Subjects
In this experiment, 16 players with Chinese Tennis Technical Grade 7 (CTN7) level were selected as subjects with reference to the "Chinese Tennis Association Tennis Technical Grade Standards and Assessment Methods (Trial)". They were quite stable in hitting medium-speed balls, but they were not able to do well with any ball, and their ability to control the depth, line and power of hitting the ball lacked good controlBasic information of subjects.No significant difference P > 0.05.