A simple approximate theory of snow machining is applied to modelling successive wedge turns of alpine skiing. The model involves predefined control functions describing skier’s control over the turns via angle of attack, edge angle and loading of the skis. To demonstrate the model’s potential, reasonable control functions with a small number of free parameters are designed and used in attempt to reproduce the data obtained in a previous field study by other researches. The results are in semi-quantitative agreement with the data. In particular, the model explains the nature of the abnormally high values for the “coefficient of friction” deduced in that study. Future field studies of wedge turns should aim at measuring the angle of attack, edge angle and loading of the skis. This will allow to determine the control functions from the experimental data and hence to conduct a more stringent verification of the model.
{"title":"Mechanics of wedge turns in alpine skiing","authors":"S. Komissarov","doi":"10.31236/osf.io/qv6j5","DOIUrl":"https://doi.org/10.31236/osf.io/qv6j5","url":null,"abstract":"A simple approximate theory of snow machining is applied to modelling successive wedge turns of alpine skiing. The model involves predefined control functions describing skier’s control over the turns via angle of attack, edge angle and loading of the skis. To demonstrate the model’s potential, reasonable control functions with a small number of free parameters are designed and used in attempt to reproduce the data obtained in a previous field study by other researches. The results are in semi-quantitative agreement with the data. In particular, the model explains the nature of the abnormally high values for the “coefficient of friction” deduced in that study. Future field studies of wedge turns should aim at measuring the angle of attack, edge angle and loading of the skis. This will allow to determine the control functions from the experimental data and hence to conduct a more stringent verification of the model.","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":"25 1","pages":"1-11"},"PeriodicalIF":1.7,"publicationDate":"2020-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48744903","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 : 2020-07-06DOI: 10.1007/s12283-020-00327-w
G. Millour, S. Duc, F. Puel, W. Bertucci
{"title":"Effect of asymmetric crank arm lengths on performance-related variables in cyclists with an anatomical lower limb length discrepancy","authors":"G. Millour, S. Duc, F. Puel, W. Bertucci","doi":"10.1007/s12283-020-00327-w","DOIUrl":"https://doi.org/10.1007/s12283-020-00327-w","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":"23 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-020-00327-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52713375","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 : 2020-05-25DOI: 10.1007/s12283-020-00323-0
J. M. Clark, C. Williams, Jonathan Clissold, A. McGoldrick, Jerry Hill, A. N. Annaidh, M. Gilchrist
{"title":"Video analysis of head injury incidents in equestrian sports","authors":"J. M. Clark, C. Williams, Jonathan Clissold, A. McGoldrick, Jerry Hill, A. N. Annaidh, M. Gilchrist","doi":"10.1007/s12283-020-00323-0","DOIUrl":"https://doi.org/10.1007/s12283-020-00323-0","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":"23 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-020-00323-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52713298","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 : 2020-04-18DOI: 10.1007/s12283-020-00337-8
J. L. Herold, Andreas Sommer
{"title":"A mathematical model-based approach to optimize loading schemes of isometric resistance training sessions","authors":"J. L. Herold, Andreas Sommer","doi":"10.1007/s12283-020-00337-8","DOIUrl":"https://doi.org/10.1007/s12283-020-00337-8","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":"24 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43811971","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 : 2020-03-19DOI: 10.1007/s12283-020-0320-7
Josh Turner, S. Forrester, Aimée C. Mears, J. Roberts
{"title":"Reliability of repeat golf club testing sessions with modified club moment of inertia","authors":"Josh Turner, S. Forrester, Aimée C. Mears, J. Roberts","doi":"10.1007/s12283-020-0320-7","DOIUrl":"https://doi.org/10.1007/s12283-020-0320-7","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-020-0320-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45483671","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 : 2020-02-06DOI: 10.1007/s12283-020-0318-1
Bin Lyu, Jeffery R. Kensrud, Lloyd V. Smith
{"title":"The reverse Magnus effect in golf balls","authors":"Bin Lyu, Jeffery R. Kensrud, Lloyd V. Smith","doi":"10.1007/s12283-020-0318-1","DOIUrl":"https://doi.org/10.1007/s12283-020-0318-1","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":"23 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-020-0318-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52714069","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 : 2019-12-07DOI: 10.1007/s12283-019-0313-6
I. Gatt, T. Allen, J. Wheat
{"title":"Accuracy and repeatability of wrist joint angles in boxing using an electromagnetic tracking system","authors":"I. Gatt, T. Allen, J. Wheat","doi":"10.1007/s12283-019-0313-6","DOIUrl":"https://doi.org/10.1007/s12283-019-0313-6","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2019-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-019-0313-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46306235","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 : 2019-11-27DOI: 10.1007/s12283-019-0315-4
Manuel Gerth, Matthias Haecker, P. Kohmann
{"title":"Influence of mountain bike riding velocity, braking and rider action on pedal kickback","authors":"Manuel Gerth, Matthias Haecker, P. Kohmann","doi":"10.1007/s12283-019-0315-4","DOIUrl":"https://doi.org/10.1007/s12283-019-0315-4","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":"23 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2019-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-019-0315-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41589358","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 : 2019-11-13DOI: 10.1007/s12283-019-0314-5
William J. McNally, E. Henrikson, J. McPhee
{"title":"A continuous analytical shaft model for fast dynamic simulation of the golf swing","authors":"William J. McNally, E. Henrikson, J. McPhee","doi":"10.1007/s12283-019-0314-5","DOIUrl":"https://doi.org/10.1007/s12283-019-0314-5","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2019-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-019-0314-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44721186","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 : 2019-10-10DOI: 10.1007/s12283-019-0312-7
Derek Nevins, Lloyd V. Smith, Philip G. Petersen
{"title":"An improved method for obtaining rotational accelerations from instrumented headforms","authors":"Derek Nevins, Lloyd V. Smith, Philip G. Petersen","doi":"10.1007/s12283-019-0312-7","DOIUrl":"https://doi.org/10.1007/s12283-019-0312-7","url":null,"abstract":"","PeriodicalId":46387,"journal":{"name":"Sports Engineering","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2019-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12283-019-0312-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47591074","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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