This old-school exercise mainly works the rectus abdominis, the muscle used for spinal flexion and that elusive six-pack definition. The supporting muscles such as the obliques help in rotation of ...

In two first tests the ‘stabilizer’ pressure biofeedback unit was used to measure the influence of the global muscle system on trunk stability ... Results Uncontrolled movements in lower back in low ...

Some studies have found higher hamstring muscle extensibility in dancers than other athletes. Objective To classify sagittal thoracic and lumbar curves when performed a maximum trunk flexion with ...