It was a great and informative article about the core fitness. Nowadays many people are working out on the gym but they don't know about the actual meaning of exercise. They just pull out heavy weight without proper technique which can harm very badly to the body. So one should be very careful about doing exercise and improving the core fitness.
For building core strength, whole body functional training is definitely the way to go compared to machine based training. Core exercises should also primarily focus on stability rather than movement. Exercises like the Plank, side plank, and the ab wheel are better for building core strength than doing endless crunches...like so many tend to do.
