Prevention for Runners

Last updated: · FIVOR

Plantar heel pain is one of the more common running injuries, and one of the more frustrating: it takes months to resolve, it is worst first thing in the morning, and it usually arrives without any single moment you can point to.

There is almost always a cause, though. It just happened three to six weeks before the symptoms did.

It follows a change, not a volume

This is the pattern worth internalising.

People assume high mileage causes it. Plenty of high-mileage runners never develop it, and plenty of modest-mileage runners do. What separates them is usually a change:

  • A mileage jump — a new block, a race build, or a good week that became four
  • New shoes, especially with a different heel-to-toe drop
  • More hill work, which demands more ankle dorsiflexion and more forceful push-off
  • A surface change — track to road, trail to pavement, treadmill to outdoors
  • Faster running, which loads the fascia harder at every toe-off
  • A return after a break, where fitness comes back faster than tissue tolerance

Connective tissue adapts to demand, but it remodels over weeks to months — much slower than your cardiovascular system, and much slower than your enthusiasm.

Your heart is ready before your fascia is. That gap is where this injury lives.

The mechanism, briefly

The plantar fascia runs from the heel to the base of the toes. When the toes bend upward at push-off, it is drawn tight around the toe joints, raising the arch and stiffening the foot into a rigid lever — the windlass mechanism described by Hicks in 1954.

Which means the fascia is under maximum tension at the end of every stride, not at footstrike. Faster running and uphill running both increase push-off force, so both increase that peak tension.

The five habits

1. Increase gradually. Around 10% a week is the conventional guide. More usefully: hold each level for a week before climbing, and change only one variable at a time. Adding distance and hills and speed in the same week is three load changes stacked.

2. Rotate shoes. Midsole foam compresses under load and needs a day or more to recover. Two pairs alternated outlast and outperform one pair worn every run — and different pairs load your foot slightly differently, which spreads the stress.

Replace before they look finished. Cushioning dies long before the upper does.

3. Keep your ankle range adequate. This is the highest-value item and the one runners most often skip.

In the Riddle (2003) matched case-control study, restricted ankle dorsiflexion showed the strongest association with plantar heel pain — ahead of body weight and hours on your feet. Runners are commonly tight here, and limited dorsiflexion produces early heel lift, which means more time on the forefoot with the fascia under tension.

Knee-to-wall test: heel flat, knee to the wall, slide the foot back to the furthest point where the knee still reaches. Roughly 10 cm or more is generally adequate; under about 5 cm suggests real restriction. Compare sides.

If short, stretch both calf muscles daily — knee straight for the gastrocnemius, knee bent for the soleus. Two minutes.

4. Do calf and foot strength work. Slow heel raises, progressing to single leg. This is the same movement as the treatment protocol, done before you need it. The evidence here is stronger as treatment than as proven prevention — but stronger tissue tolerating more load is a reasonable bet.

5. Change drop slowly. Heel-to-toe drop is the variable your calf notices most. Moving to a lower drop is fine; doing it over a weekend is not. Weeks to months.

Recovery habits that are worth the time

Post-run, five minutes:

  1. Both calf stretches — knee straight, then knee bent, thirty seconds each
  2. Plantar fascia stretch — seated, foot across the opposite knee, pull the toes back toward your shin
  3. Two minutes on the sole — comfortable pressure along the arch. Research on self-myofascial release found roughly half the flexibility gain arrives in the first two minutes. (A wooden foot roller is one convenient way to do this, and is what we make.)

⚠️ Firm, never sharp. Skip firm rollers entirely if you have reduced sensation in your feet.

Honest caveat: no study has tested a post-run routine against heel-pain incidence. What it does is maintain the ankle range that is your biggest risk factor, and make you notice changes early.

The signal, and why runners in particular ignore it

A sharp twinge in the first few steps out of bed that eases within a minute.

Not sore feet after a long run. Specifically the morning, specifically the first steps.

At that stage this is cheap: cut volume for a fortnight, drop the hills and the speed, get serious about calf stretching, and look hard at what changed three to six weeks ago.

Runners ignore it for a specific reason: it does not affect running. By the time you are warmed up and out the door, it is gone. So it is easy to conclude it is not a running problem — right up until it is.

The pain that vanishes after ten minutes is not the pain going away. It is the tissue warming up.

If it has already started

Complete rest tends to disappoint, because the tissue is degenerative and rest removes the provocation without repairing anything. The workable middle is reduced volume, easier intensity, softer surfaces and flatter routes, judged by two rules: pain at or below about 3/10 during the run, and no clear worsening the next morning.

And expect months. Trials measure primary outcomes at three months and follow to twelve.

FAQ

Is running in minimalist shoes riskier? Not inherently — the transition is the risk. Going to a much lower drop quickly demands ankle range you may not have.

Should I stop running at the first twinge? Not necessarily stop, but reduce meaningfully and drop the hardest sessions. Two weeks of sensible reduction beats three months of stubbornness.

Do I need custom orthotics? Not as a first step. Prefabricated devices have generally performed comparably to custom for this condition, and nothing supports permanent use.

How soon after recovering can I build back? Slowly, from a lower base than you want, reintroducing intensity last. And keep the strength work going after the pain resolves — stopping it is the most common route back.

Sources

  • Riddle DL, Pulisic M, Pidcoe P, Johnson RE. Risk factors for plantar fasciitis: a matched case-control study. Journal of Bone and Joint Surgery (Am), 2003
  • Rathleff MS et al. High-load strength training improves outcome in patients with plantar fasciitis. Scandinavian Journal of Medicine & Science in Sports, 2015
  • Hicks JH. The mechanics of the foot: II. The plantar aponeurosis and the arch. Journal of Anatomy, 1954
  • Journal of Orthopaedic & Sports Physical Therapy — Heel Pain–Plantar Fasciitis: Revision 2023 (APTA clinical practice guideline)

This article is general education, not medical advice. Sudden sharp heel pain with a pop or bruising should be assessed promptly.