Figure 4. Centre of pressure (COP) motor post-effects (leaning) are seen oriented in the same direction of contraction after 15 minutes isometric contraction. Extension (E), right posterior oblique (RPO), right lateral flexion (RLF), right anterior oblique (RAO), left posterior oblique (LPO), left lateral flexion (LLF), left anterior oblique (LAO), and flexion (F). White circle represents average change in COP.