The Seated V exercise looks deceptively simple. But if done correctly, this tight, controlled movement will help strengthen deep core muscles (the diaphragm; internal obliques; transverse abdominus and pelvic floor) and improve flexibility, mobility and support of your torso and spine (the external obliques, thoracic lumbar fascia, rectus abdominis; hip flexors and lumbar erectors).1. While seated on a pad or the floor, bend...