In order to gain full access to Soccer-1, you need to register and login. But you can initially skip the registration process in order to preview Soccer-1.
Without being logged in, you will be able to view all the 3D-models in the Techniques section. Though Soccer-1 has models for both males and females, you will see only the males. When you are logged in, Soccer-1 will show you the male models if you are male, and female models if you are female.
When you log in and provide some basic information, Soccer-1 will develop for you a personalized training regimen. When you are previewing Soccer-1, you will not be able to do a workout.
Note: Not all the techniques have female models. If you are female, and are logged in, you will see the female models when available. Otherwise, you will be shown the male models.