Final answer:
Increasing the intensity of training can help athletes improve their performance.
Step-by-step explanation:
The FITT principle is a framework used to guide training programs and stands for Frequency, Intensity, Time, and Type.
One element of the FITT principle that can help athletes improve their performance is Intensity. By increasing the intensity of their training, athletes can challenge their bodies to adapt and improve their physical abilities. For example, a track athlete can increase their running speed during interval training sessions to improve their sprint performance.