The Account - Profile page contains your basic personal details and account settings, such as password, body weight and height, time zone, etc. 

Some key items to focus on here:
  • Weight: Accurate body weight is important for ongoing data tracking, such as power to weight ratio. Also see Body Metrics History
  • Time Zone: Sets the default time zone, which is neccesary for rides to show up correctly on your calendar
  • Units
  • Birthdate
  • Language/Locale