What is Trendelenburg Gait?
Understanding the Hip Drop Pattern
Trendelenburg gait is an abnormal walking pattern caused by weakness in the hip abductor muscles, most commonly the gluteus medius. During normal walking, the hip abductors on the standing leg keep the pelvis level. When these muscles are weak, the pelvis drops on the opposite side with each step, creating a visible limp or waddling pattern.
The name comes from Friedrich Trendelenburg, a German surgeon who first described the sign in 1895. More than a century later, it remains one of the most recognisable gait patterns assessed by Physiotherapists and rehabilitation professionals.
Trendelenburg gait is not a disease. It is a signal. Something is affecting the strength or control of the hip abductors, and the cause could be muscular, neurological, or structural.
Finding that cause is the first step toward getting it right.
StatPearls (NCBI) provides a detailed clinical overview of Trendelenburg gait, including its biomechanics and diagnostic criteria.
What Causes Trendelenburg Gait?
Common Causes of Hip Abductor Weakness
The hip abductors can weaken for many reasons. Some are sudden. Some build over years. Understanding which one applies to you matters, because the treatment path depends on the cause.
Gluteus medius weakness is the single most common cause. Disuse weakens it. So does injury. So does prolonged bed rest. People who sit for long periods, have had a lower limb injury, or have been immobile after surgery are at higher risk.
Hip replacement surgery can temporarily damage or stretch the gluteus medius and its nerve supply, particularly with lateral or posterior approaches. Most people recover with targeted rehabilitation.
Hip osteoarthritis changes how you move. You offload the sore side without thinking about it. The hip abductors weaken from reduced use.
Neurological conditions affecting the superior gluteal nerve can impair gluteus medius function, including lumbar radiculopathy (L4-L5), poliomyelitis, and peripheral neuropathy.
Other causes include hip dysplasia, muscular dystrophy, cerebral palsy, and stroke affecting the motor cortex or descending motor pathways.
How to Identify Trendelenburg Gait
The hallmark sign is a pelvic drop. One side dips when it should stay level.
Picture this. You stand on your right leg. The left side of your pelvis should hold steady, maybe even rise slightly. But if your right hip abductors are weak, the left side drops. Your body compensates: your trunk leans toward the weak side to shift your centre of gravity.
Watch for these signs:
- Pelvic drop: The pelvis tilts downward on the swinging-leg side with each step
- Trunk lean: The upper body shifts toward the stance leg to compensate
- Shortened stride: The swinging leg has to clear the ground despite the dropped pelvis
- Waddling pattern: When both sides are affected, alternating drop and lean creates a side-to-side motion
Many people with a mild pattern never realise it. The body adapts. The compensation becomes your normal. A Physiotherapist can identify the pattern through observation and specific testing, often in the first few minutes of an assessment.
What is:
The Trendelenburg Sign?
The Trendelenburg sign is a clinical observation. It is not the same thing as the Trendelenburg test, even though the names sound alike.
The sign is what a Physiotherapist sees when they watch someone stand on one leg. If the hip on the unsupported side drops instead of staying level, that is a positive Trendelenburg sign.
A positive sign usually points to weakness in the hip abductor muscles, mainly the gluteus medius, on the standing leg. It can also point to a nerve issue affecting those muscles. It sometimes shows up after a hip injury or hip replacement surgery.
Our team checks for this sign during a Physiotherapy or Exercise Physiology assessment. It helps us work out which muscles need strengthening and which movements to focus on.
What is:
the Trendelenburg Test?
A Simple Clinical Assessment
The Trendelenburg test evaluates one thing: can the hip abductors on your standing leg hold the pelvis level? It is one of the most commonly used tests in Physiotherapy and takes less than two minutes.
- Stand facing the examiner with weight evenly distributed on both feet.
- Lift one foot off the ground by bending the knee, standing on one leg.
- The examiner observes the pelvis from behind for 30 seconds.
- Repeat on the other side.
Negative (normal): The pelvis stays level or rises slightly. The hip abductors are doing their job.
Positive: The pelvis drops on the non-standing side. The hip abductors on the standing leg are weak or not functioning properly.
A positive result confirms weakness exists but does not explain why. Further assessment is needed to identify the underlying cause.
StatPearls (NCBI) provides a detailed clinical guide to the Trendelenburg sign.
Physiotherapy:
Exercise Physiology:
Hydrotherapy:
Buoyancy reduces load through the hip joint. Strengthening with less pain.
At Optimum we have hydrotherapy pools at our Blacktown, Croydon Park, Campbelltown, and Mornington clinics.
Gait Retraining:
Balance Training:
Surgical Intervention:
How Trendelenburg Gait is Treated
Exercises for Trendelenburg Gait
Side-lying hip abduction: Lie on your side, legs straight. Slowly lift the top leg toward the ceiling and lower. Isolates the gluteus medius without weight-bearing load.
Clamshells: Lie on your side, hips and knees bent to 45 degrees. Keep feet together and open your top knee. A resistance band makes it harder.
Single-leg stance: Stand on one leg near a wall for balance. Hold 10 to 30 seconds. Focus on keeping your pelvis level.
Banded lateral walks: Resistance band around your ankles. Step sideways, keeping tension throughout. 10 to 15 steps each direction.
Step-ups with pelvic control: Step up onto a platform, focusing on a level pelvis as you rise.
Single-leg bridge: Lie on your back, knees bent. Lift one foot and push through the other to raise your hips.
These are starting points. A Physiotherapist will adjust the selection and progression based on your assessment.
Medicare Chronic Disease Management Plans
Your GP can refer you for up to 5 Medicare-rebated allied health sessions per calendar year under a Chronic Disease Management Plan. Ask your GP about a referral for Physiotherapy or Exercise Physiology.
NDIS Physiotherapy for Trendelenburg Gait
NDIS participants can access Physiotherapy and Exercise Physiology for Trendelenburg gait under Improved Daily Living or Improved Health and Wellbeing funding. Our team works with your support coordinator to make the process straightforward.
Frequently Asked Questions
What is Trendelenburg gait?
Trendelenburg gait is an abnormal walking pattern caused by weakness in the hip abductor muscles, particularly the gluteus medius. When these muscles cannot stabilise the pelvis during walking, the pelvis drops on the unsupported side with each step. Common causes include hip surgery, hip osteoarthritis, neurological conditions, and muscle disuse.
What does a positive Trendelenburg test mean?
A positive Trendelenburg test means that when you stand on one leg, the pelvis drops on the opposite side instead of staying level. This indicates that the hip abductor muscles on the standing leg are weak or not functioning properly. Further clinical assessment is needed to determine the cause.
Can Trendelenburg gait be corrected?
Many people with Trendelenburg gait respond well to targeted Physiotherapy. The primary treatment is hip abductor strengthening, including exercises like side-lying hip abduction, clamshells, single-leg stance, and banded lateral walks. Many people notice meaningful changes within 6 to 12 weeks of consistent exercise.
What is the best exercise for Trendelenburg gait?
Side-lying hip abduction is often the starting point because it isolates the gluteus medius without weight-bearing load. As strength improves, a Physiotherapist will typically progress to functional exercises like single-leg stance, banded lateral walks, and step-ups with pelvic control.
Is Trendelenburg gait serious?
Trendelenburg gait itself is a sign of hip abductor weakness, not a disease. Its seriousness depends on the underlying cause. Weakness from disuse or post-surgical recovery often responds well to Physiotherapy. If left unaddressed, compensatory movement patterns can lead to secondary problems in the lower back, knee, and ankle.
Think you or someone you care for may have a gait issue?
Our Physiotherapists and Exercise Physiologists can help. Make an enquiry or call 1800 678 647.
