Which of the following is an example of modifying movement during performance?

Modifying movement during performance refers to making adjustments to how an exercise or activity is executed to better suit an individual's capabilities or to address specific goals. Adjusting range of motion is a key example of this because it involves changing how far a joint moves during an exercise. This can be beneficial for a variety of reasons, such as accommodating injuries, improving flexibility, or focusing on specific muscle groups. By modifying the range of motion, an individual can ensure that they are performing the exercise safely and effectively, while also enhancing their overall performance and adaptation to training.

The other options reflect different approaches to exercise that do not specifically focus on modifying the movement itself. Performing exercises without any rest does not adjust the execution of a movement; rather, it impacts the overall intensity and endurance challenges. Increasing the tempo of the workout changes the speed but does not inherently modify the fundamental movements involved. Ignoring signs of fatigue can lead to improper technique and increased risk of injury, which does not constitute a thoughtful modification to movement.