sleep, REM sleep, Light sleep and being Awake. During different stages of sleep, different metabolic processes of the body occur for growth, repair, restoration, and maintenance. Movement Index is designed to help you move across the day enabling better metabolism and cardiovascular functioning. Track your steps, calories, metabolic equivalents (METs) and more. Recovery Score provides insights into various signals your body sends throughout the day, enabling a deeper comprehension of its needs. It is derived from a blend of key metrics, including Heart Rate Variability (HRV), Heart Rate, and Skin Temperature, interpreting the signals your body sends and enabling you to monitor your overall well-being. Workout tracking: The Ultrahuman Ring AIR has a dedicated "Workout Mode" that tracks various activities, giving you deeper insight into your overall workout metrics. By tracking heart rate during workouts, users can gain insights into their cardiovascular response, track intensity levels, and make informed decisions to improve their fitness outcomes.