A superset, also known as a circuit, is a combination of two or more exercises for which you complete the set for the first exercise, and then move immediately on to the sets for the next exercise without taking a break in between.
To perform a superset, first you must complete all of the reps for set 1 of exercise #1. Then, without resting, move immediately on to all of the reps for set 1 of exercise #2. Keep going until you have finished set 1 for all of the exercises within the superset (this will vary depending on the number of exercises that are in your superset).
When all of the reps for set 1 are completed, rest for the amount of time specified in your workout plan. After resting, begin set 2 of all the exercises in the superset. Continue until you have completed all the sets for each exercise in the superset.
To learn how to superset exercises in the Workout Plan Creator, click here.