Mechanical indicators on the board of the champions of Egypt in the long jump men

Document Type : Original Article

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Abstract

1-    dentification of differences in some mechanical indicators on the board of upgrading and heroes of Egypt under 20 years.
2-    dentify the differences in the long jump distance of the "digital level" of the research sample.
3-    Diagnosis of the shortcomings and strength points in the members of the research sample during the stage of upgrading and its relation to the digital level of long jump players.
The sample of the analysis was chosen in a deliberate manner for the best (6) players and achieved the highest result of the imaging and analysis, and each player made (6) attempts, and was chosen the best attempt of them.
Conclusions:
1 - horizontal distance to move from the foot position on the board, and even the vertical line is greater than the distance from the vertical position, and even a moment before leaving on the plate.
2 - vertical range of the center of gravity from the moment the foot on the plate, and even a moment before leaving on the board ranges between (0.28: 0.42) meters.
3 - The researcher returns to increase the speed that the player out of the board to the movement of the movement of the parties, especially the free man.
4 - The researcher returns to the low speed that comes out of the player on the board upgrade to increase the time to focus on the painting.
5 - the greater the angular range of the movement of the thigh increased the time of upgrading and the latest loss of speed on the plate.
6 - angular change of the knee on the board during the upgrade may be increase or decrease.
7 - angular change of the foot on the board during the upgrade may be increase or decrease and that the full use of the achievement of the digital level must be increased.
8. The angular change of the center of the body weight around the foot of the scale is only increased.
9. The following variables can be used (horizontal distance from vertical position to moment before departure, angle of elevation before moment of abandonment, loss of speed, thigh angle at the moment of foot position, knee angle at exit, foot angle of foot at moment of foot position) In the stage of upgrading in the long jump on the basis that the respondents represent the best players digitally in the long jump in Egypt.
10. The exit speed should be greater than the speed of entry on the board in the long jump.

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