Causes of a Broken Leg Causes of a Broken Leg typically involve high-force trauma, repetitive strain, or impact that exceeds the bone’s ability to withstand stress. The most common causes of a broken leg include vehicle accidents, sports injuries, falls, and direct blows to the leg. The type of force and the patient’s bone health influence the location and severity of the fracture. Car and motorcycle accidents are among the leading causes, especially for femur fractures. In a collision, the leg may be compressed, twisted, or struck directly, resulting in serious breaks that often require surgical repair. Pedestrians and cyclists are also at high risk of sustaining leg fractures in road incidents. Sports injuries are another frequent cause. Footballers, rugby players, skaters, and runners often sustain lower leg fractures from sudden stops, twists, or tackles. A misstep or awkward landing can cause a tibial or fibular break, particularly in contact sports or when adequate protective gear isn’t used. Falls — whether from stairs, ladders, or while hiking — are a common source of fractures, especially among older adults or people with balance issues. The leg may twist unnaturally or absorb the full impact of the fall, leading to one or more fractures. Causes of a Broken Leg Workplace accidents, particularly in construction or factory environments, are also notable contributors. A heavy object falling on the leg or getting caught in machinery can easily break the bones. These injuries may be more complex and involve soft tissue damage or open wounds. Stress fractures are less dramatic but still serious. They occur from repeated impact or overuse, especially in athletes or soldiers. These small cracks in the bone may initially be painless but can worsen over time and develop into full fractures. Underlying health conditions like osteoporosis significantly raise the risk. People with low bone density can suffer a broken leg from what would otherwise be a minor impact. In such cases, fracture prevention is just as important as treatment. Understanding the causes of a broken leg can help individuals take appropriate precautions — whether through better footwear, using safety gear, or building muscle strength to support bone integrity. [Next: Symptoms of a Broken Leg →]