A. The respiratory diaphragm sits like a dome behind the rib cage (see Figure 1 above)
B. During your breath in, the diaphragm pulls down like a window shade, dropping into the abdomen causing the abdomen to bulge out gently (see Figure 2 above)
C. The pelvic floor muscles move in a downward direction during inhalation making room for the downward pressure from the diaphram on the internal abdominal organs. This causes a slight lengthening or relaxation of the pelvic floor muscles during our breath in (See Figure 3 above)
D. During exhalation (breathing out) the pelvic floor muscles lift in an upward direction, causing them to shorten slightly (see Figure 4 above)
See if you can feel this rhythm of the pelvic floor with your breathing. Most of us are not aware of any movement in our pelvic floor muscles; however, if we can allow movement during our breathing (not force it to happen, but observe that it does), our pelvic floor muscles will be better oxygenated and less tense throughout the day.