The correct answer is - Performing the activity in which one want to improve. e.g. running 3x per mile time
Explanation:
Specificity is one of the three training principles. Specificity refers to the fact that adaption of the change in the fitnes or body is specific to the trainng or physical skill is undertaken.
Specificity is basically what you get is what you do in other words the change in the skill or in the body is depends on the actiity one is want to improve. Suppose arunner who want to improve its ability to run faster is to run faster need to improve the activity of running.
