Pregnancy-Related Back Pain.
Back pain during pregnancy — common but manageable
Back pain during pregnancy is one of the most prevalent pregnancy complaints, affecting approximately 50 to 80% of pregnant women at some point across the three trimesters. While often dismissed as an inevitable part of pregnancy, back pain that is significant enough to limit daily activities, disturb sleep or restrict work participation is not simply something to endure — physiotherapy produces meaningful improvements in pregnancy-related back pain and is safe and appropriate throughout pregnancy.
The most important clinical distinction in pregnancy-related back pain is between lumbar back pain and pelvic girdle pain — these are distinct conditions with different mechanisms, different clinical features and different physiotherapy management approaches. This page focuses on lumbar back pain in pregnancy. For pelvic girdle pain — pain in the sacroiliac joints, pubic symphysis and surrounding pelvic structures — see our dedicated pelvic girdle pain page. Many women experience both concurrently, and assessment by a physiotherapist familiar with both conditions is important for getting the management right.
Why does back pain develop during pregnancy?
Several interconnected mechanisms contribute to lumbar back pain in pregnancy, and understanding them guides the physiotherapy approach.
Postural changes — as the uterus and baby grow, the increasing anterior abdominal load shifts the centre of gravity forward. To maintain balance, the lumbar spine increases its lordosis (the inward curve of the lower back), the thoracic spine increases its kyphosis, and the shoulders round forward. This altered spinal alignment increases the compressive and shear loads on the lumbar facet joints, discs and paraspinal muscles. See our postural changes during pregnancy page for more detail on the postural aspects.
Abdominal muscle dysfunction — the progressive stretching and separation of the rectus abdominis muscles during pregnancy reduces the core support available to the lumbar spine. The deep stabilising muscles — transversus abdominis and multifidus — are also compromised as their normal activation patterns are disrupted by the changing abdominal mechanics. This reduced deep core support increases the demand on the passive structures of the lumbar spine — the discs, facet joints and ligaments — during movement and loading.
Relaxin and ligamentous laxity — the hormone relaxin, produced in increasing quantities during pregnancy, softens and lengthens the ligaments throughout the body, including those supporting the lumbar spine and pelvis. While primarily a mechanism for facilitating birth, this generalised ligamentous laxity reduces the passive stability of all spinal joints and increases the muscular demand for dynamic stabilisation.
Weight gain and altered mechanics — the additional body weight of pregnancy increases the compressive loads on all weight-bearing joints including the lumbar spine, particularly during prolonged standing, walking and bending.
Muscle fatigue — the paraspinal muscles work harder to maintain the altered postural alignment of pregnancy, and fatigue with prolonged standing and activity produces the aching lower back pain that many pregnant women notice particularly in the third trimester.
How is pregnancy-related back pain assessed?
A physiotherapy assessment for pregnancy-related back pain distinguishes between lumbar pain and pelvic girdle pain, identifies the specific structures contributing to symptoms, and assesses the functional impact on daily activities, work and sleep. Special tests including the ASLR (Active Straight Leg Raise) test and posterior pelvic pain provocation (P4) test help distinguish lumbar from pelvic sources. Posture, movement quality, core activation and muscle balance are assessed to guide the rehabilitation program. Imaging is rarely required or appropriate during pregnancy.
Red flags — including neurological symptoms (radiating leg pain, numbness, weakness, bladder or bowel changes) — require urgent medical assessment regardless of pregnancy status.
How can physiotherapy help?
Physiotherapy is safe, effective and evidence-based for pregnancy-related back pain throughout all trimesters. Treatment is adapted to the specific trimester, the patient's symptoms and functional goals, and the safe exercise parameters for pregnancy.
Postural education and ergonomic advice — guidance on maintaining optimal spinal alignment during sitting, standing, lifting, sleeping and daily activities — is one of the most impactful and immediately practical interventions. Specific advice on sleeping positions (supported side-lying with pillow between knees), workstation setup, lifting technique and activity pacing directly reduces the postural and mechanical load on the lumbar spine. Ergonomic advice for activities such as sitting, standing, lifting and breastfeeding reduces the risk of exacerbating back pain.
Deep core and pelvic floor activation — retraining transversus abdominis and multifidus function in the context of the changing abdominal mechanics of pregnancy — provides the dynamic lumbar stability that reduces pain during movement and activity. Real time ultrasound is particularly valuable here — it directly visualises deep abdominal and pelvic floor muscle activation, making the retraining precise and confirming correct technique in a way that verbal cueing alone cannot.
Manual therapy — gentle manual therapy techniques such as massage and joint mobilisations alleviate muscle tension and improve joint mobility in the back and pelvis. Soft tissue techniques including stretching and myofascial release relieve tightness and discomfort in the muscles surrounding the lumbar spine. Manual therapy is adapted for pregnancy — positions are modified for safety and comfort, and techniques are selected for their safety and efficacy in the pregnant population.
Exercise prescription — a progressive exercise program addressing the specific deficits identified at assessment, including deep stabiliser retraining, hip and gluteal strengthening, and thoracic mobility work — addresses the underlying contributors to lumbar load rather than just managing the symptoms.
Support garments — maternity belts and sacroiliac joint belts provide external pelvic and lumbar support that can meaningfully reduce pain during activity, particularly in the second and third trimesters. Selection of the appropriate garment and wearing instructions are provided as part of physiotherapy management.
Clinical Pilates — adapted for each stage of pregnancy — provides a structured, supervised exercise environment that directly addresses the core and pelvic floor work central to pregnancy-related back pain management. Our Prenatal Pilates 8-week course is specifically designed for pregnant women and provides ongoing supervised exercise support throughout pregnancy in a small group format.
Our physiotherapists Bethany Kippen and Emma Cameron both have experience in women's health and pregnancy-related conditions and are members of the Australian Physiotherapy Association.
To book or find out more, call us on 07 3706 3407 or book online below. We see patients from across Brisbane's southside including Tarragindi, Coorparoo, Holland Park, Greenslopes and Mt Gravatt.
Back pain during pregnancy is one of the most prevalent pregnancy complaints, affecting approximately 50 to 80% of pregnant women at some point across the three trimesters. While often dismissed as an inevitable part of pregnancy, back pain that is significant enough to limit daily activities, disturb sleep or restrict work participation is not simply something to endure — physiotherapy produces meaningful improvements in pregnancy-related back pain and is safe and appropriate throughout pregnancy.
The most important clinical distinction in pregnancy-related back pain is between lumbar back pain and pelvic girdle pain — these are distinct conditions with different mechanisms, different clinical features and different physiotherapy management approaches. This page focuses on lumbar back pain in pregnancy. For pelvic girdle pain — pain in the sacroiliac joints, pubic symphysis and surrounding pelvic structures — see our dedicated pelvic girdle pain page. Many women experience both concurrently, and assessment by a physiotherapist familiar with both conditions is important for getting the management right.
Why does back pain develop during pregnancy?
Several interconnected mechanisms contribute to lumbar back pain in pregnancy, and understanding them guides the physiotherapy approach.
Postural changes — as the uterus and baby grow, the increasing anterior abdominal load shifts the centre of gravity forward. To maintain balance, the lumbar spine increases its lordosis (the inward curve of the lower back), the thoracic spine increases its kyphosis, and the shoulders round forward. This altered spinal alignment increases the compressive and shear loads on the lumbar facet joints, discs and paraspinal muscles. See our postural changes during pregnancy page for more detail on the postural aspects.
Abdominal muscle dysfunction — the progressive stretching and separation of the rectus abdominis muscles during pregnancy reduces the core support available to the lumbar spine. The deep stabilising muscles — transversus abdominis and multifidus — are also compromised as their normal activation patterns are disrupted by the changing abdominal mechanics. This reduced deep core support increases the demand on the passive structures of the lumbar spine — the discs, facet joints and ligaments — during movement and loading.
Relaxin and ligamentous laxity — the hormone relaxin, produced in increasing quantities during pregnancy, softens and lengthens the ligaments throughout the body, including those supporting the lumbar spine and pelvis. While primarily a mechanism for facilitating birth, this generalised ligamentous laxity reduces the passive stability of all spinal joints and increases the muscular demand for dynamic stabilisation.
Weight gain and altered mechanics — the additional body weight of pregnancy increases the compressive loads on all weight-bearing joints including the lumbar spine, particularly during prolonged standing, walking and bending.
Muscle fatigue — the paraspinal muscles work harder to maintain the altered postural alignment of pregnancy, and fatigue with prolonged standing and activity produces the aching lower back pain that many pregnant women notice particularly in the third trimester.
How is pregnancy-related back pain assessed?
A physiotherapy assessment for pregnancy-related back pain distinguishes between lumbar pain and pelvic girdle pain, identifies the specific structures contributing to symptoms, and assesses the functional impact on daily activities, work and sleep. Special tests including the ASLR (Active Straight Leg Raise) test and posterior pelvic pain provocation (P4) test help distinguish lumbar from pelvic sources. Posture, movement quality, core activation and muscle balance are assessed to guide the rehabilitation program. Imaging is rarely required or appropriate during pregnancy.
Red flags — including neurological symptoms (radiating leg pain, numbness, weakness, bladder or bowel changes) — require urgent medical assessment regardless of pregnancy status.
How can physiotherapy help?
Physiotherapy is safe, effective and evidence-based for pregnancy-related back pain throughout all trimesters. Treatment is adapted to the specific trimester, the patient's symptoms and functional goals, and the safe exercise parameters for pregnancy.
Postural education and ergonomic advice — guidance on maintaining optimal spinal alignment during sitting, standing, lifting, sleeping and daily activities — is one of the most impactful and immediately practical interventions. Specific advice on sleeping positions (supported side-lying with pillow between knees), workstation setup, lifting technique and activity pacing directly reduces the postural and mechanical load on the lumbar spine. Ergonomic advice for activities such as sitting, standing, lifting and breastfeeding reduces the risk of exacerbating back pain.
Deep core and pelvic floor activation — retraining transversus abdominis and multifidus function in the context of the changing abdominal mechanics of pregnancy — provides the dynamic lumbar stability that reduces pain during movement and activity. Real time ultrasound is particularly valuable here — it directly visualises deep abdominal and pelvic floor muscle activation, making the retraining precise and confirming correct technique in a way that verbal cueing alone cannot.
Manual therapy — gentle manual therapy techniques such as massage and joint mobilisations alleviate muscle tension and improve joint mobility in the back and pelvis. Soft tissue techniques including stretching and myofascial release relieve tightness and discomfort in the muscles surrounding the lumbar spine. Manual therapy is adapted for pregnancy — positions are modified for safety and comfort, and techniques are selected for their safety and efficacy in the pregnant population.
Exercise prescription — a progressive exercise program addressing the specific deficits identified at assessment, including deep stabiliser retraining, hip and gluteal strengthening, and thoracic mobility work — addresses the underlying contributors to lumbar load rather than just managing the symptoms.
Support garments — maternity belts and sacroiliac joint belts provide external pelvic and lumbar support that can meaningfully reduce pain during activity, particularly in the second and third trimesters. Selection of the appropriate garment and wearing instructions are provided as part of physiotherapy management.
Clinical Pilates — adapted for each stage of pregnancy — provides a structured, supervised exercise environment that directly addresses the core and pelvic floor work central to pregnancy-related back pain management. Our Prenatal Pilates 8-week course is specifically designed for pregnant women and provides ongoing supervised exercise support throughout pregnancy in a small group format.
Our physiotherapists Bethany Kippen and Emma Cameron both have experience in women's health and pregnancy-related conditions and are members of the Australian Physiotherapy Association.
To book or find out more, call us on 07 3706 3407 or book online below. We see patients from across Brisbane's southside including Tarragindi, Coorparoo, Holland Park, Greenslopes and Mt Gravatt.
Who to book with:
If you are unsure about which appointment type is right for you, please don't hesitate to get in touch with our friendly reception staff by calling 07 3706 3407 or emailing [email protected].