Although they may look quite different, seated-waist-rotation and lateral-waist-flexion exercises activate the same main muscles.
Hip-flexion and hip-and-waist-flexion exercises
Pure Spinal Lateral Flexion Alternate Direction (Hands Behind Head) - TUTORIAL
Anti-Movement Workout for a 360-Degree Core
Anatomy of the side body stretch - Ekhart Yoga
Back Stretches for Full Spinal Flexibility — Dani Winks Flexibility
Hamstring Workouts - Best Exercises for Muscle and Strength
Shoulder Abduction Exercise Seated
The 3 Most Effective Exercises for Developing Hip Internal and External Rotation – EasyFlexibility
Spinal Strengthening Exercises
Joint articulations and the three planes of motion - Muscle Activation Guide
Anti-Movement Workout for a 360-Degree Core
Delt Workouts - Best Exercises for Muscle and Strength
33 Resistance Band Exercises: Legs, Arms, Abs, and More
Home rehabilitation: Legs and body exercises