Table 2.

Basic information of the research objects and performance used for analysis.

	Name	Nationality	Research performance (m)	Grade
Chinese	Chen 1	China	65.85	Athlete
	Chen 2		65.13
	Feng 1	China	59.37	Athlete
	Feng 2		58.89
	Su 1	China	58.10	Athlete
	Su 2		58.05
World	Sandra Perkovic	Croatia	65.58	Athlete
	Olga Burova	Russia	67.40	Athlete
	Daniela Costain	Australian	65.36	Athlete
	Min Chun Feng	China	65.26	Athlete