{"title":"从投球机和投手打垒球:案例研究","authors":"J. Carboch, P. Smejkalova","doi":"10.32725/sk.2019.050","DOIUrl":null,"url":null,"abstract":"If a player faces a pitching machine, he/she cannot see some important cues before the ball release, which are available if the player hits the balls delivered from a pitcher. The aim is to find, if hitting balls delivered from a pitching machine or a pitcher affect the players swing timing in softball. This is a case study. The subject hit balls delivered from a pitcher and pitching machine. This action was recorded by a high-speed video camera (200 fps). The swing timing was significantly different in specific phases of the swing. The subject initiated her movement 0,24 s earlier when she faced the pitcher compared to the pitching machine (d = –0,90). T-tests revealed significant difference (p < 0,05) in the backswing and forward swing duration in the pitcher and pitching machine conditions. These differences show change in swing timing, which can affect he movement coordination. Because this is a case study, we can’t generalize the results, but coaches should be aware about these issues.","PeriodicalId":179970,"journal":{"name":"Studia Kinanthropologica","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hitting balls from a pitching machine and pitcher in softball: case study\",\"authors\":\"J. Carboch, P. Smejkalova\",\"doi\":\"10.32725/sk.2019.050\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"If a player faces a pitching machine, he/she cannot see some important cues before the ball release, which are available if the player hits the balls delivered from a pitcher. The aim is to find, if hitting balls delivered from a pitching machine or a pitcher affect the players swing timing in softball. This is a case study. The subject hit balls delivered from a pitcher and pitching machine. This action was recorded by a high-speed video camera (200 fps). The swing timing was significantly different in specific phases of the swing. The subject initiated her movement 0,24 s earlier when she faced the pitcher compared to the pitching machine (d = –0,90). T-tests revealed significant difference (p < 0,05) in the backswing and forward swing duration in the pitcher and pitching machine conditions. These differences show change in swing timing, which can affect he movement coordination. Because this is a case study, we can’t generalize the results, but coaches should be aware about these issues.\",\"PeriodicalId\":179970,\"journal\":{\"name\":\"Studia Kinanthropologica\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-09-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Studia Kinanthropologica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.32725/sk.2019.050\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Studia Kinanthropologica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.32725/sk.2019.050","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Hitting balls from a pitching machine and pitcher in softball: case study
If a player faces a pitching machine, he/she cannot see some important cues before the ball release, which are available if the player hits the balls delivered from a pitcher. The aim is to find, if hitting balls delivered from a pitching machine or a pitcher affect the players swing timing in softball. This is a case study. The subject hit balls delivered from a pitcher and pitching machine. This action was recorded by a high-speed video camera (200 fps). The swing timing was significantly different in specific phases of the swing. The subject initiated her movement 0,24 s earlier when she faced the pitcher compared to the pitching machine (d = –0,90). T-tests revealed significant difference (p < 0,05) in the backswing and forward swing duration in the pitcher and pitching machine conditions. These differences show change in swing timing, which can affect he movement coordination. Because this is a case study, we can’t generalize the results, but coaches should be aware about these issues.