Abs and core exercises don't take very long to do, but must be done correctly
As I have written on so many previous occasions, having good core strength is the foundation upon which every other muscle group lies and it is essential for a well-balanced and strong body. This is where it differs from the abs, and although you may have reasonably strong abs your core may not be as well developed as you think.
Contrary to popular belief, the core is not just your abdominal muscles, it includes the rectus and transverse abdominis, the internal and external obliques, the muscles in your back, pelvic floor and hips. The core even extends into the diaphragm, neck and more.
The abs, on the other hand, are made up of the transverse abdominis, rectus abdominis, and internal and external obliques.
When worked out effectively and, most importantly, when the body fat percentage is low, you will see what's more commonly referred to as a six-pack. This is when people can get really disillusioned with their training, as most people will carry extra body fat around their mid-section. Unfortunately, no matter how much you work your abdominals you will never truly see the results unless body fat is low.
Read my article on Independent.ie