Although the rest periods aren't specific, it's always smart to get through the work with a sense of urgency. This trainer is not just about building mass. It's about building quality muscle, losing fat, and increasing overall fitness. Trying to reach all of those goals at once means you need to be on your game through the entire workout. You're in the gym to do work, not to socialize or post to Instagram.
Set the tone of your workout by going through the warm-up exercises with energy and focus. I didn't put them in this trainer for you to just float through. Pay attention to what you're doing and perform them correctly.