What is core strength? I discovered how important it is the first time I tried to surf in Lima, Peru. I came to a quick realization and it was this: In order to have the ability to surf you must have a strong core. More about that story later.
First off, you need to understand what your core is. The core refers to the trunk of your body. The abdomen, obliques, glutes, mid and lower back. Many of these muscles are mostly unseen. They are a hidden muscle group.