In competitive sports, injuries are inevitable. This was true in the past and is true now. There is no argument that players in the past were not so prone to injuries. If that were the case, Rose wouldn't have made everyone so sad, and Yao Ming wouldn't have retired early. Injuries occur in several situations. One is the fierce confrontation on the court, such as the Celtics against the Cavaliers in the opening game, Hayward's. At that time, Hayward tried to make an alley-oop during the offense and had a confrontation with James in the air. As a result, he lost his balance and slammed down. The entire weight of his body was pressed on the outturned ankle, causing the ankle to be severely dislocated and ended up being reimbursed for the season. The second is overuse by the team or coach. This is the case with Yao Ming. A big man with a height of 2.26 meters and a weight of 140 pounds averaged 37 minutes per game at his peak. Moreover, in addition to the NBA, he also played in various national team games, which can be said to be a serious overdraft.