Offset Chest Press

From a lying position on a swiss ball, grab a weight and press it up over your shoulder. Then pull your hips up, flexing your glutes and core, while shifting the pressing shoulder off the ball. Maintain hip alignment not letting the opposite hip drop. Then maintain this position while pressing the weight down and up. Keep your head supported by the ball. Use a rug or other non slip floor to maintain foot pressure. Maintain equal height in the hip

As you get more comfortable, shift the pressing shoulder further off the ball. This exercise can be done super slow to increase difficulty.