Looking to amp up your planks? This side star plank is great way to target your upper body and your core at the same time! It will really help you to gain body control. Get into side forearm plank position with top hand resting on waist. source
In a controlled movement, raise top leg up as high as you can while staying balanced, and simultaneously extend top arm straight up from shoulder toward ceiling. Return top leg and arm to start position and repeat. Click on link for steps Advertisement