Who gets it, and what usually lies behind itEmerging evidence
In a 1995 survey of 518 recreational riders, 36.1% reported groin and buttock complaints, behind only the neck and knees, and in men these went with more miles a week, fewer gears and fewer years of riding. At one cycling medicine clinic, the hip was among the three commonest areas of long-lasting discomfort.
The usual story is a change: more riding, more climbing or harder efforts, a new bike, saddle, cranks or shoes, lower bars or a time-trial position, or a return after a break. Across 18 studies, how much people ride was linked with overuse pain, while many bike-fit measurements weren't, and on a 6-day tour, inexperience and not training beforehand were risk factors. One sports medicine commentary describes riders with pain from inside the hip as having groin pain that builds gradually with more riding or a more bent position.
Hip pain in riders comes from the same tendons, muscles and joints as in anyone, and many riders also run, walk and sit at desks. The map above sends each cause to its own guide.
Sources 1, 2, 3, 4, 5
Why the bike changes how far your hip bendsEmerging evidence
The hip bends most at the top of the pedal stroke. On an upright exercise bike, the hip moved between about 32 and 70 degrees of bend through each turn in a 1988 lab study of 6 people, and saddle height and where the foot sat on the pedal changed it most. A lower saddle bent the hip more in 24 riders, and in 5 people with instrumented hip replacements it raised the force through the hip joint by about 15%. The drops bent the hip more than the tops in 18 riders, and tilting the pelvis forward bent it more in 55. Across 47 studies, moving the saddle forward or back changed the hip and trunk angles.
One sports medicine commentary suggests that a saddle set far back, long cranks, low bars and aero positions all bend the hip further at the top of the stroke. It puts the bend there at 65 to 90 degrees in riders without hip pain, and suggests keeping it at least 15 degrees short of the hip's own limit. These are one expert's suggestions: no study has tested them.
A higher saddle raised the activity of the outer hip (gluteus medius) and hamstring muscles in a 1985 lab study, which may be why fitters blame a rocking pelvis for outer hip pain. Force through the hip joint rose in line with power, and across the cadences tested it was lowest at about 60 turns of the pedals a minute, so a light gear at a cadence that feels smooth is our suggestion.
Our reading: for most riders, hip pain on the bike comes from doing more than the tissues are used to, with the position deciding where it bites. These are lab studies in small groups and expert opinion, not injury trials.
Sources 6, 7, 8, 9, 10, 11, 5, 12
Hip shape in riders: small studies, no proof that riding causes damageEmerging evidence
In 11 professional riders, 13 of 22 hips (59%) had a shallow socket (acetabular dysplasia), against 3 of 30 hips in people who didn't ride. In 16 riders having keyhole hip surgery (arthroscopy), cartilage damage on the ball of the hip was greater than in 167 matched non-riders. But in 185 people having arthroscopy, endurance sports such as cycling went with fewer injuries to the cartilage rim of the socket than pivoting sports like football or flexibility sports like dance.
These are small, selected groups. They don't show that riding causes hip damage, and we found no study showing that cycling causes impingement.
Sources 13, 14, 15
A rare cause not to miss: a narrowed artery in the pelvisEmerging evidence
In some endurance athletes, mostly high-level cyclists, the main artery to the leg inside the pelvis (usually the external iliac artery) thickens inside (endofibrosis) or kinks when the hip is bent in a low riding position. At very hard efforts the leg then can't get enough blood. It is rare: a 2025 review found 443 cases reported across 43 studies, mostly in men who were endurance cyclists.
The warning signs are pain, cramp, numbness or weakness, or a "dead" leg, in the thigh, buttock or calf that comes on only at hard efforts and eases quickly when you stop or back off, usually in the same leg each time. It is often missed because examination and tests at rest are usually normal. The diagnosis needs an exercise test on a bike with the ankle blood pressures measured straight afterwards, and an ultrasound or a magnetic resonance scan of the arteries with the hip bent as well as straight.
Cutting back the riding that brings it on is the first step, but there isn't enough evidence to say how well that works. In specialist series from a single centre, without a comparison group, most athletes had fewer symptoms after surgery to release a kinked artery (84% of 142) or to remove the thickened lining and patch the artery (91% of 68). Balloon stretching and stents relapsed more often, and a narrowed artery can also clot or tear. It needs a vascular specialist, not a stretch or a bike fit, and cramp or tired legs at hard efforts are far more often just fatigue.
Sources 16, 17, 18, 19, 20, 21, 22, 23, 24
Stress fractures, bone density and crashesEmerging evidence
Stress fractures of the hip (femoral neck) are about 3% of stress fractures in sport, mostly in long-distance runners. Groin pain with exercise is the usual symptom; an X-ray comes first and magnetic resonance imaging (MRI) next, and a delay makes it more likely the bone shifts. We found no published hip or pelvic stress fracture caused by riding alone, but reviews list stress fractures among cycling injuries, adult road cyclists often have low bone density in the lower spine, and many riders also run. So groin pain that builds with every ride or run gets a same-day check.
After crashes: in people under 80, cycling caused 4.5% of the hip fractures at one trauma unit over 6 years (average age 60). Cycling referrals for pelvic and hip-socket fractures rose 90% in a year at Ireland's national centre, and nearly half of those riders needed surgery. In three professional riders with broken pelvises, the plain X-rays showed no clear fracture, so a computed tomography (CT) scan was needed.
Sources 25, 26, 27, 28, 29, 30
When a scan helps, and what it can't tell youStrong evidence
Hip-related pain is diagnosed from symptoms, examination and imaging together, international agreements say; an X-ray of the pelvis and hip comes first, and MRI only when more detail is needed. Scans of hips without pain often show labral tears (54% in pooled studies) and impingement shapes (a cam shape in 37%, and 54.8% of athletes), so a scan report has to match the story.
A possible stress fracture needs an X-ray, then MRI if the X-ray is normal. A possible artery problem needs the exercise test and scans with the hip bent. After a crash, an X-ray comes first, and a CT scan may be needed if the pain doesn't fit a normal X-ray.
Sources 31, 32, 33, 34, 25, 16, 20
How it usually goesEmerging evidence
No study has followed riders' hip pain, and no one can promise a date. For outer hip tendon pain, 51 of 65 people who had education and exercise rated themselves a success at a year, and about half of those who waited and saw had also improved. For hip-related pain, an international consensus asks for at least 3 months of exercise-based care. In one series without a comparison group, riders who had keyhole surgery for impingement were back on the bike at an average of 4.5 months.
Sources 35, 36, 37
