Pregnancy – Changes and Aches
If you are pregnant and feel your back or pelvic pains more often than usual, you are not alone. Studies have shown that more than two-thirds of pregnant women experience back pain and almost one-fifth experience pelvic pain2,.3. As pregnancy progresses, the intensity of pain may increase and interfere with your work, daily activities and sleep.
Causes my back and pelvic pains
As your pregnancy advances, your back experiences more strain from three key changes – a shift in your centre of gravity, hormonal changes and abdominal muscles changes.
Centre of Gravity Shift
Your centre of gravity shifts forward due to the growing bump. This accentuates the curvature of the spine and adds stress to the spinal joints, contributing to the tightening of your spinal muscles. The growing bump also adds extra load on joints, and that means more work for the back muscles, which is why your back pain may worsen as the day progresses as they tire.
Relaxin, a hormone produced during pregnancy, acts on ligaments making them suppler. The ligaments that hold the pelvis bones together gradually loosen to prepare you for labour and birth. Unfortunately, this compromises joint stability of the pelvis. Making you feel less steady and cause pain when you sit for long periods, stand, walk, roll over in bed, get out of a low chair, bend, and lift.
Abdominal Muscles Changes
The expanding size of the uterus stretches the abdominal muscles reducing support for the spine. Diastasis recti, a pregnancy-induced condition, is the separation of the rectus abdominis muscles in the middle, reducing the ability of the abdominal muscles to support the pelvis and spine1.
Common areas of back pain during pregnancy
Expecting mother most typically experience low back (lumbar pain) and posterior pelvic or sacroiliac back pain.
With low back pain, you feel it across the lower spine, near or at the level of your waist. Prolonged sitting or standing usually makes it worse, so does wearing high heels. It tends to be more intense towards the end of the day.
Posterior pelvic pain is typically felt at or near the 2 dimples at the back of your pelvis (hip). You feel the pain deep inside the buttocks or in the back of your thighs on one or both sides. Activities that aggravate the pain include walking, climbing stairs, resting on one leg, getting in and out of a low chair, rolling over and twisting in bed, and lifting.
What can I do to prevent back pain?
If you have a history of back pain, you are more likely to get it again. You are also prone to back pains if you lead a sedentary lifestyle and have weak back and abdominal muscles with poor flexibility.
To prevent recurrence, start on an exercise program to stretch and strengthen muscles that support the back, which include your abdominals. Remember first to get clearance from your doctor before you start any exercise program.
Adopt good postures in your daily life will do wonders for your back.
• Standing. Stand up straight. This gets harder to do as pregnancy progresses, but try to keep your chin tucked in, drawing your shoulders back and down with the tummy and bottom tucked in. Expectant women tend to slump their shoulders and arch their backs as their bumps grow, which puts more strain on the spine.
• Sitting. Try to avoid prolong sitting and get up take frequent breaks. Support your feet with a footstool can help reduce back pain, and using small pillow to support your lower back helps too.
• Lifting. Bend at your knees, keeping your back straight and lift using the strong thigh muscles instead of the small muscles of the back. Do not twist as you are lifting. Get help for heavy objects.
• Sleeping. To rest better at night, sleep on your side with one or both knees bent and a pillow between your legs. As your pregnancy advances, use a rolled up towel or small pillow to support your tummy.
Finally yet importantly, pay attention to your body. If you find that a particular activity or exercise aggravates your pain, stop doing it. Ask your doctor or physiotherapist whenever in doubt!
- Kisner C and Colby L.A. Therapeutic Exercise: Foundations and Techniques (4th Edition).
- Pennick VE, Young G. Cochrane Database Syst Rev. 2007 Apr 18;(2):CD001139
- Young G, Jewell D. Interventions for preventing and treating pelvic and back pain in pregnancy. Cochrane Database Syst Rev 2002;(1): CD001139
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