Within a single class, you are able to add in multiple profiles or routes, combining intensity profiles with competitions, etc. In order to combine sessions, simply select a new profile/route by clicking Add Profile/Route button (which will display the current profile name) and picking a new profile.
Note: When using combined profiles, it's important to not end the class until all sections are completed. By clicking the end button, the class will be completed, with summaries emailed to each participant and the bike reservations/bookings reset. Make sure to press this button at the end of class to end the session.