In order to edit an athlete profile, that athlete must have already been claimed by you. For instructions on claiming an athlete, follow this link:
https://support.milesplit.com/en/a/claiming-an-athlete

You have the ability to edit basic information on your athlete profile (or your child's profile). After accessing your profile page, click on the "Edit Athlete" button placed under the athlete name and basic info.

This will allow you to edit information ranging from the name you wish displayed, to birthday, to listing awards and honors.

You also have the ability to add a profile picture to the athlete profile. Simply browse your computer for the image you would like, and click the "upload" button.

After all changes have been made. Click the "Save Changes" button at the bottom of the screen.