Lateral Hip Pain & Gluteal Tendinopathy

Greater Trochanteric Pain Syndrome (GTPS), previously called "trochanteric bursitis," is primarily a gluteal tendinopathy affecting the gluteus medius and minimus tendons at their insertion on the greater trochanter. For years, this condition was called "trochanteric bursitis," and the presumed treatment was rest, ice, and anti-inflammatory injections. Research has shifted this understanding: the primary issue is frequently not an inflamed bursa but a distressed gluteus medius or minimus tendon - a gluteal tendinopathy. The bursa can become secondarily irritated, but it's rarely the main driver. This changes everything. Treating a tendinopathy is not about rest; it's about managing load and progressively strengthening the tendon. The idea that you just need to "rest it" is perhaps the most unhelpful advice for this condition.

The condition involves a load-capacity imbalance where compressive forces (from positions that bring the IT band across the trochanter) and tensile loads exceed the tendon's ability to adapt. Postures that bring your thigh across the midline of your body can cause the iliotibial (IT) band to compress the gluteal tendons against the hip bone, a key source of irritation in GTPS.

Weakness in the gluteus medius and minimus doesn't just cause local pain; it degrades movement quality throughout the kinetic chain. When these muscles aren't doing their job of stabilizing the pelvis, you can develop a "hip drop" or Trendelenburg gait pattern. This leads to compensations everywhere: the tensor fascia latae (TFL) and IT band may become overworked and tight, the low back can be subjected to shearing forces, and the knee can collapse inwards (valgus), potentially contributing to patellofemoral pain.

Chronic tendon pain is frustrating because the pain is often worse with rest (like at night), creating a cycle of anxiety and poor sleep. Poor sleep, in turn, is known to increase pain sensitivity.

The gluteus medius muscle functions as your hip's primary dynamic stabilizer during single-leg weight-bearing activities. During the stance phase of walking, your gluteus medius must generate enough force to prevent your pelvis from dropping toward the opposite side - a mechanical challenge that becomes more demanding as you walk faster, climb hills, or navigate uneven terrain. Research using instrumented implants shows the hip experiences approximately 238% of body weight during normal walking, with these forces concentrated at the greater trochanter insertion site where the gluteus medius and minimus tendons attach.

In GTPS, the primary mechanical problem involves compression of the gluteal tendons against the greater trochanter. This compression occurs most significantly when your hip moves into adduction - bringing your thigh across your body's midline. Common culprits include standing with weight shifted predominantly to one side ("hanging on one hip"), crossing your legs while sitting, and particularly during side-lying sleep where the top leg falls forward across the midline. Hip adduction positions substantially increase compressive loads on the gluteal tendons compared to neutral alignment.

The iliotibial (IT) band plays a crucial mechanical role in GTPS. When your hip adducts, the IT band moves posteriorly and compresses the gluteal tendons against the greater trochanter like a bowstring. This compression mechanism explains why activities involving repetitive hip adduction - such as running on banked surfaces, stairs, or prolonged standing on one leg - frequently trigger or worsen symptoms. Studies using dynamic ultrasound imaging show visible tendon compression under the IT band during hip adduction movements in symptomatic patients.

Single-leg loading amplifies these forces dramatically. When you stand on one leg, your gluteus medius must contract forcefully to prevent the opposite side of your pelvis from dropping - generating tensile loads through the tendon while simultaneously experiencing compressive forces from the IT band. This explains why activities like climbing stairs, running, or standing on one leg to put on shoes frequently reproduce pain. Research indicates that weakness of the hip abductors increases this challenge, creating a vicious cycle: the weaker the muscle, the greater the compensatory strategies, the higher the abnormal loads on the tendon.

Body weight distribution significantly influences GTPS risk. Higher body mass index correlates with increased gluteal tendinopathy prevalence, likely due to the simple physics of greater loads requiring greater muscle forces to stabilize the pelvis during gait. Studies show that for every additional kilogram of body weight, your gluteus medius must generate proportionally more force during walking to prevent pelvic drop.

Sleep positioning creates sustained compression that explains the characteristic night pain in GTPS. When lying on the affected side, direct pressure compresses the tendon against the trochanter. When lying on the opposite side, if the top leg falls forward into hip adduction and internal rotation, the IT band tightens and compresses the gluteal tendons. This sustained compression during the hours you should be resting prevents tissue recovery and explains why GTPS patients often report that night pain is their most debilitating symptom.