Various body and sleep metrics can be logged manually from the calendar page. Click the  icon and select Record body and sleep metrics. To log additional details, click the expand icon on the bottom of the overlay to expand the body metrics page. 

To set up these metrics to be synced automatically through your smart watch, scale, or other device, click on your name in the upper right > Profile > Connections. Body metrics and sleep data can be synced automatically through Garmin Wellness, Under armor, or Fitbit accounts.