I have been teaching prenatal yoga classes for a number of years now, and over this time have come to admire the almighty squat. Back in the day, we used to teach our mums that 100 pelvic floor lifts a day would help prepare them for the birth of their babies. Much has now been learnt about this topic.
A kegel, or pelvic floor lift, attempts to strengthen the pelvic floor muscle, but it really only seems to pull the sacrum inwards promoting even more weakness and more pelvic floor gripping. The muscles that balance out the anterior pull on the sacrum are called the gluteal muscles (glutes). A lack of glutes (no butt) is what makes this group of muscles so much more susceptible to pelvic floor disorder (PFD). Also, no lumbar curvature (curve at the small of the back) is the most telling sign that the pelvic floor is beginning to weaken.
As your baby gets larger and applies more pressure to your spinal cord, the sciatic nerve, which runs all the way down the back of the leg to your foot, can become compressed, and may start giving you a degree of discomfort.
Sciatic pain takes many forms ranging from tingling sensations in your legs, to a sharp, stabbing pain. When severe, it can also cause the leg to go numb when standing or walking.