The 13 Best Abs Exercises You Can Do Standing Up

4. Turns with the ball

• Hold a medicine ball with both hands at chest level, feet hip-width apart. 
• Lower the ball to the outside of your right foot, allowing your knees to flex naturally and your legs to pivot. 
• Now sweep the ball through your torso and over your head to the left, contracting your core muscles. 
• By increasing the speed of execution, you will create an additional workload. 
• Do 10 repetitions, then do the other side.