One of the best core exercises

The core is designed to resist forces, primarily to protect the spine, but athletes use the core to transfer force from one end of the body to the other. This exercise is an anti-rotation core exercise, meaning you load one side of your body and you use your core to resist the twisting force. Stay squared up with your shoulders of your hips. It helps strengthen shoulders and chest but is mainly designed to strengthen your core. Start off almost upright and focus on quality.