The concept of holds that training is most effective when the resistance exercises selected are most similar to the actual movement which is essential in a given sport activity.

The concept of training specificity holds that training is most effective when the resistance exercises selected are most similar to the actual movement which is essential in a given sport activity.

Explanation:

This trainging specificity shows that it is importat  when practicing an sport, that the training is directed to specific excersises that are related to the movements present in the sport that is practiced. The name of this is sports-especific excersises. Which again are excersis of resistance planed specificly for a particular sport,

An example: jump a rope, go up and down staris, run side by side from left to right. This are resistance excersises but applied to tennis. In tennis it is important to have ley agility so this excersises focus on that.