The acronym "F.I.T.T." stands for Frequency, Intensity, Time, and Type in exercise programming. It provides a framework for creating a balanced and effective workout plan. Frequency refers to how often you exercise, intensity focuses on how hard you train, time addresses the duration of the workout, and type specifies the nature of the exercise (aerobic, strength, flexibility, etc.). Utilizing the F.I.T.T. principle helps tailor workouts to individual goals and fitness levels, optimizing overall health and performance.