Guimarães, F., Piobelli, F., Fernandes, A. and Alves, J.V. 2011. 225 - COMPARATIVE ANALYSIS OF RECTUS ABDOMINAL MUSCLE MYOELECTRIC ACTIVATION IN THE COLUMN FLEXION ON STABLE AND NON STABLE SURFACES- A PILOT SUTDY. Fiep Bulletin - online. 80, 2 (Dec. 2011).