The cable core press is a core strengthening exercise that also improves shoulder stability.
Using an overhand grip, grab a D handle and attach it to a cable machine. Place the setting at about chest height. Stand with the machine to one side, feet shoulder-width apart, and grab the handle with both hands. Knees should be slightly bent. Holding the handle against your chest, be sure to keep the cable taut.
Brace your core and slowly press your arms out in front of you until they're completely straight. Pause and reverse direction to return to the starting position.
Squeeze your abs and glutes throughout the movement to keep your body stable.
Don't allow your body to rotate as you press the cable in front of your torso.
Hold the handle in front of your torso and use your abs to resist any movement.