| Keywords |
Muscle fatigue ; Heart rate ; EEG ; Pistol shooting |
| Abstract |
The purpose of this study was to investigate the effects of upper extremity muscle fatigue on the heart rate and EEG during a pistol shooting. Eight elite male players (27.1 ± 2.7 yrs, 77.0 ± 3.6 kg, 172.6 ± 2.0 cm) with members of the national team volunteered for this study. The exercise repetitions for upper-extremity fatigue was individually determined at isokinetic machine at 7 days prior to experimental day. The isokinetic exercise was performed until the constant level of work output at speed of 120 °/sec and the range of 10o ~ 100o. At the experimental day, all subjects performed the 3-set fatigue exercises with 60s resting interval between sets and then immediately started the 10-m pistol shooting with 20 shoots for 300s at the coach machine with heart rate and EEG monitors. The shooting time and the aiming period were significantly decreased but the aiming distance was significantly increased after exercise when compared with those of non-fatigue status (p < 0.05). The fluctuation of heart rate was significantly increased during shooing performance (p < 0.05). The alpha wave at T3 of EEG was significantly elevated after fatigue exercise, but not at T4 of EEG. Therefore, the study showed that the upper extremity muscle increased heart rate and T3 with deteriorating shooting performance. |