The training principle that states that exercising a certain body part or practicing a particular skill primarily develop that part or skill is:
specificity
Step-by-step explanation:
The best coaching programmes are designed on principles of specificity, overload, progression, and changeableness. You'll additionally use the FITT descriptor to assist bear in mind the key things to contemplate once craft programmes for individual sporting goals. It stands for; Frequency, Intensity, Time and kind.