Plank

You can significantly increase your core strength by doing this single exercise. The plank (or less commonly referred to as the 'hover', 'abdominal bridge' and 'front hold') is an isometric exercise (static = no joint or muscle movement).  The plank can be modified, however, the most common is belly button facing the ground, holding the body up and off of the ground with two points: the forearms and toes.  Planking tightens, strengthens and conditions: the shoulders, back, butt, stomach, chest and legs. Planking for mere minutes a day will make significant positive physical changes that you can both see and feel. 

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