The Side Plank on Knees variation is a good way to work up to the standard Side Plank. Make contact with the ground with your elbow and knee and bridge your hips off the floor, keeping your torso parallel to the wall. Hold for 30 seconds each side.
25 Plank Variations for a Shredded, Stable Core
These 25 plank variations will add some variety to your workouts while you shred your core.