Walking Ski Abs
The Walking Ski Abs exercise works your shoulders, chest, arms and abs.
In plank position, take two small steps under your body to the left side as if you're walking your feet forward until your knee almost touches your elbow. Reverse. Walking your feet back to plank, stepping first with the opposite foot than what you started with. Then repeat to the right side. Continue for one minute, alternating sides. Do two sets, total.