Two winters ago I ignored a small ache under my right sit bone for six weeks. I was deep in an ultra block, mileage was climbing, and I told myself it was just tightness from the cold seat of my car on the drive to orienteering events. By the time I stopped ignoring it, I could not sit through a two-hour meeting without shifting side to side. I could not drive to Sofia without a folded towel under one glute. Downhill running lit it up like a lightbulb.
That was proximal hamstring tendinopathy — PHT — and it took me the better part of five months to run consistently again. Not because the pathology is mysterious. It is not. Because the return-to-running phase is where most runners either rush and re-flare, or freeze and never restart. This is the framework I used on myself, and the one I coach my callanetics students and running friends through when the sit-bone pain shows up. And yes, at the end, I will share the recovery gear that made the boring, unglamorous rebuild weeks actually stick.
What proximal hamstring tendinopathy actually is (and why it is not a "pulled hammy")
The proximal hamstring tendon attaches to the ischial tuberosity — the sit bone. Tendinopathy is a load-management problem, not a tear. The tissue has been asked to do more than it can currently tolerate, over and over, and it has responded by becoming irritable, thickened, and painful under specific loads.
The tells are specific:
- Deep, localized pain right at or just below the sit bone
- Worse with sitting, especially on hard surfaces or in cars
- Worse with running, most notably at faster paces, uphill, or during long efforts
- Often quiet during walking on flat ground
- Stretching the hamstring (bending forward to touch toes, pigeon pose, seated forward folds) usually makes it grumpier, not better
This last point is the one that trips people up. Almost everyone's instinct with a "tight hamstring" is to stretch it. With PHT, aggressive stretching compresses the tendon against the sit bone and feeds the irritation. I wrote more about the earlier diagnostic and staging pieces in The Sit-Bone Pain Nobody Talks About — if you are earlier in the process, start there and come back to this one.
For today, I want to assume you already have the diagnosis, you have done some early isometric work, and you are wondering: how do I actually run again without lighting this thing back up?
The two tests I use before adding any running
I do not put a runner back on the trail based on a calendar. I use two functional gates.
Gate 1: The sitting tolerance test
Sit on a firm chair or bench — not a couch — for 30 minutes. Not on a cushion. Not sideways. Sit like a normal human.
- If your sit-bone pain stays below a 3/10 during and does not spike in the hours afterward, that is a green light on this gate.
- If it climbs to 4 or above, or wakes up angry the next morning, you are not ready. Keep loading, do not run yet.
Sitting is the sneakiest provocation with PHT because it compresses the tendon against the bone. If you cannot tolerate sitting, you cannot tolerate the hip flexion required for running.
Gate 2: The isometric hamstring bridge test
Lie on your back, heels on a low step or chair, knees bent about 20 degrees. Lift into a single-leg bridge on the affected side and hold for 45 seconds. Rest. Repeat five times.
- Green light: pain stays 3/10 or below during, and settles to baseline within 24 hours.
- Red light: pain climbs mid-hold or lingers into the next day.
If both gates are green, you have earned the right to start the return-to-run protocol. Not before.
The loading ladder that gets you back
Before we talk running, the tendon has to be strong. This is the part where impatient runners cut corners and pay for it. My progression, roughly two to three weeks per stage depending on symptoms:
Stage 1: Isometrics (weeks 1–3)
Long-hold hamstring bridges. 5 sets of 45 seconds, every other day. Progress from double-leg to single-leg when the double-leg version is easy. Add load (dumbbell on hips) only when body weight feels too easy.
Stage 2: Isotonic — knee-dominant
Hamstring curls (sliders on the floor, Swiss ball, or machine). 3 sets of 10, slow tempo — 3 seconds down, 3 seconds up. Every other day.
Stage 3: Hinge pattern loading
This is where I see runners either succeed or stall. Romanian deadlifts, single-leg RDLs, kettlebell hinges. Start with a very short range — maybe your hands only reach mid-shin — and progressively increase depth as tolerance builds. The rule: the sit bone should feel worked, not pinched.
Twice a week. 3 sets of 8 with real load. Not pink dumbbells. Get to a weight that feels like a genuine 7/10 effort by the last rep.
Stage 4: Speed and elastic loading
Only once heavy slow work is pain-free do you add sprint-adjacent work — A-skips, fast marches, eventually short strides on flat ground. This is the bridge to running.
The return-to-run protocol itself
Here is the exact structure I used on myself and now use with the runners I coach. It is deliberately slower than most online plans because PHT punishes optimism.
Phase A: Hill walking (1–2 weeks)
Yes, walking. Uphill walking loads the hamstring in a friendly range without the impact and hip flexion of running. 30–40 minute walks on rolling hills, three to four times per week. Downhills should be gentle — steep descents are provocative because of the eccentric load and the deep hip flexion angle at foot strike.
Phase B: Incline treadmill running or gentle uphill jog (2–3 weeks)
I know, treadmills are boring. But a 6–8% incline reduces the hip flexion angle at foot strike, which means less compression of the tendon against the sit bone. Start with 1 minute jog / 2 minutes walk, repeated 8 times. Progress by adding 30 seconds to the jog interval every second session, provided the pain rules are respected.
Phase C: Flat, easy-pace running (3–6 weeks)
Only once you can complete 25 minutes of continuous incline running pain-free do you graduate to flat. And on flat, you are running slow. Zone 2, conversational, no strides, no hills, no downhills. Progress volume before intensity — always.
Phase D: Reintroducing terrain and pace
This is a month-long process minimum. Add one variable at a time. A short downhill segment one week. A few gentle strides the next. A tempo effort three weeks after that. Never add downhill running and speed in the same session.
The pain rules — write these on your fridge
These are non-negotiable for me and for anyone I coach:
If any of these three rules is broken, you drop back one phase for a week. No arguing with the tendon. The tendon always wins.
For the wider mindset around restarts, I keep coming back to what I wrote in Restarting Training After a Setback. The framework there applies here almost word-for-word.
How HYKLE products fit into the rebuild weeks
The rehab work is unglamorous. Bridges, hinges, boring incline running, ice packs, sitting on firm chairs. What kept me consistent through those months was not motivation. It was the small daily rituals that made my legs feel taken care of after every session — because when your legs feel good, you show up for the next session.
Here is what actually lives in my kit during a PHT rebuild:
HYKLE Compression Socks — I put these on after every rehab session and every incline run. During the rebuild, I was often doing "double days" — a strength session in the morning and a walk or short incline jog in the evening. Graduated compression from ankle to calf helps the venous return from the lower leg, which means less pooling, less heaviness, and I could go into the second session without feeling like my legs were made of concrete. Greg from Frisco described it best in his review: "you can feel the difference the minute you put them on." That is exactly how I feel about them on a double-day.
HYKLE Ankle Compression Socks — On lighter days, or when I was just doing hinge work in the gym, I wanted the arch and ankle support without the calf sleeve. These are what I wear teaching my callanetics classes now. Small thing, but the arch support matters when you are on your feet coaching for two hours after a morning strength session.
HYKLE Infinity Knee Brace — This one might surprise you in a hamstring article, but hear me out. During my rebuild, I was doing a lot of single-leg RDLs and step-downs, and my right knee (the same side as the affected hamstring) was working overtime as a stabilizer. The compression from the Infinity brace during heavier hinge sessions gave me proprioceptive feedback and reduced the mid-workout ache I would otherwise get in the knee. I do not wear it every session — just the heavy load days.
HYKLE Sciatica & Lower Back Support Brace — PHT often travels with a cranky lumbopelvic region. If you have been guarding one side for weeks, your low back knows about it. On long drives to orienteering events during my rebuild, I wore this. It kept the pelvis neutral, kept the sit bone from being pressed unevenly into the seat, and I arrived at the start line without a flare. Paulette from Trumbull wrote that she "can walk 2 miles now pain-free" wearing hers — I would say the same about my three-hour drives to trail races.
HYKLE Impact Pro insoles — I put these in my daily walking shoes during the phase where I was doing 40-minute hill walks. Even weight distribution matters when you are asking one side of the body to slowly reintegrate load. And when you spend more time on your feet coaching group classes instead of running, the arch support keeps the whole chain from complaining.
None of these are shortcuts. They are not going to heal a tendon. Loading heals a tendon. But they are the tools that made the boring, patient work sustainable for me. They are the reason I kept showing up for six-week blocks of "not really running" without losing my mind.
Practical implementation: a sample rebuild week
Here is what a middle-of-rebuild week actually looked like for me, roughly week 8 of the return-to-run process:
- Monday — Strength: single-leg RDLs 3x8, hamstring curls 3x10, glute bridges heavy 3x8. Compression on afterward for 2 hours.
- Tuesday — 40 minute hill walk, easy. Ankle compression socks. Sit-bone check at bedtime.
- Wednesday — Incline run: 5 min jog / 1 min walk × 6, on 7% incline. Full compression socks afterward, legs up the wall for 10 minutes.
- Thursday — Off, or gentle mobility. Teach callanetics.
- Friday — Strength repeat, slightly heavier than Monday if Monday was pain-free.
- Saturday — 30 minute incline run, continuous. Then coffee with Deso and the boys, sit on a firm chair, monitor.
- Sunday — 60-minute hike with the family, gentle terrain. Recovery focus.
Notice: no back-to-back running days. Notice: strength sessions are the anchor, not the runs. Notice: I still tested my sit bone every single morning by pressing my thumb into it — if it was tender to touch, that told me I had done too much the day before, regardless of how the run had felt.
The long view
I ran an ultra ten months after my worst PHT week. Not a fast one. But a full one, uphill and downhill, without the sit bone complaining. What got me there was not a magic exercise. It was patience, honest pain rules, a proper loading progression, and the small daily rituals that made me feel like I was still an athlete during the months when I was mostly walking.
If you are staring down PHT right now, know this: it is one of the more forgiving tendinopathies once you stop feeding it the wrong loads. The tendon is not damaged in a way that cannot be rebuilt. It is a tissue that needs a smarter conversation with load.
If you want the recovery kit that made my rebuild weeks feel less like punishment, the HYKLE Compression Socks are where I would start — they are the single item I used most consistently through the whole comeback. HYKLE offers a 90-day test period on everything, so you can actually train in them before deciding. Whether you go with HYKLE or something else, put the recovery rituals in place before you need them. The rebuild is long enough without doing it in socks that do not support the work you are asking your legs to do.