Flatten Your Stomach In Only 28 Days With Only 1 Exercise

This exercise combined with a healthy diet will dramatically reduce your stomach size. Over at ‘Not Your Average Runner‘ they strongly believe in planking. Planking targets various muscle groups at once which include abs, back, chest, shoulders and butt. Planking is a critical exercise for strengthening the lower back.

Here is a great routine timetable for planking provided by Not Your Average Runner

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Source: notyouraveragerunner.com
How To: Perfect Plank