View this video explaining the power circuit.

The Power Circuit Workout Routine

The goal of the Power Circuit Training Workout is to increase endurance and strength in one workout. Instead of repetition based, these workouts are time-based, with more focus on endurance and calorie expenditure.
How to Perform
Perform each exercise at YOUR OWN PACE for the time alloted. Repeat the circuit if instructed to. Try your best to complete the circuit without any rest!
It may be difficult at first to determine your pace. However, over time you will learn your pace, as you will see it drastically improve. These are excellent exercises to do for weight loss.