Generally speaking, the core starts at the lower rib cage and extends to the buttocks. Core muscles in the abdomen include the long rectus abdominis muscles in the front; the externa… See more

In the old days, sit-ups and crunches were the go-to moves to keep your core muscles in good shape. But those exercises are not as effective as we once believed. They strengthen … See more

A much better approach to strengthening your core is working several core muscle groups at the same time, just the way you would naturally if you were lifting something or climbing… See more

If you haven't worked your core in a long time, Boehm suggests starting slowly, focusing on the quality of the exercise and gradually increasing the number of times you can do … See more