Benefits: Improve your core’s stability and rotational strength in one simple move that really targets your obliques and transverse abdominis.

• Lie with your upper back on a stability ball and your feet flat on the floor with your knees bent at a 90 degree angle. Brace your core and keep your hips extended so your torso forms a straight line from head to knees.
• Extend your arms straight above your chest and press your palms together. This is your starting position.
• Rotate your torso to roll onto one shoulder as far as you can while raising the other from the ball. Your hips should stay square with the floor.
• Reverse the move to return to the starting position.
• Repeat, rolling onto the opposite shoulder