The pallof press is the excellent anti-rotational exercise that puts great demand on the trunk to stop it rotating in a transverse plane. To perform, assume an athletic posture with knees bent, pelvis and lumbar (lower) spine neutral, and shoulders relaxed.
As you push the cable in front of you, focus on engaging the core, stopping the rotation of your trunk. Keep it as rigid as possible, hold for 2-5secs and pull back into your center.
You can perform the Pallof Press in various stances, kneeling, split stance on floor or off and lastly parallel.