{"id":219207,"date":"2026-02-02T10:57:04","date_gmt":"2026-02-02T10:57:04","guid":{"rendered":"https:\/\/wandsworthphysiotherapy.co.uk\/?p=219207"},"modified":"2026-02-02T10:57:07","modified_gmt":"2026-02-02T10:57:07","slug":"bone-stress-injury","status":"publish","type":"post","link":"https:\/\/wandsworthphysiotherapy.co.uk\/bone-stress-injury\/","title":{"rendered":"Is Your Winter \u201cBase Mile\u201d Training Masking a Stress Fracture or Bone Stress Injury?"},"content":{"rendered":"\n

January. New shoes. Big plans. Bigger mileage – Bone Stress Injury .<\/strong><\/p>\n\n\n\n

For many runners, January isn\u2019t just the start of a new year; it\u2019s the start of Marathon Season.<\/p>\n\n\n\n

With the London and Brighton marathons looming in April, the \u2018base mile\u2019 phase is in full swing. The goal is simple; build an aerobic engine by stacking up the miles.<\/p>\n\n\n\n

But unfortunately, for some runners the excitement of a new training block, combined with the unique physiological challenges of a British winter can hides the early warning signs of a Bone Stress Injury (BSI), more commonly known as a stress fracture.<\/p>\n\n\n\n

At Wandsworth Physiotherapy, we see a familiar pattern every winter – runners who believe they have a \u201cachy foot\u201d, \u201cgrumpy shin\u201d, or \u201chip niggle that will settle\u201d\u2026 when in fact, they\u2019re running straight through the early stages of a bone stress injury.<\/p>\n\n\n\n

This blog isn\u2019t about panic or stopping training unnecessarily. It\u2019s about knowing when your body is adapting, and when it\u2019s quietly waving a red flag.<\/strong><\/p>\n\n\n\n

\"bone<\/figure>\n\n\n\n

Why Winter Running Is Harder on Your Bones Than You Think for Bone Stress Injury <\/h2>\n\n\n\n

Bone is a living tissue. It remodels constantly in response to load; a process known as Wolff\u2019s Law<\/strong>.<\/a> In simple terms: the right<\/em> amount of impact makes bone stronger. Too much, too soon? That\u2019s where problems start.<\/p>\n\n\n\n

Winter changes the equation in several ways:<\/p>\n\n\n\n

Harder, Less Forgiving Surfaces<\/h3>\n\n\n\n

Frozen pavements, compacted paths, and cambered roads increase ground reaction forces. Unlike summer trails or grass, these surfaces don\u2019t absorb much shock, instead, your bones do!<\/p>\n\n\n\n

Mileage Goes Up, Intensity Sneaks In<\/h3>\n\n\n\n

\u201cEasy miles\u201d often aren\u2019t as easy as we think. Fatigue alters running mechanics, subtly increasing load through the tibia, metatarsals, femoral neck, and pelvis.<\/p>\n\n\n\n

Vitamin D Takes a Hit<\/h3>\n\n\n\n

During UK winters, sunlight exposure drops dramatically, and with it, Vitamin D<\/a> synthesis, which is essential for calcium absorption and bone health. Studies consistently show high rates of Vitamin D insufficiency in endurance athletes during winter months.<\/p>\n\n\n\n

Strength Training Gets Forgotten<\/h3>\n\n\n\n

Shorter days, busier schedules, and more running often means that runners skip their resistance training sessions – removing a key protective factor for bone density.<\/p>\n\n\n\n

\"Bone<\/figure>\n\n\n\n

Bone Stress Injury: Stress Reaction vs Stress Fracture: The Spectrum Many Runners Miss<\/h2>\n\n\n\n

Bone stress injuries sit on a continuum, not a switch.<\/p>\n\n\n\n