Side Deltoid / Lateral Deltoid Exercises
The side deltoids (also known as the middle deltoids) or, as their scientific designation declares, the lateral deltoids, are located as one would guess, on the side of the shoulder when standing relaxed. The lateral deltoids are one of three muscle locations within the overall deltoid muscle.
Due to their proximity to the other deltoid muscles, side deltoid exercises are used in nearly all shoulder exercises, even if to a small degree.