The principle of progression states that you should increase overload, which can be achieved by using FITT (frequency, intensity, time, and type) when your body adapts to its present routine. The specificity principle states that only targeted exercises will improve specific fitness goals. The principles of specificity, progression, and overload, are why practicing frequently and consistently are so important if you want to improve your performance. When you increase the repetitions, amount of weight, or length of time in an exercise you're accustomed to, you're applying overload.
