What causes bone fatigue?

Bone fatigue occurs as a result of repetitive loading on bones over time, leading to microscopic damage that can accumulate if the bone does not have sufficient time to repair itself. This process is often referred to as "overloading." As bones experience excessive strain, particularly in activities that involve high levels of impact or stress, they can lose their elasticity. This loss of elasticity makes bones more susceptible to fatigue and fractures.

In this context, overloading is critical because it emphasizes how consistent pressure on bones beyond their natural capacity can lead to fatigue failures, much like how a metal can become weaker after being bent repeatedly. Understanding this phenomenon highlights the importance of allowing adequate recovery time and ensuring that training regimens are balanced to prevent exceeding the loading capacities of bones.

While other factors like inadequate nutrition, age-related degeneration, and chronic inflammation can contribute to general bone health and strength, the direct cause of bone fatigue specifically relates to the mechanical loading and the resultant loss of elasticity.