| Summary: | 碩士 === 國立臺南大學 === 體育學系教學碩士班 === 98 === The purpose of this study is to investigate the effect on reaction time and movement time for the interceptive task in football with fast/slow ball speed and dominant leg/non-dominant leg. Participants were 32 elite male players (aged 16.53±0.67 year, height 172.94±5.30 cm, weight 65.41±7.53 kg).The main equipment consisted of two infrared sensors (CRD-300N), 3-axis accelerometers(+3g，1000Hz), and two EMG electrodes(500 Hz).The infrared sensors obtained the data for ball speed and the point of time when the ball was kicked. EMG electrodes (500 Hz) were placed on the quadriceps of thigh, and the 3-axis accelerometers(+3g，1000Hz) were attached on the feet. All the signals were collected and analyzed into the parameters of reaction time simultaneously by LabVIEW system (1000Hz).
The parameters included pre-motor reaction time (PRT) which is the duration from the ball kicked by the coach to the onset signal of EMG in the supporting foot, motor reaction time (MRT) which is the duration from the onset signal of EMG in the supporting foot to the onset signal of accelerometer in the interceptive foot, reaction time (RT) which is the duration from the ball kicked by the coach to the onset signal of accelerometer in the interceptive foot ,and movement time (MT) which is the duration from the onset signal of accelerometer to the moment that ball was blocked. Two-way ANOVA of repeated measurement (α=.05) was used to test the results, the findings were indicated as the followings:
1.The interaction between fast/slow ball speed and dominant leg/non-dominant leg had not
the significant difference (p<.05).
2. The PRT, MRT, RT differed significantly(p<.05) in ball speed factor. The value in fast ball
speed situation was faster than in slow ball speed. The MT had the significant difference
(p<.05) in ball speed factor. The MT value in fast ball speed situation was higher than in
slow speed situation.
3. Between dominant leg/non-dominant leg had not the significant difference in the RT and
MT (p<.05).
|
|---|
