A long-distance runner experiences a stress fracture in their tibia. Which biomechanical mechanism, resulting from repetitive loading, best explains the bone remodeling failure?

💡 Explanation

When repetitive stress exceeds the bone's ability to repair itself via bone remodeling, microcracks accumulate. This leads to structural failure because the rate of microdamage exceeds the rate of osteoclastic resorption and osteoblastic bone formation; therefore, a stress fracture occurs, rather than balanced remodeling.

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