Pub Date : 2022-10-01DOI: 10.1016/j.jsampl.2022.100001
Naoaki Ito , Haraldur B. Sigurðsson , Kayla D. Seymore , Elanna K. Arhos , Thomas S. Buchanan , Lynn Snyder-Mackler , Karin Grävare Silbernagel
Markerless motion capture (mocap) could be the future of motion analysis. The purpose of this report was to describe our team of clinicians and scientists’ exploration of markerless mocap (Theia 3D) and share data for others to explore (link: https://osf.io/6vh7z/?view_only=c0e00984e94a48f28c8d987a2127339d). Simultaneous mocap was performed using markerless and marker-based systems for walking, squatting, and forward hopping. Segment lengths were more variable between trials using markerless mocap compared to marker-based mocap. Sagittal plane angles were most comparable between systems at the knee joint followed by the ankle and hip. Frontal and transverse plane angles were not comparable between systems. The data collection experience using markerless mocap was simpler, faster, and user friendly. The ease of collection was in part offset by the added data transfer and processing times, and the lack of troubleshooting flexibility. If used selectively with proper understanding of limitations, markerless mocap can be exciting technology to advance the field of motion analysis.
{"title":"Markerless motion capture: What clinician-scientists need to know right now","authors":"Naoaki Ito , Haraldur B. Sigurðsson , Kayla D. Seymore , Elanna K. Arhos , Thomas S. Buchanan , Lynn Snyder-Mackler , Karin Grävare Silbernagel","doi":"10.1016/j.jsampl.2022.100001","DOIUrl":"10.1016/j.jsampl.2022.100001","url":null,"abstract":"<div><p>Markerless motion capture (mocap) could be the future of motion analysis. The purpose of this report was to describe our team of clinicians and scientists’ exploration of markerless mocap (Theia 3D) and share data for others to explore (link: <span>https://osf.io/6vh7z/?view_only=c0e00984e94a48f28c8d987a2127339d</span><svg><path></path></svg>). Simultaneous mocap was performed using markerless and marker-based systems for walking, squatting, and forward hopping. Segment lengths were more variable between trials using markerless mocap compared to marker-based mocap. Sagittal plane angles were most comparable between systems at the knee joint followed by the ankle and hip. Frontal and transverse plane angles were not comparable between systems. The data collection experience using markerless mocap was simpler, faster, and user friendly. The ease of collection was in part offset by the added data transfer and processing times, and the lack of troubleshooting flexibility. If used selectively with proper understanding of limitations, markerless mocap can be exciting technology to advance the field of motion analysis.</p></div>","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 ","pages":"Article 100001"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/37/62/nihms-1851313.PMC9699317.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40488145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-01DOI: 10.1016/j.jsampl.2022.100005
Anna Swärd Aminoff , Josefin Abrahamson , Carl Todd , Olof Thoreson , Cecilia Agnvall , Gauti Laxdal , Ricard Pruna , Pall Jonasson , Leif Swärd , Jón Karlsson , Adad Baranto
Objectives
To investigate hip pain, hip range of motion and the presence and size of cam morphology among young soccer players and skiers.
Design
Cross-sectional study.
Methods
The hip joints of young male soccer players and male and female skiers were examined clinically for hip range of motion (ROM) and with MRI (the presence of cam morphology). All participants answered questions about hip pain, debut age for training/competing and training frequency.
Results
Clinical examinations were performed on 135 athletes (60 male soccer players, 40 male skiers and 35 female skiers), of which 93 athletes had additional MRIs. Mean age was 17.7 (SD 1.2) years. Cam morphology (α-angle ≥60°) was significantly less present in female skiers (3%) compared with male skiers (38%, p < 0.001) and male soccer players (33%, p = 0.03). The soccer players had significantly reduced internal and external hip rotation and self-reported hip pain, compared with the skiers. Female skiers had significantly greater hip ROM, compared with both male skiers and soccer players. A low positive correlation was found between cam morphology and hip pain in male skiers (r = 0.42; p = 0.014).
Conclusions
Female skiers had a lower prevalence of cam morphology compared with the male groups while no difference was found between the male skiers and soccer players. Young male soccer players had significantly reduced internal and external hip rotation and a lower grade of self-reported hip pain compared with male and female skiers.
{"title":"Cam morphology, hip range of motion and hip pain in young skiers and soccer players","authors":"Anna Swärd Aminoff , Josefin Abrahamson , Carl Todd , Olof Thoreson , Cecilia Agnvall , Gauti Laxdal , Ricard Pruna , Pall Jonasson , Leif Swärd , Jón Karlsson , Adad Baranto","doi":"10.1016/j.jsampl.2022.100005","DOIUrl":"10.1016/j.jsampl.2022.100005","url":null,"abstract":"<div><h3>Objectives</h3><p>To investigate hip pain, hip range of motion and the presence and size of cam morphology among young soccer players and skiers.</p></div><div><h3>Design</h3><p>Cross-sectional study.</p></div><div><h3>Methods</h3><p>The hip joints of young male soccer players and male and female skiers were examined clinically for hip range of motion (ROM) and with MRI (the presence of cam morphology). All participants answered questions about hip pain, debut age for training/competing and training frequency.</p></div><div><h3>Results</h3><p>Clinical examinations were performed on 135 athletes (60 male soccer players, 40 male skiers and 35 female skiers), of which 93 athletes had additional MRIs. Mean age was 17.7 (SD 1.2) years. Cam morphology (α-angle ≥60°) was significantly less present in female skiers (3%) compared with male skiers (38%, p < 0.001) and male soccer players (33%, p = 0.03). The soccer players had significantly reduced internal and external hip rotation and self-reported hip pain, compared with the skiers. Female skiers had significantly greater hip ROM, compared with both male skiers and soccer players. A low positive correlation was found between cam morphology and hip pain in male skiers (r = 0.42; p = 0.014).</p></div><div><h3>Conclusions</h3><p>Female skiers had a lower prevalence of cam morphology compared with the male groups while no difference was found between the male skiers and soccer players. Young male soccer players had significantly reduced internal and external hip rotation and a lower grade of self-reported hip pain compared with male and female skiers.</p></div>","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 ","pages":"Article 100005"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772696722000059/pdfft?md5=1dfc81ef142873dd6dcea353c2feeedf&pid=1-s2.0-S2772696722000059-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42536174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1016/j.jsampl.2023.100032
L. Noteboom, E. Kemler, A. van Beijsterveldt, M. Hoozemans, F. V. D. van der Helm, E. Verhagen
{"title":"Factors associated with gym-based fitness injuries: A case-control study","authors":"L. Noteboom, E. Kemler, A. van Beijsterveldt, M. Hoozemans, F. V. D. van der Helm, E. Verhagen","doi":"10.1016/j.jsampl.2023.100032","DOIUrl":"https://doi.org/10.1016/j.jsampl.2023.100032","url":null,"abstract":"","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54711117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1016/j.jsampl.2023.100034
Michael Zwölfer, Dieter Heinrich, K. Schindelwig, Bastian Wandt, Helge Rhodin, Jörg Spörri, W. Nachbauer
{"title":"Deep learning-based 2D keypoint detection in alpine ski racing – A performance analysis of state-of-the-art algorithms applied to regular skiing and injury situations","authors":"Michael Zwölfer, Dieter Heinrich, K. Schindelwig, Bastian Wandt, Helge Rhodin, Jörg Spörri, W. Nachbauer","doi":"10.1016/j.jsampl.2023.100034","DOIUrl":"https://doi.org/10.1016/j.jsampl.2023.100034","url":null,"abstract":"","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54711143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1016/j.jsampl.2023.100036
M. Dorsemaine, Irving S. Scher, Tom Allen, Catherine Masson, L. Stepan, P. Arnoux
{"title":"Recommendations to improve ski area safety with obstacle padding","authors":"M. Dorsemaine, Irving S. Scher, Tom Allen, Catherine Masson, L. Stepan, P. Arnoux","doi":"10.1016/j.jsampl.2023.100036","DOIUrl":"https://doi.org/10.1016/j.jsampl.2023.100036","url":null,"abstract":"","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54711164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1016/j.jsampl.2023.100025
S. Niemann, F. Bürgi, O. Brügger
{"title":"Helmet use in skiing and snowboarding in Switzerland during the past 20 years","authors":"S. Niemann, F. Bürgi, O. Brügger","doi":"10.1016/j.jsampl.2023.100025","DOIUrl":"https://doi.org/10.1016/j.jsampl.2023.100025","url":null,"abstract":"","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54711518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1016/j.jsampl.2023.100035
M. Murphy, Simone Radavelli-Bagatini, G. Allen, Nicolas H. Hart, Andrea B. Mosler
{"title":"Essential reporting items within a law enforcement recruit injury and physical performance database: A modified Delphi study","authors":"M. Murphy, Simone Radavelli-Bagatini, G. Allen, Nicolas H. Hart, Andrea B. Mosler","doi":"10.1016/j.jsampl.2023.100035","DOIUrl":"https://doi.org/10.1016/j.jsampl.2023.100035","url":null,"abstract":"","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54711154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1016/j.jsampl.2023.100023
G. Leslie, K. Winwood, Weizhuo Wang, N. Hamilton, T. Allen
{"title":"Effect of limb surrogate surface compliance on the impact response of wrist protectors","authors":"G. Leslie, K. Winwood, Weizhuo Wang, N. Hamilton, T. Allen","doi":"10.1016/j.jsampl.2023.100023","DOIUrl":"https://doi.org/10.1016/j.jsampl.2023.100023","url":null,"abstract":"","PeriodicalId":74029,"journal":{"name":"JSAMS plus","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54711494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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