This activity tracker gives you several functions to keep track of different key metrics during the workout. It has a built-in sleep tracker so you can measure your sleep quality.
From Amazon
Xiaomi Mi Band 5 Black Health & Fitness Tracker, 14 Days Battery, Heart Rate Monitor, Sleep Tracker, Activity Tracker, 5ATM 50m water resistance and swimming tracking, Pedometer, Sleep counter
Comet
Xiaomi Mi Smart Band 5