Hi Beth! I couldn't believe it when they told me to hold my breath while pushing during labor. It is the total opposite of what I am accustomed to doing. I tried it through three contractions since they "insisted" on me doing it this way, and I got a major headache and the blood vessels in my eyes were strained. To fill you in, I went into labor a month early at my shower away from home so I had doctors that I was not familiar with. So now not knowing these doctors, I was trying to be cooperative but I finally had to tell them that this holding breath method feels completely unnatural to me and to please let me try to exhale slowly as I went through the next contraction. He agreed since there was no progress up to that point. Well that was the answer. I slowly exhaled as I beared down through the contraction just letting enough air out as if a tire were slowly deflating. I had so much progress that I did just a few more like that and the baby was out. The doctor was so impressed that he joked around after the baby came out saying that he needed me to come back and train his staff with this aerobic method.
I'll let Sheila chime in here if she is reading but, correct me if I'm wrong, I believe the holding your breath method is referred to as "purple pushing" or "valsalva maneuver" and not highly recommended any more. I will look into this for you, Beth, and get back to you.