A stress fracture is most likely caused by which factor?

• A. Increasing exercise intensity
• B. Decreasing exercise intensity
• C. Starting a new sport without conditioning
• D. Eating spicy food

Answer: (A)

Stress fractures come from repetitive loading on bone that outpaces its ability to repair and remodel. When training intensity is increased, the forces on weight-bearing bones rise and more micro-damage occurs with each repeated impact. If the body doesn’t have time to repair this micro-damage, those tiny cracks accumulate and can develop into a stress fracture. So, increasing exercise intensity directly ups the repetitive load on the bone, making it the most likely cause among the options. Lowering intensity reduces the stress and allows recovery. Starting a new sport without conditioning can also cause overload injuries, but the immediate driver in this context is the rapid rise in repetitive loading. Spicy food has no impact on bone stress.