Proximal Hamstring Tendinopathy: A Runner's Guide to Sit-Bone Pain

Educational information only — this is not medical advice, and it does not diagnose anything. If pain is severe, shooting, or not improving, get it checked by a clinician.

It doesn't feel like a normal hamstring problem. There's no tear, no dramatic moment. Instead there's a deep ache right under one glute — at the sit bone — that shows up on hills, during speedwork, and, strangely, after a long drive or a day at a desk. Runners often stretch it for months and wonder why it never quite leaves. That pattern has a name: proximal hamstring tendinopathy, an overload problem where the hamstring tendons attach to the pelvis.

Why this tendon gets overloaded

Your hamstrings attach at the ischial tuberosity — the sit bone you feel when you sit on a hard chair. Every stride, that tendon works twice: it helps extend your hip as you push off, and it brakes your swinging leg before footstrike. Two things multiply its load. The first is hip flexion under load: hills, speedwork, and long strides bend the hip while the tendon is pulling hard, and the tendon also gets pressed against the bone in that position. The second is a sudden jump in exactly those sessions — a new hill workout, a track block, or a big mileage week after a quiet one.

Sitting matters too. A hard chair, a low car seat, or a long flight presses directly on the irritated attachment. That's why this niggle often hurts as much at a desk as it does on a run — and why "I rested for two weeks" sometimes fails: the running stopped, but the compression didn't.

The counterintuitive rule: stop stretching it

The classic hamstring stretch — toe touches, hurdler stretches, aggressive forward folds in yoga — pulls the tendon and compresses it against the sit bone at the same time. For an irritated tendon, that's the exact combination it hates. Most runners with this problem have been stretching the one tissue that needed less stretch and more strength. Park the deep hamstring stretches for now. Gentle mobility is fine; end-range pulling is not.

What to do this week

• Modify, don't automatically stop. Flat, easy running often stays on the table. Cut speedwork and hills for two to three weeks, shorten your stride slightly, and keep pain at 3 out of 10 or below during the run.
• Use the 24-hour rule. Judge each run the next morning. No worse than baseline by tomorrow means the dose was acceptable. A clear flare that lingers into the next day means the dose was too big — repeat or reduce, don't progress.
• Change your sitting. Use a cushion, raise the seat if you can, and stand or walk for a few minutes every 30–45 minutes on desk days and long drives.
• Start isometrics. A bridge hold — lying on your back, knees bent, hips lifted, 5 holds of 30–45 seconds, once or twice a day — loads the tendon without the deep hip bend. Many runners find it settles pain within days.

The strength progression that actually fixes it

Tendons remodel when you load them progressively, not when you rest them forever. A simple three-stage path, two to three sessions a week:

1. Stage 1 — Isometrics (weeks 1–2). Bridge holds as above, plus standing hamstring curl holds against light resistance. Goal: calm pain, keep the tendon working.
2. Stage 2 — Slow heavy strength (weeks 2–6). Romanian deadlifts with a modest hip hinge — stop well short of a deep stretch position — and slow single-leg bridges. Three sets of 8, slow down and slow up, adding weight gradually. Slight discomfort up to 3–4 out of 10 during the set is acceptable if the next morning is no worse.
3. Stage 3 — Energy storage (week 6+). Once slow strength feels solid, add faster work in small doses: gentle hill strides on a shallow grade before full hill repeats, then speedwork at reduced volume. One new stress at a time, judged by the next morning.

Expect an 8–12 week arc, not a two-week cure. Tendon tissue changes slowly, and the runners who do best treat the strength work as the treatment and the running as the thing it protects.

Red flags — see a clinician instead

• Sudden sharp pain or a tearing sensation during a sprint or stride — that suggests a tear, not tendinopathy.
• Pain that shoots down the back of the leg, or any numbness, tingling, or weakness — nerves need ruling out.
• Bruising high on the back of the thigh.
• Pain from a fall or direct blow to the sit bone.
• No steady improvement after six weeks of sensible loading and modified running.

The bottom line

Sit-bone pain in runners is usually an overloaded tendon, not a tight muscle. Stretch less, sit smarter, keep flat easy miles if the 24-hour rule allows them, and rebuild the tendon with progressive strength over 8–12 weeks. The ache under your glute isn't a life sentence — it's a load problem, and load problems have load solutions.

Medical disclaimer: This article is for educational purposes only and is not medical advice. It does not diagnose any condition, and it does not replace evaluation or treatment by a qualified clinician. If in doubt, get checked before you run.