Sets are a great way to increase the volume of an exercise without sacrificing reps or weight. A set is the given amount of times you perform repetitions.
For example 3 sets of 5 repetitions means you will perform 15 total reps divided into 3 different sets.
Adding additional sets to an exercise will allow you to focus on a manageable weight if you are unable to add additional reps or weight to the exercise.
Technique #1 Additional Sets
Instead of doing 3 sets of 5 reps perform 4 sets of 5 reps.
Bench Press 100lbs x 3 x 5
Change to Bench Press 100lbs x 4 x 5
Technique #2 Split Sets
Bench Press 100bs x 3 x 5
And add Bench Press 65lbs x 3 x 10
Take note that if you are adding sets the intensity principal still applies so your weight must remain 65% or more of your training max.
See previous post on intensity: Click Here
Dedicate & Succeed,