Profiles and sub-profiles represent people rather than the general user account. If a profile (person) is registered for a team or part of a group, the contact info for that profile will receive messages related to the team or group such as messages from a coach. You will have a profile (My Profile) as the account owner, and if you've used your account to register someone else (child, spouse) they will have a sub-profile under Household.

1. Click your Profile drop-down list and then click Household
2. Select the child's profile (left hand side)
3. In the Contact Information Section, click Add Email Address

NOTE: It's also recommended to add additional emails to can under 'My Profile' section.

Pro-Tip: Adding a second email address to a profile will allow a second person to receive all messages relating to the profile without sharing account access.