Etiology — what causes it
Periosteal and bony stress reaction along the medial tibia, driven by training error, abrupt volume increases, deconditioning, and lower limb biomechanics. Risk factors include high BMI, female sex, prior MTSS, and navicular drop.
Epidemiology — who gets it
Common in runners and military recruits — incidence up to 35% in runners (Lopes et al., Sports Med). Highest in athletes with recent volume increases.
Clinical signs
Diffuse tenderness along the medial tibial border, typically over a 5+ cm region (distinguishes from focal stress fracture). Mild swelling sometimes. Pain reproduced with hopping or repetitive loading.
Symptoms
Aching pain along the medial shin, worse early in run and improving with warm-up — but worsening if loading continues. Progressive over weeks if not addressed.
Best evidence for chiropractic treatment
Load management (a deload week with reduced volume) plus capacity-building — calf and hip strength, foot intrinsic strength, gait retraining (increasing cadence by 5–10%). Footwear assessment in selected cases. If symptoms become focal and worsen, stress fracture must be ruled out.
When to seek emergency care
Some symptoms need urgent medical attention — not a chiropractic visit. Call 911 or go to the nearest emergency department for: progressive limb weakness, loss of bowel or bladder control, saddle anesthesia (numbness in the groin/inner thighs), severe unrelenting pain unrelieved by position, signs of fracture after significant trauma, chest pain, stroke-like symptoms (face drooping, arm weakness, speech changes), or any rapidly worsening or unusual symptom.
Bottom line
MTSS is a capacity issue. Deload, build capacity (calf, hip, intrinsics), and reload progressively — running through it usually backfires.