Introduction

Karate is a martial sport that is known as one of the most popular martial arts around the world {Jeknić, 2022 #1}, which is based on fighting with bare hands and without any equipment, and requires movements It is very fast {Pappas, 2007 #49}

problem statement

According to Mousso's classic definition of fatigue, fatigue is a debilitating factor that limits physical and cognitive performance that interact with each other {Enoka, 2016 #62}, which actually physiologically means the failure of internal homeostasis caused by an increase in of the energy production required by an external stimulus

The necessity and importance of research

Ankle sprains are often associated with reduced sensory control and motor control, which according to reports, after acute ankle sprains, there are changes such as decreased proprioceptive function caused by decreased joint position sense and motor function, as well as decreased muscle strength and Reduction of the body's balance function is one of the other changes caused by this injury

Type and method of research:

This research is a semi-experimental and comparative design that will be done in two stages (before and after the fatigue protocol). After screening, people with ankle sprain injuries are separated from healthy people without injuries All these people are karate champions of the country and are divided into two groups