Sociological study of performance of Level B and C difficulty jumps of Wushu routine;

An analysis on the techniques of woman s individual difficulty movement in the 9th World Aerobics Championship;

The results show that: movement difficulty mainly develops toward the improvement of movement linkage difficulty; the direction of flip linkage mainly develops toward for-flip and turning.

It degrades the demand of rotating occasion and enhances the movement difficulty about three-circle flip.

The action of turning body circumgyrating 720° is one of the most difficult action in difficulty movements of Wushu routines.

This paper analyses the difficult actions of mix-double event in 9th Aerobic Gymnastics world championships by data investigation,observation log and data statistic.

The result shows that in current world aerobic mix-double,the pattern structure of difficult action in a series of actions tend to be " 2 A,2B,6C and 2D".

A comparative analysis on the difficulty of China and foreign excellent athletes of floor exercise under the new rules;

Difficulty Movement Characteristics and Training of Martial Arts;

Difficulty Movement Characteristics and Training of Lin Fan of Southern Style Boxing

Through using the method of video analysis,comparative analysis and literature review,this paper analyzes the difficulty movements of China athlete and champion in the 9th world sports aerobics championships.