Performing the side plank correctly will effectively stimulate the obliques and many other synergistic core muscles. Pay close attention to the proper body position and head posture to ensure your success.
Each set listed withing a personalized training routine will list a time period which should be done for both sides. Meaning holding the position on the left and right arms to count as one set.
Do not perform side planks if you have an injury history including, but not limited to lower back, core or shoulders.