Postural Changes During Pregnancy.
What happens to your posture during pregnancy?
Postural changes during pregnancy refer to alterations in body alignment and posture that occur as a result of the physiological and biomechanical changes associated with pregnancy. These changes may include an increase in the curvature of the lower back (lumbar lordosis), a forward shift of the centre of gravity, and rounding of the shoulders and upper back.
These changes are not a sign that something is going wrong — they are a normal and necessary adaptation to the growing uterus, the shifting centre of gravity, and the hormonal changes that prepare the body for birth. Understanding why they happen, what symptoms they can produce, and what can be done about them is the purpose of this page.
The three trimesters — what changes and when
First trimester — the postural changes in early pregnancy are relatively subtle. The uterus is still within the pelvis and the visible body changes are minimal. However, breast tenderness and early breast enlargement begin to shift the upper body load, and fatigue — which is often pronounced in the first trimester — reduces the energy available for maintaining good posture throughout the day. Nausea can alter activity levels and compound postural habits.
Second trimester — this is when the most significant biomechanical changes begin. As the uterus enlarges above the pelvis, the growing abdomen shifts the centre of gravity forward. The lumbar spine responds by increasing its natural inward curve (lordosis) to counterbalance the anterior load. The abdominal muscles — particularly the rectus abdominis and the obliques — lengthen as the uterus expands, progressively reducing their ability to support the spine. The linea alba — the connective tissue between the two halves of the rectus abdominis — stretches, producing some degree of diastasis recti in virtually all pregnancies by the third trimester.
The thoracic spine and rib cage adapt to accommodate the expanding uterus pushing upward, often producing rib flaring and upper back rounding. Breast growth and increasing breast weight contribute to thoracic kyphosis and forward head posture. These upper body changes are particularly significant in the second and third trimesters.
Third trimester — all of the above changes intensify. The lumbar lordosis reaches its maximum, the abdominal muscles are at their greatest length and least effective, and the additional weight of the baby, placenta and amniotic fluid (which can total 10-15 kilograms above pre-pregnancy weight) is fully loaded through the spine, pelvis and lower limbs. The hormone relaxin — which has been progressively loosening the ligaments throughout pregnancy to prepare the pelvis for delivery — is at its highest levels, contributing to joint laxity that can affect the pelvis, hips, feet and spine.
What symptoms can these changes produce?
The postural changes of pregnancy are associated with a predictable cluster of musculoskeletal symptoms.
Pregnancy-related lower back pain is the most common, affecting up to 70% of pregnant women. The increased lumbar lordosis places greater compressive load on the lumbar facet joints and increases the tensile demand on the lumbar extensor muscles, both of which contribute to lower back pain.
Pelvic girdle pain — pain in the sacroiliac joints and symphysis pubis — affects up to one in five pregnant women and is driven by the combination of increased joint laxity, altered load transfer through the pelvis, and the postural changes in the lumbar spine and hips.
Upper back, neck and shoulder pain develop from the thoracic kyphosis, forward head posture and breast weight loading. Cervicogenic headaches from upper cervical loading are a recognised pattern.
Rib pain — from rib cage flaring and the pressure of the expanding uterus against the lower ribs — is particularly common in the third trimester.
Pelvic floor dysfunction — both weakness and overactivity — develops in response to the increased downward pressure from the growing uterus and the altered pelvic mechanics of pregnancy.
Foot pain and flat feet can develop or worsen during pregnancy as relaxin-related laxity affects the foot arches and the additional body weight increases plantar loading.
How can physiotherapy help?
Women's health physiotherapy offers evidence-based interventions to address postural changes during pregnancy and promote optimal alignment and function, focusing on instruction on proper posture and body mechanics during daily activities, ergonomic advice for sitting, standing, lifting and sleeping, and targeted exercises to strengthen the deep core muscles including the transverse abdominis and pelvic floor.
Physiotherapy assessment during pregnancy identifies which specific postural changes are contributing to the patient's symptoms and tailors intervention accordingly. For lower back pain, deep core retraining using real time ultrasound to visualise the transversus abdominis and multifidus provides precise biofeedback on deep muscle activation. For upper back and neck symptoms, thoracic mobility work, postural education, and deep cervical flexor training are the priorities.
Manual therapy — gentle joint mobilisation and soft tissue techniques — provides symptomatic relief that facilitates participation in the exercise program. Supportive belts and bracing for pelvic girdle pain and lower back support reduce pain during daily activities.
Clinical Pilates — specifically our prenatal Pilates course — provides the structured, safe exercise environment that addresses postural changes throughout all three trimesters. The emphasis on pelvic floor and deep core activation, thoracic extension, and body awareness is directly aligned with the postural rehabilitation needs of pregnancy.
Our physiotherapists Bethany Kippen and Emma Cameron both have experience in women's health physiotherapy and pregnancy-related musculoskeletal 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.
Postural changes during pregnancy refer to alterations in body alignment and posture that occur as a result of the physiological and biomechanical changes associated with pregnancy. These changes may include an increase in the curvature of the lower back (lumbar lordosis), a forward shift of the centre of gravity, and rounding of the shoulders and upper back.
These changes are not a sign that something is going wrong — they are a normal and necessary adaptation to the growing uterus, the shifting centre of gravity, and the hormonal changes that prepare the body for birth. Understanding why they happen, what symptoms they can produce, and what can be done about them is the purpose of this page.
The three trimesters — what changes and when
First trimester — the postural changes in early pregnancy are relatively subtle. The uterus is still within the pelvis and the visible body changes are minimal. However, breast tenderness and early breast enlargement begin to shift the upper body load, and fatigue — which is often pronounced in the first trimester — reduces the energy available for maintaining good posture throughout the day. Nausea can alter activity levels and compound postural habits.
Second trimester — this is when the most significant biomechanical changes begin. As the uterus enlarges above the pelvis, the growing abdomen shifts the centre of gravity forward. The lumbar spine responds by increasing its natural inward curve (lordosis) to counterbalance the anterior load. The abdominal muscles — particularly the rectus abdominis and the obliques — lengthen as the uterus expands, progressively reducing their ability to support the spine. The linea alba — the connective tissue between the two halves of the rectus abdominis — stretches, producing some degree of diastasis recti in virtually all pregnancies by the third trimester.
The thoracic spine and rib cage adapt to accommodate the expanding uterus pushing upward, often producing rib flaring and upper back rounding. Breast growth and increasing breast weight contribute to thoracic kyphosis and forward head posture. These upper body changes are particularly significant in the second and third trimesters.
Third trimester — all of the above changes intensify. The lumbar lordosis reaches its maximum, the abdominal muscles are at their greatest length and least effective, and the additional weight of the baby, placenta and amniotic fluid (which can total 10-15 kilograms above pre-pregnancy weight) is fully loaded through the spine, pelvis and lower limbs. The hormone relaxin — which has been progressively loosening the ligaments throughout pregnancy to prepare the pelvis for delivery — is at its highest levels, contributing to joint laxity that can affect the pelvis, hips, feet and spine.
What symptoms can these changes produce?
The postural changes of pregnancy are associated with a predictable cluster of musculoskeletal symptoms.
Pregnancy-related lower back pain is the most common, affecting up to 70% of pregnant women. The increased lumbar lordosis places greater compressive load on the lumbar facet joints and increases the tensile demand on the lumbar extensor muscles, both of which contribute to lower back pain.
Pelvic girdle pain — pain in the sacroiliac joints and symphysis pubis — affects up to one in five pregnant women and is driven by the combination of increased joint laxity, altered load transfer through the pelvis, and the postural changes in the lumbar spine and hips.
Upper back, neck and shoulder pain develop from the thoracic kyphosis, forward head posture and breast weight loading. Cervicogenic headaches from upper cervical loading are a recognised pattern.
Rib pain — from rib cage flaring and the pressure of the expanding uterus against the lower ribs — is particularly common in the third trimester.
Pelvic floor dysfunction — both weakness and overactivity — develops in response to the increased downward pressure from the growing uterus and the altered pelvic mechanics of pregnancy.
Foot pain and flat feet can develop or worsen during pregnancy as relaxin-related laxity affects the foot arches and the additional body weight increases plantar loading.
How can physiotherapy help?
Women's health physiotherapy offers evidence-based interventions to address postural changes during pregnancy and promote optimal alignment and function, focusing on instruction on proper posture and body mechanics during daily activities, ergonomic advice for sitting, standing, lifting and sleeping, and targeted exercises to strengthen the deep core muscles including the transverse abdominis and pelvic floor.
Physiotherapy assessment during pregnancy identifies which specific postural changes are contributing to the patient's symptoms and tailors intervention accordingly. For lower back pain, deep core retraining using real time ultrasound to visualise the transversus abdominis and multifidus provides precise biofeedback on deep muscle activation. For upper back and neck symptoms, thoracic mobility work, postural education, and deep cervical flexor training are the priorities.
Manual therapy — gentle joint mobilisation and soft tissue techniques — provides symptomatic relief that facilitates participation in the exercise program. Supportive belts and bracing for pelvic girdle pain and lower back support reduce pain during daily activities.
Clinical Pilates — specifically our prenatal Pilates course — provides the structured, safe exercise environment that addresses postural changes throughout all three trimesters. The emphasis on pelvic floor and deep core activation, thoracic extension, and body awareness is directly aligned with the postural rehabilitation needs of pregnancy.
Our physiotherapists Bethany Kippen and Emma Cameron both have experience in women's health physiotherapy and pregnancy-related musculoskeletal 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.
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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].