Answer:
The Overload Principle - The basic principle that specifies that you perform physical activity in greater than normal amounts (overload) to get to an improvement in physical fitness health benefits.
The F.I.T.T. Principle - FITT (frequency, intensity, time, and type) is one way to remember the general guidelines for what should be included in a fitness plan.
The Specificity Principle - Principle that states the body will adapt to the specific demands that are placed on it.
The Rest and Recovery Principle - suggests that rest and recovery from the stress of exercise must take place in proportionate amounts to avoid too much stress
The Use It or Lose It Principle - meaning that one must continually engage in and practice an ability or risk losing it.