Differentiating Buttock Pain - Gluteal Tendinopathy

Original Editors - Mariam Hashem

Top Contributors - Mariam Hashem, Kim Jackson, Tarina van der Stockt, Lucinda hampton and Ewa Jaraczewska 

Introduction

Deep Gluteal pain is a complex condition that could be the manifestation of different soft tissue pathologies. Due to the complexity of the anatomy the symptoms are overlapping. Scans such as MRI and ultrasound don't rule out the irritating source of pain and the special tests often don't discriminate the underlying structures that contribute to the symptoms.

Gluteal Tendinopathy is a potential source of deep gluteal pain. The condition has been introduced as a concept very recently in the research compared to other structures that can cause gluteal pain such as Sacroiliac Joint and the Lumbar region.

Gluteal Tendinopathy

Previously known as Greater Trochanteric Pain Syndrome is a pain that starts in the greater trochanter region and may radiate to the lateral thigh and/or leg. Trochanteric Pain primarily is caused by the gluteal tendons and a secondary cause of this pain is the bursal inflammation that used to be thought as the main source of pain. Other structures that could be involved int he pathology are the posterior hip capsule, Gemelli's and the Obturators.

Inferior Gemellus	Obturator Internus	Obturator Externus

This condition has significant impacts on sleep quality, physical activity, work participation and the quality of life similar to patients waiting for hip replacement for severe hip osteoarthritis., The pain of Gluteal Tendon origin can refer to the sacroiliac region, the buttock, the groin and into the anterior thigh. This overlap of referral pattern doesn't help in differentiating other pathologies.

Gluteal Tendinopathy is more relevant in females over 40 years old and believed to be present in 23.5% of women who are at risk of knee osteoarthritis . A percentage of 73 of the patients are believed to be either menopausal or peri-menopausal indicating a link between hormonal changes and tendinopathy. Certain medications are also shown to influence the tendon structural changes such as quinolone antibiotics, oestrogen inhibitors such as Tamoxifen for patients who had breast cancer.

Other factors that were found to affect the presence and prognosis of Tendinopathy are:

• Smoking
• Diabetes
• Steriods
• Changes in load either underload or overload.

Factors such as greater psychological stress, poorer quality of life, greater waist girth and a higher BMI were relevant in sever cases. However, these factors might also develop as a result of pain.

Risk factors are:

• Female gender
• Older age
• Higher BMI
• Back pain
• Lower femoral neck angle

Diagnosis

There are important measures in diagnosing Gluteal Tendinopathy:

• Patient's history such as gender, BMI, age and history of loading
• Pain location: lateral hip pain.
• Pain severity: usually 4/10 on most days
• Palpation: tenderness over the superior aspect of the greater trochanter (the insertional point of glute medius and glute minimus)
• FADER or FADER resisted tests ( flexion adduction external rotation position). Pain over the lateral hip region is a positive test and could be diagnostic of gluteal tendinopathy. If the pain was reported in the deep gluteal region it could indicate deep gluteal pain syndrome. When the leg is flexion> 60 degrees, adduction, external rotation, the Piriformis becomes an internal rotator. Also, glute med and glute max swap roles from being an external rotator to being an internal rotator.
• A common sign is a reported difficulty in walking after sitting for a period of time often described as'' hobbling''.

To rule out osteoarthritis of the hip, the subjective history of the patient and FADIR ( flexion adduction internal rotation test) are used. A positive FADIR test might not rule out OA completely but a negative test is recognised to rule out intra-articular hip pathologies such as OA, Femoral Acetabular Impingement or Labral tear. Also, in hip Osteoarthritis hip flexion ROM tends to be reduced.

Hip External Rotator; Gemelli's, Obturators and Quadratus femori have been included in Lateral hip pain pathology. They are positioned at 90 degrees to the long axis of the hip and serve important functions:

• Compress the hip joint and to provide stability at the joint.
• Reinforce the posterior capsule of the hip

Management of Gluteal Tendinopathy

Patient education is considered the most important part of management. Education includes the patient in the management and puts them in control with their treatment plan. Managing associated or provoking factors such as hormonal changes, co-morbidities, sleep, smoking and medications should be explained and discussed with the patient. Although some of these factors might not be modifiable however patients should be aware of them.

Promotion of healthy lifestyle changes such as quitting smoking and weight loss is integral in the management of Tendinopathy.

Load management is used in the management of tendinopathy by gently increasing the load on the tendon and managing the ''weekend-warrior exercise'' or load and no-load scenario.

People with Gluteal Tendinopathy are shown to have excessive hip adduction. Therefore, adduction or leg movement across the mid-line should be avoided. This can be achieved by avoiding:

• Stretches should be avoided especially Tensor Fascia Lata muscle to avoid the compression/pressure on the Gluteus medius and minimus tendons
• Crossing the legs especially with the affected leg on top of the non-affected
• Standing or hanging on one leg
• Lying on the affected side or non-affected without a firm pillow in between the legs
• Dynamic valgus (hip adduction and internal rotation) during loading activities as it increases compression and tensile loading on the damaged tendon.

The Visa G questionnaire was validated by Fearon et al as an outcome measure for disability resulting from lateral hip pain. The questionnaire looks at activities such as lying on the affected side, stairs negotiation and the overall severity of the hip pain.

Selection of Exercises

Principals

• Hip abductor strength is not associated with the severity of the Gluteal tendinopathy
• Compression forces can aggravate the lateral hip pain. An exercise such as Clam can provoke the tendon pain due to the high compressive force
• Hip flexion should be avoided as it can negatively affect motor control and optimal muscle activation when Tensor Facia Lata and superficial hip flexors dominate over hip abductors and external rotators
• Exercises should be progressive meaning that load should be increased gradually. The load can be managed by adjusting frequency, repetitions, resistance.
• It is recommended to start the rehabilitation with isometric exercises as it proved to have an analgesic effect on tendon pain and can be used as an entry into rehabilitation and as 'in-season' for athletes to reduce pain and control symptoms
• Loading should be monitored by observing the pain level following the exercises. A 4/10 pain during the exercise and no worse over 24 hours is ideal.
• Build up the resistance to 4/10 intensity. Hold for 30 seconds. repeat 5 times daily.
• Advice the patients to perform the exercises slowly to stimulate the deep stability system of the muscle.
• Rio et al recommended the use of external motor control cues such as visual (mirror, video and pressure feedback) auditory (exercise metronome) and mental (mental rehearsing of the task) to stimulate neuroplastic changes
• No pain should be allowed during functional tasks such as lunges, step-ups as it reflects the poor control of optimal alignment and increased compression on the Gluteal Tendon
• Encourage exercises from a neutral lumbar spine.
• An exercise that flares up the patient's symptoms shouldn't necessarily be avoided. Either return to this exercise later in the rehab stages or reduce the load and monitor the symptoms

Recommended Exercise Programme:

Week/Stage	Exercise Type	Examples	Load
Week 1 Early	Isometric Abduction Isometric Extension	In standing or Lying, against the wall, bridging with resisted abduction In standing or Lying, against the wall, supine into a ball	Low effort. Build up resistance slowly to a 4/10 pain max. 30-45 sec hold. 5-8 reps. 1-2 sets throughout the day.
Week 2	Isotonic:side-lying against gravity Standing Abduction/External Rotation Motor Control	Modified clam using an elastic band to increase resistance Bilateral. Starting with light resistance Glute Max over the bed	Moderate effort. 8-12 reps. 2 sets once daily Light effort to activate Glutes Max before hamstrings or back extensor with 10 seconds holds
Week 3	Neuroplastic Training Bridge Loading	Fire Hydrant-progress to doing the exercise with resistance Off-set Bridge, Single-Leg Bridge, Hip Drop Bridge	High load. 6-8 reps. 1 set.Once Daily 10 reps. 1-3 sets
Week 4-6	Increase loading to incorporate functional high loading with heavy slow resistance	Abduction slides Proprioception functional loading The Bird Dog Lateral Step Down	Progressive. Increase resistance.8-12 Reps, 3 sets. 3-4 times weekly. Stop modified clam and optimal Glute Max
Week 6-12 Late Rehab	Increase loading. Sports specific exercises	Single-Leg squat Backward Lunges on ball Contralateral split squat Step-up	Increase weight-slow and heavy resistance. reduce reps as you increase the weight. 8-12 reps. 3 sets. 3-4 times weekly

Static Hip Extension	Resisted Hip Abduction	Abduction Slides
Single Leg Squat	Split Squat	Sidelying Abduction
Bridge with static hip abduction	Modified Clam	Optimal glute maximal firing
Pelvic drop and lift from bridge	Resisted Bird-dog	Static Hip Abduction