Author(s): Debasish Mandal and Ashoke Kumar Biswas

Abstract:
The aim of this study was to find out the length of acceleration phase, maximum speed and average speed of different age group of girls’ student during 50m run. Total 60 girls’ students from 10 to 15 years were selected as subject for the present study. All the students were divided into three equal age groups i.e., 10-11yrs., 12-13yrs. and 14-15yrs girls group. The data was collected from 50m performance of the subject and the total distance was divided into 5 equal zones. The length of Acceleration Phase was extended (0-35m) for both girls groups i.e., 10-11 yrs. and 12-13 yrs. girls group but it was extended (0-25m) for 14-15yrs. girls group. The maximum speed of all three girls group i.e., 10-11 yrs., 12-13 yrs. & 14-15 yrs. girls were 6.01, 5.76 & 6.34 m/sec. and average speed were 5.48, 5.32 & 5.54 m/sec respectively. The schools going untrained girls have smaller acceleration zone and the length of acceleration zone decreased with increase of age. The maximum speed and average speed were increased with increase of age for 10-11 yrs. to 12-13 yrs. girls’ students but it was decreased with increase of age for 12-13 yrs. to 14-15 yrs. girls’ student.

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