Muscles have layers, like onions…
Midline stabilization is essential for functional movement (crossfit.com). A stable midline allows all other muscle groups to work together while minimizing risk of injury. Matt D touched on this in last week’s form post about abs, and it is worth repeating.
How many times during a typical day do you do a crunch-like or sit-up-like movement? Maybe once or twice, if at all? Now how many times do you twist, bend, squat, stand, push, pull, carry a load? Probably more than you can remember!
Underneath the ‘vanity’ muscles in the body (think abs, calves, etc) there are layers of hidden muscles that are doing most of the work. Work those and the rest will follow.