Planks work your back, chest, shoulders, and neck in addition to your abs. Strengthening these muscles allows you to keep your shoulders back and your chest high. Planks also develop isometric strength in your core, which helps you stand up straight or sit up straight for long periods of time.
4 benefits of doing Planks:
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A toned belly
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Reduced back pain
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Flexibility
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Improve Your Balance and Posture
How to do:
Hold the trunk of your body off the ground in a straight line.
Like with any form of exercise, you will still need to have consistency, a balanced diet and carryout other forms of cardio vascular exercise to complement your plank exercise for the best results.