As gessermama said, they expect you to stop between tracks to change weights and set up for the next track. Keep it brief and precise, and you'll stay in the 55 minutes time frame.
Depending on where you are it can take 3 weeks to 3 months to get your assessment back. Good Luck!
Happy Pumping!
Always Be the Best You Can, Never Ever, Ever Give Up! Dare to be Different!