The article by Sheppard and Young reviews the literature on agility, proposing a new definition that integrates both physical and cognitive components. The authors argue that current definitions of agility are inconsistent and lack clarity, leading to confusion in training and testing. They propose a new definition: "a rapid whole-body movement with change of velocity or direction in response to a stimulus." This definition emphasizes the importance of cognitive processes such as visual scanning and decision-making, as well as physical components like strength, power, and technique. The review highlights the lack of a strong relationship between straight sprinting speed and change of direction speed, suggesting that these are distinct physical qualities. Strength and power measures do not strongly predict change of direction speed, although reactive strength imbalances may influence performance. Anthropometric factors, such as body fat percentage and limb length, may also play a role, but more research is needed. The article also discusses the limitations of existing agility tests, which often focus on physical components like change of direction speed without incorporating cognitive challenges. It suggests that more specific and sport-relevant tests are needed to accurately measure agility. The authors propose a new test protocol that uses sport-specific stimuli to assess agility, demonstrating its potential to differentiate between high and low performers in a sport like netball. In conclusion, the authors emphasize the need for a clear and comprehensive definition of agility, as well as more specific and sport-relevant training and testing methods to enhance performance in sports that require agility.The article by Sheppard and Young reviews the literature on agility, proposing a new definition that integrates both physical and cognitive components. The authors argue that current definitions of agility are inconsistent and lack clarity, leading to confusion in training and testing. They propose a new definition: "a rapid whole-body movement with change of velocity or direction in response to a stimulus." This definition emphasizes the importance of cognitive processes such as visual scanning and decision-making, as well as physical components like strength, power, and technique. The review highlights the lack of a strong relationship between straight sprinting speed and change of direction speed, suggesting that these are distinct physical qualities. Strength and power measures do not strongly predict change of direction speed, although reactive strength imbalances may influence performance. Anthropometric factors, such as body fat percentage and limb length, may also play a role, but more research is needed. The article also discusses the limitations of existing agility tests, which often focus on physical components like change of direction speed without incorporating cognitive challenges. It suggests that more specific and sport-relevant tests are needed to accurately measure agility. The authors propose a new test protocol that uses sport-specific stimuli to assess agility, demonstrating its potential to differentiate between high and low performers in a sport like netball. In conclusion, the authors emphasize the need for a clear and comprehensive definition of agility, as well as more specific and sport-relevant training and testing methods to enhance performance in sports that require agility.