Abstract details
| Abstract-ID: | 1900 |
| Title of the paper: | The shuttlecock velocity adjustment strategy in badminton backhand shots. |
| Authors: | Shimizu, M., Ozawa, Y., Yamada, H. |
| Institution: | Tokai University |
| Department: | Graduate School of Physical Education |
| Country: | Japan |
| Abstract text | INTRODUCTION: Badminton is a popular racket sport and requires players to hit slow and fast shots to take advantage in rallies. One of the most important shots in badminton is the drive shot. To use the drive shot effectively, players must adjust the velocity of hitting the shuttlecock. Identifying the shuttlecock velocity adjustment strategy in backhand drive would provide coaches with knowledge to assist them in providing appropriate instruction, but no research has been examined from this perspective. Therefore, this study aimed to identify differences between skilled and unskilled players with regard to strategies for controlling shuttlecock velocity on the backhand drive. METHODS: Ten male college badminton players (Age: 19.4 ± 1.0 year, height: 173.3 ± 4.5 cm, Weight: 64.2 ± 3.8 kg, Experience: 10.5 ± 1.4 year) and ten adult men with no experience in badminton (Age: 21.5 ± 0.6 year, height: 173.5 ± 5.0 cm, Weight: 64.5 ± 9.7 kg) are volunteered for this study. Participants performed backhand drives in the sitting position. Participants were instructed to control the shuttlecock velocity with effort (from 60% to 100%). Upper limb movement and shuttlecock trajectory were recorded with a motion capture system (Mac3D, Motion Analysis Co., USA). Shuttlecock velocity and upper limb joint (elbow extension, forearm supination, and wrist flexion) angular velocity were calculated for each effort level. Data were compared within each proficiency level using repeated measures of one-way analysis of variance (ANOVA) with effort level as a factor; when appropriate multiple comparison tests using Holms method were performed for items. The significance level was set at p < 0.05. RESULTS: In skilled participants, shuttle velocity was significantly higher at the higher effort levels across all effort levels (p < 0.05) except between the 70%-80% (p = 0.060) and 80%-90% (p = 0.060) effort levels. Maximum angular velocity in the elbow and wrist were significantly higher depending on effort levels (p < 0.05). In contrast, shuttle velocity in unskilled participants was significantly higher at the higher effort levels across all effort levels (p < 0.05) except between 60%-70% (p = 0.742), 70%-80% (p = 0.058), and 60%-80% (p = 0.233). The forearm and wrist maximum angular velocity increased depending on shuttle velocity in unskilled participants (p < 0.05). CONCLUSION: Skilled participants adjusted the shuttlecock velocity appropriately by adjusting the angular velocity of the elbow and wrist joints. Unskilled participants attempted to adjust the shuttlecock velocity appropriately by adjusting the angular velocity of the forearm and wrist joints. However, the unskilled could not properly control the joint angular velocity at low effort levels. As a result, the unskilled could not also control the shuttlecock velocity. In conclusion, it was found that skilled participants and unskilled participants swung with different shuttlecock velocity adjustment strategies. |
| Topic: | Biomechanics |
| Keyword I: | |
| Keyword II: | |
| Keyword III: | |