Which of the following is considered an intrinsic risk factor for injury?

The history of previous injury is considered an intrinsic risk factor for injury because it relates to an individual's unique characteristics and past experiences that may predispose them to future injuries. An individual who has previously sustained an injury may have residual weakness, imbalances, or altered movement patterns that increase the risk of reinjury. This factor is internal to the person and reflects their physical condition, adaptation, and recovery capabilities.

In contrast, the other options represent extrinsic factors. Environmental hazards involve external conditions that might lead to injuries, such as slippery surfaces or uneven terrain. Improper footwear pertains to external equipment choices that can affect performance and injury risk. Excessive workouts without rest, while related to training practices, still focus on external manipulation of training load rather than individual predispositions. Recognizing the difference between intrinsic and extrinsic factors is crucial for developing preventive strategies in exercise physiology.