Phase Three's coming to a close. Finish it strong. Push hard and max out on every 30-second sprint. Your heart might be beating rapidly, you might feel out of breath, but you can keep going.
Think about how you felt when you first started week one, and how much stronger you are now. Think about how your lifts have gone up, how you've gained confidence in performing cardio, and how the confidence you've gained in the gym has translated into other parts of your life. What's a better motivator than positive change?