In Haikyuu!!, technological advancements in training are depicted through the use of specialized equipment and tools to enhance players' skills and performance. For example, the characters utilize video analysis software to study their opponents' strategies and improve their own tactics. Additionally, they may use wearable devices to track their physical metrics such as speed, agility, and jump height to optimize their training regimen. These technological advancements help the characters in Haikyuu!! to push their limits and strive for continuous improvement in their volleyball skills.