Subjects were randomly assigned to either the group first practicing with penholder grip then with shakehand grip or to the group first using shakehand grip then using penholder grip.

• 练习与测验时分成两组，每位受试者同时练习两种握拍法以抽签决定先后顺序，再学习推挡、正手击球、反手击球、搓球等四种动作。