A New Method for Evaluating Pelvic and Trunk Rotational Pitching Mechanics: From Qualitative to Quantitative Approaches
| Autor: | Cheng-Chang Lu, Hwai-Ting Lin, Yu-Chuan Lin, Fong-Chin Su, Chia-Lung Shih, Paul Pei-Hsi Chou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Shoulder
Flexibility (anatomy) baseball Rotation Computer science Health Toxicology and Mutagenesis Energy transfer STRIDE lcsh:Medicine Kinematics pelvis trunk Article 03 medical and health sciences 0302 clinical medicine medicine 030222 orthopedics Core (anatomy) lcsh:R Public Health Environmental and Occupational Health Torso 030229 sport sciences Mechanics Trunk Biomechanical Phenomena medicine.anatomical_structure kinematics Ball (bearing) Throwing performance |
| Zdroj: | International Journal of Environmental Research and Public Health, Vol 18, Iss 905, p 905 (2021) International Journal of Environmental Research and Public Health Volume 18 Issue 3 |
| ISSN: | 1661-7827 1660-4601 |
| Popis: | The purpose of this study was to build on existing qualitative to quantitative approaches to develop a new quantitative method for evaluating pelvic and trunk rotational pitching mechanics. Thirty pitchers were divided into two groups (&ldquo Pattern1&rdquo closed &ldquo hip-to-shoulder separation&rdquo &ldquo Pattern2&rdquo open &ldquo ). Several parameters were analyzed. Higher ball speeds were found in group of Pattern1, four key characteristics of which were identified. Based on the results, a new evaluation method was developed. Pelvic and trunk rotational mechanics were classified into four types. Type1 (proper mechanics) enabled significantly higher ball speed than the other three types and was thought to involve proper energy transfer from the stride foot to the throwing upper limb. Types 2&ndash 4, however, were regarded as &ldquo improper mechanics&rdquo which could result in slower ball speeds and less efficient energy transfer. A qualitative approach, based on &ldquo expert opinion&rdquo can specify optimal pelvis and trunk rotational mechanics. However, quantitative analysis is more precise in identifying three improper types of pelvis and trunk rotational mechanics. Furthermore, special programs, such as core strengthening and flexibility training, can be developed for various improper practices in order to improve pitching mechanics. |
| Databáze: | OpenAIRE |
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