Mechanical energy generation and transfer in the racket arm during table tennis topspin backhands
| Autor: | Takeji Kojima, Yoichi Iino |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
musculoskeletal diseases
Male Shoulder Physical Therapy Sports Therapy and Rehabilitation Inverse dynamics 03 medical and health sciences Backhand 0302 clinical medicine Racket medicine Humans Orthopedics and Sports Medicine Simulation Mechanical energy Mathematics computer.programming_language Torso 030229 sport sciences Swing Trunk Biomechanical Phenomena medicine.anatomical_structure Energy Transfer Tennis Arm Racquet Sports Shoulder joint human activities computer 030217 neurology & neurosurgery |
| Zdroj: | Sports biomechanics. 15(2) |
| ISSN: | 1752-6116 |
| Popis: | The ability to generate a high racket speed and a large amount of racket kinetic energy on impact is important for table tennis players. The purpose of this study was to understand how mechanical energy is generated and transferred in the racket arm during table tennis backhands. Ten male advanced right-handed table tennis players hit topspin backhands against pre-impact topspin and backspin balls. The joint kinetics at the shoulder, elbow and wrist of the racket arm was determined using inverse dynamics. A majority of the mechanical energy of the racket arm acquired during forward swing (65 and 77% against topspin and backspin, respectively) was due to energy transfer from the trunk. Energy transfer by the shoulder joint force in the vertical direction was the largest contributor to the mechanical energy of the racket arm against both spins and was greater against backspin than against topspin (34 and 28%, respectively). The shoulder joint force directed to the right, which peaked just before impact, transferred additional energy to the racket. Our results suggest that the upward thrust of the shoulder and the late timing of the axial rotation of the upper trunk are important for an effective topspin backhand. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|