Lower ab booster: Mogul jump How to Do the Exercise: To do the mogul jump, start in a pushup position. Keep your knees off the ground. Hold your weight on your hands and the balls of your feet. Keep your legs together and your arms straight. Hop and rotate your knees and feet to the right. Repeat the movement to the left. That is one rep. Keep hopping back and forth, only moving your torso and legs for 20 reps.
Here are some abdominal exercises that can be done standing up, such as marching with a twist, weighted side bends, standing side crunch, and more. http://fitness.mercola.com/sites/fitness/archive/2016/04/22/standing-ab-exercises.aspx