Side Elbow Plank With Pulse Start in a side elbow plank on your right side. Lower your hips slightly and then lift your pelvis up, feeling the right side of your body engage, especially your abs. This completes one rep. Lower your hips, and raise your pelvis; keep pulsing for 20 reps, then switch sides. Adding the pulse to the side plank works your abs and arms even more. Image Source: POPSUGAR Photography / Kyle Hartman