Bone Stress Injury & Stress Fracture
A bone stress injury occurs when repetitive load exceeds the bone’s ability to repair and remodel — causing a continuum from early stress reaction to frank stress fracture. They’re common in endurance runners, military recruits, dancers and athletes who’ve rapidly increased training load.
Getting the diagnosis right (usually requiring MRI) and the return-to-sport timeline correct is critical — a missed stress fracture that is loaded too soon can progress to a complete fracture.
Common Sites
- Tibia: The most common — “shin stress fracture,” often felt as a focal, deep ache on the shin
- Metatarsals: Foot pain, particularly the 2nd and 3rd metatarsals (common in dancers and runners)
- Navicular: Midfoot stress fracture — high-risk, requires MRI, strict rest
- Femur: Thigh or hip pain in high-volume runners — femoral neck stress fractures are a medical emergency
- Lumbar spine (pars): Spondylolysis — common in adolescent athletes involved in extension-based sports (gymnastics, cricket fast bowling, AFL)
- Fibula, calcaneus, pelvis: Less common but possible
Risk Factors
- Sudden increase in training volume or intensity
- Low bone density (osteoporosis, relative energy deficiency in sport — RED-S)
- Poor nutritional intake, particularly calcium and vitamin D
- Running in worn-out footwear or on hard surfaces
- Female athlete triad / RED-S
- Prior stress fractures
Symptoms
- Deep, localised aching pain at the injury site
- Tenderness with direct palpation over the bone
- Pain that starts at a predictable point in a run and worsens
- Swelling in the area (sometimes)
- Night pain in more severe cases
Diagnosis
Diagnosis requires imaging. X-ray is often normal early; MRI is the gold standard and can detect bone stress reactions before they progress to fracture.
Our Role
Acute Phase
- Guiding appropriate offloading — activity modification, crutches or boot where indicated
- Medical liaison for imaging and orthopaedic review where required
- Non-weight-bearing conditioning to maintain fitness
Return to Sport
We design structured, progressive return-to-run and return-to-sport programs using established guidelines. The timeline depends on the fracture site, grade and sport demands.
Addressing the Cause
- Training load and training error analysis
- Running biomechanics assessment
- Nutritional and hormonal screening recommendations (in collaboration with your GP or sports medicine doctor)
- Strength and bone loading program
High-Risk Fractures
Femoral neck, navicular and anterior cortex tibial stress fractures have a high risk of complete fracture or poor healing without complete rest. These require prompt medical review and strict management.
