Technical Analysis and Development of Single Bamboo Floating from the Perspective of Education and Psychology
Experimental Study on the Effect of Background Interference on Tennis Players' Serving Performance
Abstrct
The learning of tennis movement skills is rather complex and requires repeated practice and body coordination. It is difficult to master standardized technical movements in a short period of time. Therefore, a variety of training methods have been developed to facilitate the learning of tennis movement skills. In particular, the theory of background interference has been discussed by many scholars in recent years. Whether background interference is beneficial or detrimental to the learning of tennis movement skills requires further validation by scholars. Based on research methods such as literature, experiments, expert interviews and mathematical statistics, the effect of background interference on tennis players' serving technique training was examined using 15 Level 2 tennis players with no significant difference as subjects in a sports institute. They were divided into three groups of 5, each by serpentine grouping. The experiment was conducted for 4 weeks, with 3 sessions per week, for a total of 12 sessions of training. Four experimental indices (serving performance, accuracy, inside-angle accuracy, and speed) were selected for testing. The results showed that: (1) During skill acquisition, the players comprehended tennis serves more deeply. Moreover, they improved the power and speed of the serve and controlled the direction of the drop better. (2) The results of the retention test reflected the performance characteristics of effective learning, with the persistent practice effects. High background-interference practice facilitated long-term memory and also clarified each serve more distinctly. (3) After high background-interference exercises, athletes tolerated stress better in migration tests, enabling themselves to adapt to new operating environments quickly. The training method of the randomized training group was shown to be more effective than the sequence and group training methods in improving technical stability in a high-stress, high-intensity environment. (4) The results of the skill acquisition, retention test, and migration tests were all following the experimental expectations, and the athletes' serving accuracy as well as their serving scores all improved to different degrees, confirming that the high background-interference practices were conducive to the athletes' skill retention and migration.
María Dolores Molina Poveda, Eduardo Galak
Abstrct
The advent of cinema brought with it its use as a propaganda device with which to transmit ideals and doctrines. As a result, newsreels and cinema documentaries were born with the aim of showing the «most relevant» news of the country and abroad, the former with a shorter duration. In this study, the Spanish NO-DO and «Sucesos Argentinos» are used as primary sources to interpret the images and imaginaries that were projected between 1943 and 1955 on female physical culture. The intention is to understand the official discourse of both political regimes on what Argentinean and Spanish society should be like, especially by questioning those meanings about women. In total, 69 issues of NO-DO and 14 editions of «Sucesos Argentinos» have been found which aim to show female physical culture in this period. The female physical culture shown in both newsreels was aimed at strengthening women’s bodies so that they could carry out their «natural functions» (mother, wife, housewife), as well as highlighting their «inferiority» in relation to men through lower impact activities and the homogenization of bodies through clothing, and the performance of the same exercises in synchrony. And all this in countries with different regimes, but which, in the end, coincided.
Keywords:
female physical culture, NO-DO, Sucesos Argentinos, propaganda, audio-visual images
