Which of the following is a potential consequence of improper modality use?

The correct answer highlights the risk of exacerbating pain as a potential consequence of improper modality use in physical therapy. When modalities, such as heat therapy, cold therapy, electrical stimulation, or ultrasound, are not applied correctly, they may not provide the intended relief or improvement. Instead, inappropriate usage can lead to increased inflammation, irritation of tissues, or further injury, ultimately intensifying pain rather than alleviating it.

In contrast, the other outcomes, like increased muscle flexibility, enhanced athletic performance, and a lesser need for therapy, suggest positive results that can occur with proper modality use. However, if modalities are misused, the beneficial effects that might lead to increased flexibility or performance are unlikely to be achieved. Therefore, understanding the importance of modalities and their correct application is essential to avoid any negative consequences, particularly exacerbating pain.