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KMID : 0351619690100010079
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Kyungpook Medical Journal
1969 Volume.10 No. 1 p.79 ~ p.86
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A Kinesiological Study of Sprint Running in Korean High School Students
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Abstract
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The present author measured the speed of running in the male and female students of Korean high school by the modified electrical timing method of Hill et al. Iron solenoids were placed along the side of the 100 meter running track at 1, 3, 6,10,15, 22, 30, 50, 60, 70, 80, 90 and 100 meters from the starting point. Each time a runner with a strong magnet fastened at his waist passed one of the solenoids, the solenoid induced a current which was recorded on the recorder. In this way the time when a runner passes each point was accurately recorded.
The subjects consisted of 54 male students from 12 to 18 in age, and 49 female students from 13 to 18 in age, and also 12 male athletes and 13 female athletes with total number of 128.
The author plotted the velocity curve in running and further calculated maximal speed, rate of acceleration, propelling force, power and rate of deceleration on the basis of the above recordings.
Comparison was made between non~trained and trained.
The results are as follows:
1. Maximal speed
The maximal speed was found to be 8.20 m/sec in the male athletes and 7.51 m/sec in the female athletes, while in both male and female non-athletes, it was lower as comparedwith the athletes. Male students showed a gradual increase of the maximal speed with age while female students did not show the similar increase with age.
2. Propelling force:
In ma]e students, the propelling force was improved in advancing of age closely related to the development of the muscular strength, while the improvement was not as clear in the female students a.s in those of male.
3. Power:
In male students, the power at start was found to be improved in advancing, of a;e closely related to the development of the muscular strength and surpassed 1 HP (75kg. m/sec) in the 15years of age or more. In contrast, the female students showed lesser improvement in power and did~not surpass 1 HP in all age groups.
4. Rate of deceleration:
The decrease of speed of running, as presented by percent~~ge of the maximal speed at the end of running, was below 10% in male students of 15 or more of age, while from 12 to 18% in the female students. In male athletes, it was 3.6%, and in female it was 1.1% which were markedly reduced rates of deceleration as compared with that of non-trained.
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KEYWORD
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