Breathing is meant to come from the abdomen/diaphragm, not from the chest. If you've been taught by sports or cultural influences to suck in your abs and breathe from your chest you may need to re-train your body to breathe appropriately. Musculoskeletally, the respiratory diaphragm and the pelvic floor work together.
As you inhale .... the diaphragm lowers and the pelvic floor expands.
As you exhale... the diaphragm and pelvic floor return to their elevated positions.
Therefore, if you are constantly breathing from your chest, your pelvic floor never gets a chance to relax and expand. Mentally check into your breath pattern throughout the day to ensure proper breathing techniques. We go more in depth about how to do this in the DVD, Healing the Pain 'Down There': A Guide for Females with Persistent Genital and Sexual Pain.