Training lateral and rotational exercises will improve your strength and power in all movements, and is critical for transference to torso stability, gait, jumping, running, grappling, throwing a ball…basically all movement.
Rotational movements also help open up and strengthen the hip muscles that can tighten after training in bi-lateral planes of movement, and can become weak from the lack of challenge found with hinge-only exercises.
This is why Cossack Squats, Banded kneeling/standing rotations, lateral lunges, trunk exercises are placed within the 98 Performance Program.