In this lesson, coaches delve into the intricacies of hot phase mechanics in triple jumping, focusing on the critical aspects of takeoff and arm action. Students learn how proper arm movement at takeoff varies between male and female athletes, with emphasis on maintaining sprinting momentum and achieving optimal positioning for effective propulsion. The discussion also highlights the significance of arm and leg coordination, the role of free leg extension, and techniques to enhance hip alignment and stride length. Through detailed analysis and practical demonstrations, participants gain insights into refining their approach to the hot phase, optimizing performance, and minimizing common pitfalls in triple jump technique.