{"created":"2024-10-02T06:13:34.243082+00:00","id":2000109,"links":{},"metadata":{"_buckets":{"deposit":"adbb95d4-01ad-4cdc-b422-938a80839c72"},"_deposit":{"created_by":10,"id":"2000109","owner":"10","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2000109"},"status":"published"},"_oai":{"id":"oai:kyukyo.repo.nii.ac.jp:02000109","sets":["6:1727758861957"]},"author_link":[],"control_number":"2000109","item_10002_biblio_info_7":{"attribute_name":"bibliographic_information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2024-09-30","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"50","bibliographicPageStart":"43","bibliographicVolumeNumber":"15","bibliographic_titles":[{"bibliographic_title":"九州共立大学研究紀要","bibliographic_titleLang":"ja"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The purpose of this study was to compare the muscle mass between right-handed and left-handed pitchers\nand to investigate the relationship between muscle mass and ball speed.\nThe subjects of this study were 67 male college baseball pitchers (49 right-handed pitchers and 18 lefthanded\npitchers). Body weight, body fat mass, lean body mass, skeletal muscle mass, and the muscle mass of the\nupper limbs, trunk, and lower limbs were measured using a body composition analyzer. BMI, FFMI, and SMI were\ncalculated by dividing body weight, fat-free mass, and limb muscle mass by the square of height. The muscle\nthicknesses of 12 areas (forearm anterior, upper arm anterior and posterior, chest, subscapular region, abdomen,\nlateral abdomen, thigh anterior and posterior, and lower leg anterior and posterior) were measured using an\nultrasound diagnostic device. A speed gun was used to measure ball speed. The pitcher threw five maximum-effort\npitches to the catcher, and the highest value recorded was taken as the ball speed. To compare each measurement\nindex between right-handed and left-handed pitchers, an independent t-test was used. Additionally, Pearson's\ncorrelation coefficient was calculated to examine the relationship between each measurement index and ball speed.\nBall speed was significantly higher in right-handed pitchers compared to left-handed pitchers (Right-handed:\n136.6 ± 5.9 km/h, Left-handed: 132.2 ± 6.2 km/h). In right-handed pitchers, height, weight, fat-free mass, skeletal\nmuscle mass, and muscle mass in various areas (pitching arm, non-pitching arm, trunk, stride leg, and pivot leg)\nshowed significant correlations with ball speed. On the other hand, for left-handed pitchers, none of the metrics\nshowed a significant correlation with ball speed.\nIn the comparison of muscle thickness, right-handed pitchers showed significantly higher values than lefthanded\npitchers in the forearm anterior, upper arm posterior, and chest regions. In the relationship between muscle\nthickness and ball speed, right-handed pitchers showed significant correlations between ball speed and muscle\nthickness in the upper arm anterior and subscapular regions.\nIn conclusion, differences were observed between right-handed and left-handed pitchers in ball speed as well\nas in muscle mass and thickness of the upper limbs and trunk. In right-handed pitchers, correlations were observed\nbetween muscle mass and thickness in various regions and ball speed, whereas such correlations were not observed\nin left-handed pitchers. On the other hand, FFMI and SMI were suggested to be important factors in determining\nball speed for both right-handed and left-handed pitchers.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10002_full_name_3":{"attribute_name":"著者（英）","attribute_value_mlt":[{"names":[{"name":"Shin HASEGAWA","nameLang":"en"}]}]},"item_10002_identifier_registration":{"attribute_name":"identifier_registration","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15093/0002000109","subitem_identifier_reg_type":"JaLC"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"九州共立大学","subitem_publisher_language":"ja"}]},"item_10002_source_id_11":{"attribute_name":"item_10002_source_id_11","attribute_value_mlt":[{"subitem_source_identifier":"AA12533413","subitem_source_identifier_type":"NCID"}]},"item_10002_source_id_9":{"attribute_name":"item_10002_source_id_9","attribute_value_mlt":[{"subitem_source_identifier":"21860483","subitem_source_identifier_type":"PISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"長谷川　伸","creatorNameLang":"ja"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2024-10-02"}],"filename":"kiyo15-1-7.pdf","filesize":[{"value":"979 KB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"url":"https://kyukyo.repo.nii.ac.jp/record/2000109/files/kiyo15-1-7.pdf"},"version_id":"ae46c3fe-6674-4a5c-9142-6e3d5d4316ef"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"muscle mass","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"muscle thickness","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"ball speed","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"left-handed pitchers","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"item_resource_type","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"右投手と左投手における筋量の比較 −筋量と投球速度との関係について−","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"右投手と左投手における筋量の比較 −筋量と投球速度との関係について−","subitem_title_language":"ja"},{"subitem_title":"Comparison　of muscle mass between right-handed and left-handed pitchers. – Correlation between muscle mass and ball speed –","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"10","path":["1727758861957"],"pubdate":{"attribute_name":"公開日","attribute_value":"2024-10-02"},"publish_date":"2024-10-02","publish_status":"0","recid":"2000109","relation_version_is_last":true,"title":["右投手と左投手における筋量の比較 −筋量と投球速度との関係について−"],"weko_creator_id":"10","weko_shared_id":-1},"updated":"2024-10-07T04:20:13.650721+00:00"}