Most running injuries are load injuries. They happen when training demand rises faster than tissue can adapt — after a jump in mileage, a new session type, a return from time off, or a change in surface or terrain. Running form gets far more attention than the evidence supports: no single form is correct, and attempts to change it produce inconsistent results. Load, by contrast, explains most of what goes wrong and is the most modifiable factor available. One category needs separating from the rest: bone stress injuries behave differently from soft tissue injuries, and running through them makes them substantially worse.
Why load explains most of it
Tissue adapts to what is asked of it, slowly. Injuries occur when demand rises faster than that adaptation. The usual culprits:
- A sudden increase in weekly distance
- Adding speed work or hills without building to it
- Returning after a break at the volume you left at
- Racing without the training base behind it
- A change in surface, terrain or shoes
- Inadequate recovery — sleep, and time between hard sessions
Total stress matters, not just running. A hard week at work, poor sleep, and a new gym program all draw on the same recovery capacity.
On running form
Form receives disproportionate attention. There is no single correct running form. Efficient runners vary considerably, and attempts to change someone’s natural pattern have produced inconsistent results and sometimes new problems.
Two things have more support than the rest:
- Cadence. Increasing step rate modestly reduces load at the knee and hip. It is one of the better-supported form changes, and it is straightforward to alter.
- Overstriding. Landing with the foot well ahead of the body increases braking forces. Increasing cadence tends to address this without needing to think about foot placement.
What has weaker support: foot strike pattern, barefoot or minimalist running as injury prevention, and most footwear claims. Shoe research has repeatedly failed to demonstrate that prescribing shoes by foot type reduces injury. Comfort remains the most useful shoe criterion available.
Common running injuries
- Patellofemoral pain — pain around the kneecap, worse on stairs, hills and after sitting. Responds to hip and knee strengthening and load management.
- Iliotibial band syndrome — pain on the outside of the knee, often at a consistent point in a run. Load and hip strength.
- Achilles tendinopathy — see tendinopathy, where the loading approach is set out.
- Plantar heel pain — worst with the first steps in the morning. Responds to loading, not rest.
- Medial tibial stress syndrome — diffuse pain along the inner shin. Distinguish from bone stress injury, which is focal rather than diffuse.
- Bone stress injuries — the category above, and the one that needs stopping for.
- Hamstring and calf strains — usually from speed work, and prone to recurrence when rehabilitation stops early.
Energy availability and bone health
Worth knowing about, and frequently missed. Persistently taking in less energy than training demands affects bone health, hormones and recovery, and it raises the risk of bone stress injuries substantially. It is recognized clinically as relative energy deficiency in sport.
Signs a clinician looks for: repeated bone stress injuries; frequent illness; persistent fatigue and poor recovery; in women, changes to or absence of menstrual periods; reduced performance despite training.
This needs proper medical assessment, not a self-managed adjustment. If several of these apply to you, speak to your doctor — it is treatable, and it is a genuine cause of injuries that otherwise look like bad luck.
What helps
- Manage load first. Reduce the aggravating volume or intensity rather than stopping entirely, then rebuild gradually.
- Strength training. Consistently associated with reduced running injury risk, and underused by runners.
- Progressive loading of the injured tissue — the same principle as tendinopathy.
- Address cadence if overstriding is present.
- Sleep and recovery, which are training variables rather than optional extras.
- Physical therapy for anything recurring, not settling, or worsening.
Goals worth setting
Run 30 minutes with no symptoms the next morning · Return to three runs a week · Complete a long run without knee pain · Get through a training block without missing sessions
Reduce knee pain · Improve running mechanics
Related
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Frequently asked questions
Why do I keep getting injured?
Most commonly, load — a rise in training demand faster than tissue can adapt. Look at what changed in the four to six weeks before symptoms started, including sleep and non-running stress.
Is my running form causing my injury?
Probably less than you think. There is no single correct form, and attempts to change it produce inconsistent results. Cadence is the exception with reasonable support.
Should I change my shoes?
Shoe research has repeatedly failed to show that prescribing by foot type reduces injury. Comfort is the most useful criterion available.
Can I run through this?
It depends. Many soft tissue problems tolerate modified running. Bone stress injuries do not — focal bone pain, pain worsening through a run, or pain at rest means stop and get assessed.
What is the 10% rule?
A common guideline that weekly mileage should not rise more than 10%. It has limited evidence behind it. Increasing gradually and monitoring your response is sound; the specific figure is not validated.
Does strength training help runners?
Yes — it is consistently associated with reduced injury risk and is one of the more underused interventions among runners.
Why do I keep getting stress fractures?
Worth investigating properly. Repeated bone stress injuries can indicate that energy intake is not matching training demands, which affects bone health. Speak to your doctor rather than adjusting training alone.