If you want to develop a hard stomach and abs that resemble a chiseled greek sculpture then you need to make sure that you are including a range of exercises that cover all 3 planes of motion. The one plane of motion that tends to be neglected in most fitness and strength training programs is the transverse plane. This is the plane that involves rotation in the exercise.

1. Core Medicine Ball Rotation: With this exercise you can utilize either a medicine ball, kettlebell, or core ball. You basically want to begin this exercise by standing with your feet at slightly wider than shoulder width distance apart. You want to hold the sides of the medicine ball with your arms extended. Your arms should be extended to the right side of your hips. From here you want to squat to one side and touch the ball to the ground on that side. Once you touch the ball to that side then immediately pivot on the foot of the side of the ground you just touched and come back up. On the way up you want to rotate and punch the ball from your chest to the opposite side. So basically its a touch to the ground then pivot, stand up, and punch to the opposite side.

2. Rotational Push-Ups: This is a gruesome style of push-up that promotes tremendous core strength, stability, and lean muscle mass. You basically want to get into an upright push-up position with your feet slightly narrower than shoulder width distance apart. Next, execute a push-up, but after you ascend to the top of the push-up movement lift one hand off of the ground and rotate your trunk to point your finger to the ceiling. Immediately come back down into the upright position and execute another one to the opposite side. This is a great exercise to promote abdominal strength, six-pack abs, and tremendous stability.