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8 Sit Up Abs Exercises to Build a 6 Pack and Strong Core


crossfit exercises plank six pack absSource: crossfitbk
The Plank is a great way to strength your core and build six pack abs

The Plank helps you to build strength in your core, upper and lower body so it is a good full body work out. You do not need any equipment to perform this exercise all you need is a bit of space, and it really helps improve flexibility by stretching muscles and will improve posture if performed regularly.

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