Assistance exercises are movements the help you get better at structural exercises. The main structural exercises are squat, deadlift, lunge, push, pull, and twist. For example: If you do an upper body workout that includes chest presses, rows, shoulder press and chin-up, a set of lateral raises may work well with this program. The lateral raises would strengthen your shoulders and help you perform the structural back row exercise better.
Definition and examples of different assistance exercises.