In order to get a truly shredded core, you have to be sure that your core workout includes exercises that will hit every muscle from every angle. You see, the core is much more than a buzzword when it comes to training and working out. It's literally the center point of focus for which all important trunk muscles (yes, including the obvious six pack abs that define the truly impressive core) cross and attach within.
One of these often overlooked core muscles is the serratus anterior. The serratus is a muscle that originates on your upper rib cage and attaches to the medial border of your shoulder blade. Its job is to help protract or reach your arm out in front of you, similar to when you throw a punch as a fighter or boxer.
From a nonathletic standpoint you can see that the serratus helps to actually frame out your abs, obliques and lower chest. It can taper in your torso and give you an even better looking set of 6 pack abs.
The three exercises shown in this video, give you three options to work on developing your serratus so you can have a more impressive ripped midsection and core. If you're already following the Athlean-X program you'll be used to the first core exercise shown here. The last two, not so much.
It's exercises like this that make your core and abs work much harder and much more completely. When you train muscles completely and the way they are intended to be trained, you start to see much faster results. It's that simple.
For a complete 90 day workout program that will help you to build a complete core and ripped abs, as well as an explosive upper and lower body...be sure to check out the Athlean-X Training System at http://athleanx.com