What is poor posture – exercises to fix bad posture
Figure 1. Ideal postural alignment and muscles of the core.
Improving the core is more than having a good looking six pack, the core muscles are linked to your posture. When muscles are short and tight they pull joints into incorrect positions.
For example, in the figure 2 (please see below) we see in diagram labelled C that the muscles in the back of the legs are overly strong and dominant causing the pelvis to be pulled downwards.
While the muscles of the abdominals are pulling up. This is causing the spine to be too flat. In APT, the muscles are pulling the pelvis in the opposite direction causing the spine to become too rounded.