1981 - mizuno
TRANSCRIPT
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The purposes of this study were to develop an approach to acquiring an effective sprinting technique in children and to examine the effectiveness of this approach. The study participants were 71 6th and 5th grade elementary school children. 33 5th grade children were new approach group, and 38 6th grade children were general approach group. We planned four units for practice of the sprinting technique: pre-practice measurement at the first class, practice at the second and third class and post-practice measurement at the fourth class. We compared new approach group and general approach group. The main results were as follows; 1) In new approach group, sprinting speed, stride length and step frequency over 30-40m after
practice were significantly better than those before practice. But in general approach group, there are no significant different between before and after practice.
2) In new approach group, velocity of C.G. at whole swing leg after practice was significantly larger than that before practice. But in general approach group, there is no significant different between before and after practice.
These results suggest that the approach developed in this study is effective for improving the sprinting ability of elementary school children, being especially effective for children.
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19891981
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2012
Y 5 1 33 18 15T 6 1 38 20 18 71
VTR
42 1 2 1Pre 4 Post 50m
1 2 2 3Y T
1Y T
Pre Post 35m VTR Sony DCR-VX21001/1000sec VTR
30m 40m 2m 14 2
OMRON 71 44 VTR30m 40m 1 2 23 4
Frame-DIASMATLAB 2
44 30m 40m
1/60 VTR 1
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19982001
2
50m
Pre Postt 5
3 4 Y T Pre Post Y
Pre 5.65 0.47m/s Post 6.00 0.50m/s Post Pret=-8.275 p 0.0001 T Pre 6.26 0.49m/s Post 6.01
0.58m/s 5 6 Y T Pre Post Y
Pre 3.52 0.22Hz Post 3.75 0.31Hz Post Pret=-3.845 p 0.001 T Pre 3.59 0.36Hz Post 3.79
0.33Hz 7 8 Y T Pre Post
Y Pre 1.50 0.15m Post 1.57 0.14m Post Pret=-4.115 p 0.001 T Pre 1.58 0.11m Post 1.56
0.13m
9 10 Y T Pre Post
Y Pre 44.54 7.89deg Post 41.33 6.82deg Post Pret=2.325 p 0.05 T Pre 41.35 9.63deg
Post 44.73 10.89deg Post Pre t=-2.336 p 0.05
11 12 Y T Pre PostY Pre 60.08 5.40deg Post 64.34 4.79deg Post Pre
t=-4.958 p 0.0001 T Pre 61.50 5.77degPost 60.43 7.24deg
13 14 Y T Pre PostY Pre 8.02 0.67m/s Post 8.47 0.69m/s Post Pre
t=-4.908 p 0.0001 T Pre 8.85 0.64m/sPost 8.90 0.73m/s
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Y 30m 40mPost Pre T
Pre Post Y T PrePost
Y
Post PrePre Post
Y Post Pre Post Pre
Post PrePre Post
Y
Y 5 1 33 18 15 T6 1 38 20 18 71
4 1 Pre 4 Post 502 3 Y
T
Pre PostVTR 1
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44 Post Pre
Post Pre
Post PrePost Pre Pre Post
2001
46 179-194
1981 pp.162-163
2001 103 149-155
1979 1251-63
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