Which of the following is NOT a structural limitation to movement?

Body weight is not considered a structural limitation to movement because it does not inherently restrict the mechanical ability of the body's structures to perform movements. Structural limitations typically refer to the characteristics of the body's tissues that directly affect movement quality and range. For instance, specific features of the bones, such as their shape and alignment, can significantly influence the joint range of motion and overall movement efficiency. Similarly, tendons play a crucial role in connecting muscles to bones, impacting how effectively a muscle can generate force during movement. Stiff muscles can limit flexibility and range of motion, thus affecting performance.

In contrast, body weight, while it can affect overall mobility or performance in activities (due to factors like gravitational effects or stamina), is not a characteristic of the body's structure itself. It does not fall under the category of intrinsic limitations that determine how movement is executed or influenced by the physical characteristics of the body. Therefore, recognizing that body weight relates more to an external factor rather than an intrinsic anatomical feature clarifies why it is the correct choice for this question.