Most people with heel pain have been told to stretch. Far fewer have been told to load.
That’s a meaningful gap, because the most-cited trial in this area compared exactly those two approaches — and the loading group got better considerably faster.
This article walks through what that program actually involves: the technique, the dosage, the progression, how to know whether you’re doing too much, and the mistakes that cause it to fail. It’s the level of detail most articles skip.
One thing first. This assumes plantar fasciopathy has been confirmed. Heel pain has several other causes — a stress injury to the heel bone, nerve involvement, and inflammatory conditions among them — and some of those get worse with loading. If nobody has examined your foot, that’s the first step, not this.
Why Loading Rather Than Stretching
The label “plantar fasciitis” implies inflammation. When the tissue has been examined in persistent cases, what’s found is more degenerative than inflammatory — disorganized collagen and a tissue that has lost its capacity to tolerate the demands placed on it. Many clinicians now use plantar fasciopathy or simply plantar heel pain.
That reframing changes the target. You’re not calming an angry structure. You’re rebuilding a tissue’s load tolerance, and connective tissue rebuilds tolerance through progressive mechanical loading.
The Trial Worth Knowing
Rathleff and colleagues randomized 48 patients with ultrasound-confirmed plantar fasciitis. Both groups received a short information sheet and gel heel inserts. One group did the standard plantar-fascia-specific stretch. The other did high-load progressive strength training.
At three months, the strength group scored 29 points lower on the Foot Function Index — a difference well beyond what’s considered clinically meaningful.
The honest part: at 6 and 12 months there was no significant difference between groups. Both improved.
So the accurate claim isn’t that loading cures and stretching doesn’t. It’s that loading gets you there faster — and when you’re four months into limping to the bathroom each morning, several months of your life is not a trivial difference.
The Exercise
Setup: Stand on a step, ball of the foot on the edge, heel free to drop below.
The critical detail: Place a rolled towel under your toes, thick enough that at the top of the movement your toes are bent upward as far as they will go. This isn’t decorative. Lifting the toes tensions the plantar fascia through what’s called the windlass mechanism, so the calf raise loads the fascia rather than only the calf. Without the towel, you’re doing a calf exercise.
The movement: Single leg where possible. Rise up over about three seconds. Hold at the top for about two seconds. Lower over about three seconds. Slow throughout — rushing both reduces the loading effect and tends to provoke symptoms.
Frequency: Every second day. Not daily. The rest day is where adaptation happens.
Duration: Three months minimum.
The Progression
This is where most self-directed attempts fall apart, because people do the same three sets for twelve weeks and wonder why nothing changed. The load has to increase.
Weeks 1–2: Three sets, at a weight where about 12 repetitions is your limit. For most people starting out, body weight on one leg is enough.
Weeks 3–4: Add load — the trial participants used a backpack filled with books. Drop to around 10 repetitions and increase to four sets.
Week 5 onward: Around 8 repetitions, five sets, continuing to add weight as you get stronger.
The pattern is fewer repetitions, heavier load, more sets. Repetition maximum means genuinely near your limit for that set — if you could comfortably do fifteen when the target is eight, the weight is too light.
If you can’t do a single-leg raise at first: Start with both legs, still with the towel, and progress to single leg as you’re able. That’s a normal starting point.
The Pain Rules
The most common question is whether it should hurt. A useful framework:
During the exercise: Some discomfort is acceptable — broadly, tolerable and under about 5 out of 10. Sharp pain, or pain that changes how you move, means stop.
Immediately after: A modest increase is fine, provided it settles reasonably quickly.
The next morning: This is the real test, and it’s a good one because morning pain is the defining feature of this condition. If your first steps are the same as usual, the load was right. If they’re clearly worse than the previous day, the load was too much — reduce it and rebuild more gradually.
That single check replaces guesswork with feedback, and it’s worth applying at every progression.
Why Programs Fail
The towel gets skipped. Without dorsiflexed toes you’re loading the calf and not the fascia. It’s the single most important technical detail.
The load never increases. Progressive means progressive. Twelve weeks of the same three sets is twelve weeks of maintenance.
It’s done daily. More frequent is not better here. Every second day is the protocol.
It’s rushed. Fast repetitions reduce time under tension and tend to aggravate symptoms.
It’s stopped at week five. Symptoms often ease noticeably around the first month, well before load tolerance has actually been rebuilt. Stopping there is the most common route back to square one.
Nothing else changed. Loading raises the ceiling. If daily demand stays higher than the new ceiling, you won’t get ahead of it.
The Other Half: Reducing Demand
Alongside the program:
Identify what changed. Most cases trace to something in the preceding weeks — more standing at work, a new fitness routine, a vacation with heavy walking, a switch to flatter shoes, or weight change.
Reduce barefoot time on hard floors while symptoms are irritable. Supportive footwear indoors is often the single most effective environmental change.
Break up prolonged standing rather than doing it in long blocks.
Modify rather than stop exercise. Reduce impact volume, shift some to cycling or swimming, keep moving.
Address ankle range. Limited ankle dorsiflexion is consistently associated with plantar heel pain, and calf flexibility work often belongs alongside the strengthening.
Realistic Expectations
Three months minimum, and some cases take longer. Symptoms often improve well before the tissue’s capacity has been rebuilt.
Progress is not linear. Good weeks, flat weeks, and occasional flares. A setback in week seven doesn’t erase the previous six.
The morning symptom usually improves last. First-step pain is often the most persistent feature, and its gradual reduction — fewer painful steps, less intensity — is a better progress marker than whether it’s gone entirely.
When Loading Isn’t the Answer
Get assessed rather than starting a program if you have: sharp, pinpoint pain on the heel bone that worsens the further you walk, particularly after an increase in activity; burning, tingling, or numbness in the heel or arch; pain at the back of the heel rather than underneath; sudden onset after a distinct pop or inability to bear weight; or heel pain with prolonged morning stiffness alongside back pain, other joint symptoms, or psoriasis.
That last one matters — inflammatory conditions commonly cause pain where tendons attach to bone, and the heel is a frequent site.
Get the Diagnosis Right, Then Load It
A program is only as good as the diagnosis it’s built on, and the progression usually needs adjusting to the individual.
Highland Physical Therapy offers a free discovery visit at no cost and no obligation. You’ll get a proper examination of your foot, ankle range, and calf strength, confirmation of what you’re actually dealing with, and a loading program set at the right starting point with a plan for progressing it.
If your presentation suggests something other than plantar fasciopathy, we’ll tell you plainly.
