If you’ve ever stepped out of bed and felt a sharp pain in your heel, you’re not alone.

Plantar fasciitis is one of the most common causes of foot pain that I treat at my clinic, The Body Lab in Canberra, The Body Lab,  affecting up to 10% of the population across their lifetime. It’s particularly common in people who spend long hours on their feet, suddenly increase activity levels, or simply keep walking on a foot that isn’t distributing load very well.

Most people are told it’s an “inflammatory condition,” given stretches or orthotics, and advised to rest.

Sometimes that helps. But often, the pain keeps coming back.

Because plantar fasciitis is usually not just an inflammation problem.

It’s a load and movement problem.

What the Plantar Fascia Actually Does

The plantar fascia is a thick band of connective tissue that runs from your heel to your toes. Its role is not just to hold up the arch—it plays a key part in how your foot manages force during walking.

When you walk, the foot contacts the ground, the arch lowers slightly to absorb load, and the plantar fascia lengthens under tension. Energy is stored and then released during push-off as the heel lifts and the body moves forward.

This process is known as the Windlass Mechanism, where the fascia tightens as the big toe extends, helping stiffen the foot into a lever for propulsion.

This is what allows walking to feel efficient rather than effortful.

What Goes Wrong

In plantar fasciitis, this system becomes overloaded.

Research suggests that plantar fasciitis is more accurately described as a degenerative condition (fasciosis) rather than a purely inflammatory one (Lemont et al., 2003). Histological studies show collagen disorganisation, micro-tearing, and thickening of the fascia—changes consistent with repeated mechanical stress over time.

In simple terms, the tissue isn’t just inflamed—it’s being overloaded repeatedly without enough recovery.

Why It Hurts in the Morning

That sharp pain when you take your first few steps is one of the most consistent features of plantar fasciitis.

Overnight, the plantar fascia shortens slightly while the foot is at rest. When you stand, you suddenly apply load through a structure that hasn’t been gradually prepared.

It’s similar to stretching a tight elastic band too quickly. That rapid loading creates a sharp, localised pain at the heel.

The Role of Load and Walking

Every step you take places force through your foot—typically around 1.2 to 1.5 times your body weight during walking, and higher with increased speed or activity (Winter, 1991).

That force has to be distributed. If your foot is moving well, the heel absorbs initial contact, the arch spreads load, and the body transitions forward smoothly with assistance from the big toe during push-off. If it’s not, the plantar fascia takes on more of the load—and it does this thousands of times per day.

Why Stretching Alone Isn’t Enough

Stretching the calf or rolling the foot can provide short-term relief. But it doesn’t change how load moves through your foot when you walk. If your movement pattern remains the same, the same tissues are loaded, the same stress is applied, and the same symptoms return. This is why many people improve temporarily but don’t fully resolve the issue.

What the Research Shows Actually Works

There is strong evidence supporting progressive loading as a key intervention.

Rathleff et al. (2015) showed that high-load strength training—such as slow, controlled calf raises—significantly improved pain and function in individuals with plantar fasciitis. The likely reason is that it increases the capacity of the tissue to handle load. Similarly, isometric loading has been shown to reduce tendon-related pain and improve load tolerance (Rio et al., 2016).

What Actually Helps in Practice

Improving plantar fasciitis isn’t about one magic exercise. It’s about improving how your foot functions as a system. This often includes restoring ankle movement, improving arch mobility, allowing the big toe to extend properly, gradually strengthening the calf and foot, and improving walking mechanics.

When movement improves, load distributes better, stress reduces, and symptoms settle.

Plantar fasciitis is rarely just a “foot problem.”

It reflects how the entire system is working—from the foot and ankle through to the knee, hip, and pelvis.

If one part isn’t contributing properly, another part compensates. Often, the plantar fascia ends up doing more than its fair share.

 

Natural Medicine Week Educational Session

As part of Natural Medicine Week (25–31 May), organised by the Australian Traditional-Medicine Society, I’ll be hosting a free online educational session:

Plantar Fasciitis: Why It Happens and How to Improve Foot Function

https://www.thebodylab.au/natural-medicine-week-session

We’ll explore:

• why plantar fasciitis develops
• how walking affects load through the foot
• how joints, tendons and nerves respond to stress
• simple ways to improve foot function

 

References

Lemont, H., Ammirati, K.M. & Usen, N. (2003). Plantar fasciitis: a degenerative process (fasciosis) without inflammation. Journal of the American Podiatric Medical Association, 93(3), 234–237.

Rathleff, M.S., Mølgaard, C.M. & Fredberg, U. (2015). High-load strength training improves outcome in patients with plantar fasciitis: A randomized controlled trial. Scandinavian Journal of Medicine & Science in Sports, 25(3), e292–e300.

Rio, E., Kidgell, D., Purdam, C., Gaida, J., Moseley, G.L., Pearce, A.J. & Cook, J. (2015). Isometric exercise induces analgesia and reduces inhibition in patellar tendinopathy. British Journal of Sports Medicine, 49(19), 1277–1283.

Winter, D.A. (1991). The Biomechanics and Motor Control of Human Gait: Normal, Elderly and Pathological. Waterloo Biomechanics.