{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T00:59:50Z","timestamp":1760057990594,"version":"build-2065373602"},"reference-count":51,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,3,5]],"date-time":"2025-03-05T00:00:00Z","timestamp":1741132800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JFMK"],"abstract":"<jats:p>Background\/Objectives: This study aimed to determine the relationships between seven descriptors of movement proficiency used by an expert to grade an athlete\u2019s single-leg squat and the overall subjective \u2018grade\u2019 and the ability to predict a \u2018grade\u2019 based on the descriptors. A secondary aim was to determine the relationships between biomechanical data, the expert-defined descriptors, and the subjective \u2018grade\u2019 and its ability to predict the descriptors\u2019 presence and the overall \u2018grade\u2019. Methods: Single-leg squats in 55 male athletes were graded using expert evaluation, synchronized video, biomechanical data, and decision tree and logistic regression analysis. Results: The model that most accurately predicted \u2018grade\u2019 (94.7%) was a decision tree with the descriptors as inputs. The model with biomechanical data for the descriptor \u2018foot\u2019 was the most accurate one (96.3%), followed by \u2018lumbar\u2019 and \u2018depth\u2019 (85.2%), \u2018knee\u2019 (81.2%), \u2018pelvis\/hip\u2019 (71.7%), and \u2018trunk\u2019 (62.3%). These accuracies followed similar order to the intra-rater agreement: \u2018foot\u2019 (0.789), \u2018lumbar\u2019 (0.776), \u2018knee\u2019 (0.725), \u2018depth\u2019 (0.682), \u2018pelvis\/hip\u2019 (0.662), and \u2018trunk\u2019 (0.637), indicating that \u2018trunk\u2019, \u2018pelvis\/hip\u2019, and \u2018depth\u2019 are potentially the hardest descriptors to assess by the expert. Conclusions: The models developed in this study demonstrate that subjective perceptions can be somewhat accurately explained through a small number of biomechanical indicators. The results of this study support the notion that human movement evaluations should consider both subjective and objective assessments in a complementary manner to accurately evaluate an athlete\u2019s movement proficiency.<\/jats:p>","DOI":"10.3390\/jfmk10010086","type":"journal-article","created":{"date-parts":[[2025,3,5]],"date-time":"2025-03-05T05:54:38Z","timestamp":1741154078000},"page":"86","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Implementation of a Decision Support System to Enhance Movement Proficiency Assessment in Sport"],"prefix":"10.3390","volume":"10","author":[{"given":"Xavier","family":"Schelling","sequence":"first","affiliation":[{"name":"Institute for Health and Sport (iHeS), Victoria University, Melbourne, VIC 8001, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8678-8702","authenticated-orcid":false,"given":"Enrique","family":"Alonso-Perez-Chao","sequence":"additional","affiliation":[{"name":"Department of Physical Activity and Sports Science, University Alfonso X el Sabio, 28691 Villanueva de la Ca\u00f1ada, Spain"},{"name":"Department of Physiotherapy, Faculty of Medicine, Health and Sports, European University of Madrid, 28001 Villaviciosa de Od\u00f3n, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sam","family":"Robertson","sequence":"additional","affiliation":[{"name":"Institute for Health and Sport (iHeS), Victoria University, Melbourne, VIC 8001, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"McIntosh, S., Kovalchik, S., and Robertson, S. (2019). Comparing subjective and objective evaluations of player performance in Australian Rules football. PLoS ONE, 14.","DOI":"10.1371\/journal.pone.0220901"},{"key":"ref_2","first-page":"32","article-title":"Science or Coaches\u2019 Eye?\u2014Both! Beneficial Collaboration of Multidimensional Measurements and Coach Assessments for Efficient Talent Selection in Elite Youth Football","volume":"18","author":"Sieghartsleitner","year":"2019","journal-title":"J. Sports Sci. Med."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1163","DOI":"10.1016\/j.jsams.2019.05.008","article-title":"Coach knowledge in talent identification: A systematic review and meta-synthesis","volume":"22","author":"Roberts","year":"2019","journal-title":"J. Sci. Med. Sport"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1","DOI":"10.2478\/ijcss-2020-0001","article-title":"A development framework for decision support systems in high-performance sport","volume":"19","author":"Schelling","year":"2020","journal-title":"Int. J. Comput. Sci. Sport"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1123\/jsr.2015-0102","article-title":"The Relationship Between 2-Dimensional Knee-Valgus Angles During Single-Leg Squat, Single-Leg-Land, and Drop-Jump Screening Tests","volume":"26","author":"Munro","year":"2017","journal-title":"J. Sport. Rehabil."},{"key":"ref_6","first-page":"402","article-title":"Functional performance testing of the hip in athletes: A systematic review for reliability and validity","volume":"7","author":"Kivlan","year":"2012","journal-title":"Int. J. Sports Phys. Ther."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1016\/j.pmrj.2014.08.361","article-title":"Single leg squat test and its relationship to dynamic knee valgus and injury risk screening","volume":"7","author":"Ugalde","year":"2015","journal-title":"Pm R"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Richter, C., King, E., Strike, S., and Franklyn-Miller, A. (2018). Analyzing Human Movements\u2014Introducing A Framework To Extract And Evaluate Biomechanical Data. bioRxiv.","DOI":"10.1101\/442087"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1177\/002029401204500604","article-title":"Measurement in Sports Biomechanics","volume":"45","author":"Hood","year":"2012","journal-title":"Meas. + Control."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1186\/s40798-022-00432-z","article-title":"Integrative Proposals of Sports Monitoring: Subjective Outperforms Objective Monitoring","volume":"8","author":"Montull","year":"2022","journal-title":"Sports Med.\u2014Open"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"88","DOI":"10.11648\/j.ijsedu.s.2015030601.14","article-title":"Methods of Biomechanical Analyses in Sports","volume":"3","author":"Rugai","year":"2015","journal-title":"Int. J. Second. Educ."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"424","DOI":"10.26603\/ijspt20190424","article-title":"Reliability of a movement quality assessment tool to guide exercise prescription (MOVEMENTSCREEN)","volume":"14","author":"Bennett","year":"2019","journal-title":"Int. J. Sports Phys. Ther."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1661","DOI":"10.1136\/bjsports-2016-096938","article-title":"Do Functional Movement Screen (FMS) composite scores predict subsequent injury? A systematic review with meta-analysis","volume":"51","author":"Moran","year":"2017","journal-title":"Br. J. Sports Med."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"776","DOI":"10.1136\/bjsports-2016-096256","article-title":"Why screening tests to predict injury do not work-and probably never will\u2026: A critical review","volume":"50","author":"Bahr","year":"2016","journal-title":"Br. J. Sports Med."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"492","DOI":"10.1177\/0363546504269591","article-title":"Biomechanical measures of neuromuscular control and valgus loading of the knee predict anterior cruciate ligament injury risk in female athletes: A prospective study","volume":"33","author":"Hewett","year":"2005","journal-title":"Am. J. Sports Med."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"874","DOI":"10.1177\/0363546515625048","article-title":"The Vertical Drop Jump Is a Poor Screening Test for ACL Injuries in Female Elite Soccer and Handball Players: A Prospective Cohort Study of 710 Athletes","volume":"44","author":"Krosshaug","year":"2016","journal-title":"Am. J. Sports Med."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1080\/02640419408732156","article-title":"The future of performance-related sports biomechanics research","volume":"12","author":"Yeadon","year":"1994","journal-title":"J. Sports Sci."},{"key":"ref_18","first-page":"8","article-title":"Benefits of IMU-based Wearables in Sports Medicine: Narrative Review","volume":"10","author":"Arlotti","year":"2022","journal-title":"Int. J. Kinesiol. Sports Sci."},{"key":"ref_19","unstructured":"Simon, H.A. (2018, July 15). Rational decision-making in business organizations. Nobel Memorial Lecture, Available online: http:\/\/nobelprize.org\/nobel_prizes\/economics\/laureates\/1978\/simon-lecture.pdf."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1124","DOI":"10.1126\/science.185.4157.1124","article-title":"Judgment under uncertainty: Heuristics and biases","volume":"185","author":"Tversky","year":"1974","journal-title":"Science"},{"key":"ref_21","first-page":"154","article-title":"I spy with my little eye \u2026 a knee about to go \u2018pop\u2019? Can coaches and sports medicine professionals predict who is at greater risk of ACL rupture?","volume":"54","author":"Krosshaug","year":"2019","journal-title":"Br. J. Sports Med."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"2257","DOI":"10.1080\/02640414.2016.1265143","article-title":"Inconsistency of decision-making, the Achilles heel of referees","volume":"35","author":"Nevill","year":"2017","journal-title":"J. Sports Sci."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Hill, M., Scott, S., Malina, R.M., McGee, D., and Cumming, S.P. (2019). Relative age and maturation selection biases in academy football. Science and Football, Routledge.","DOI":"10.1080\/02640414.2019.1649524"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1016\/S0079-6123(09)01302-8","article-title":"On the relativity of athletic performance: A comparison perspective on performance judgments in sports","volume":"174","author":"Damisch","year":"2009","journal-title":"Prog. Brain Res."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1017\/S1931436100001152","article-title":"An Examination of Judge Reliability at a major U.S. Wine Competition","volume":"3","author":"Hodgson","year":"2008","journal-title":"J. Wine Econ."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"779","DOI":"10.1177\/0956797617744517","article-title":"Do Evaluations Rise With Experience?","volume":"29","author":"Cheema","year":"2018","journal-title":"Psychol. Sci."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"198","DOI":"10.1108\/IJCS-03-2019-0012","article-title":"Collective hybrid intelligence: Towards a conceptual framework","volume":"3","author":"Moradi","year":"2019","journal-title":"Int. J. Crowd Sci."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1121","DOI":"10.1055\/s-0035-1565186","article-title":"Ethical Standards in Sport and Exercise Science Research: 2016 Update","volume":"36","author":"Harriss","year":"2015","journal-title":"Int. J. Sports Med."},{"key":"ref_29","unstructured":"Innovative Sports Training, Inc. (2024, May 01). The MotionMonitor Subject Setup using Digitization Method. Available online: https:\/\/www.youtube.com\/watch?v=UuRYLsGz8Hs."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"25","DOI":"10.2478\/hukin-2013-0065","article-title":"Digital filtering of three-dimensional lower extremity kinematics: An assessment","volume":"39","author":"Sinclair","year":"2013","journal-title":"J. Hum. Kinet."},{"key":"ref_31","first-page":"201","article-title":"Not all single leg squats are equal: A biomechanical comparison of three variations","volume":"11","author":"Khuu","year":"2016","journal-title":"Int. J. Sports Phys. Ther."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1037\/h0026256","article-title":"Weighted kappa: Nominal scale agreement with provision for scaled disagreement or partial credit","volume":"70","author":"Cohen","year":"1968","journal-title":"Psychol. Bull."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1177\/001316446002000104","article-title":"A Coefficient of Agreement for Nominal Scales","volume":"20","author":"Cohen","year":"1960","journal-title":"Educ. Psychol. Meas."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"159","DOI":"10.2307\/2529310","article-title":"The measurement of observer agreement for categorical data","volume":"33","author":"Landis","year":"1977","journal-title":"Biometrics"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1080\/08839510902872223","article-title":"An empirical comparison of techniques for handeling incomplete data using decision trees","volume":"23","author":"Twala","year":"2009","journal-title":"Appl. Artif. Intell."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1007\/BF02294361","article-title":"Model selection and Akaike\u2019s Information Criterion (AIC): The general theory and its analytical extensions","volume":"52","author":"Bozdogan","year":"1987","journal-title":"Psychometrika"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Ribeiro, M.T., Singh, S., and Guestrin, C. (2016, January 13\u201317). Why should i trust you?: Explaining the predictions of any classifier. Proceedings of the 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, San Francisco, CA, USA.","DOI":"10.1145\/2939672.2939778"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"c94","DOI":"10.1159\/000312871","article-title":"Selection bias and information bias in clinical research","volume":"115","author":"Tripepi","year":"2010","journal-title":"Nephron Clin. Pract."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1016\/j.dr.2013.08.003","article-title":"Sampling in Developmental Science: Situations, Shortcomings, Solutions, and Standards","volume":"33","author":"Bornstein","year":"2013","journal-title":"Dev. Rev. DR"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"8","DOI":"10.5964\/ejop.v15i1.1691","article-title":"Individual Differences in Anchoring Effect: Evidence for the Role of Insufficient Adjustment","volume":"15","year":"2019","journal-title":"Eur. J. Psychol."},{"key":"ref_41","unstructured":"Pappalardo, L., Cintia, P., Pedreschi, D., Giannotti, F., and Barabasi, A.L. (2017). Human Perception of Performance. arXiv."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"491","DOI":"10.2519\/jospt.2012.3987","article-title":"Trunk, pelvis, hip, and knee kinematics, hip strength, and gluteal muscle activation during a single-leg squat in males and females with and without patellofemoral pain syndrome","volume":"42","author":"Nakagawa","year":"2012","journal-title":"J. Orthop. Sports Phys. Ther."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"866","DOI":"10.1177\/0363546510395456","article-title":"Performance on the single-leg squat task indicates hip abductor muscle function","volume":"39","author":"Crossley","year":"2011","journal-title":"Am. J. Sports Med."},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Loffing, F., Hagemann, N., Strauss, B., and MacMahon, C. (2016). Skill acquisition in left- and right-handed athletes: Insights from elite coaching. Laterality in Sports: Theories and Applications, Elsevier.","DOI":"10.1016\/B978-0-12-801426-4.00001-8"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1192","DOI":"10.1109\/SURV.2012.110112.00192","article-title":"A Survey on Human Activity Recognition using Wearable Sensors","volume":"15","author":"Lara","year":"2013","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Payton, C.J., and Burden, A. (2018). Assessing Movement Coordination, in Biomechanical Evaluation of Movement in Sport and Exercise, Taylor & Francis.","DOI":"10.4324\/9780203095546"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"2060","DOI":"10.1007\/s00167-011-1542-9","article-title":"Reliability and reference values of two clinical measurements of dynamic and static knee position in healthy children","volume":"19","author":"Roos","year":"2011","journal-title":"Knee Surg. Sports Traumatol. Arthrosc."},{"key":"ref_48","first-page":"83","article-title":"Towards the deep, knowledge-based interoperability of applications","volume":"79","author":"Gudas","year":"2017","journal-title":"Inf. Moksl."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"90","DOI":"10.1287\/inte.33.5.90.19251","article-title":"Forecasting software in practice: Use, satisfaction, and performance","volume":"33","author":"Sanders","year":"2003","journal-title":"Interfaces"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"449","DOI":"10.1177\/03635465030310032101","article-title":"Differences in Kinematics and Electromyographic Activity between Men and Women during the Single-Legged Squat","volume":"31","author":"Zeller","year":"2003","journal-title":"Am. J. Sports Med."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"945","DOI":"10.1249\/01.mss.0000218140.05074.fa","article-title":"Core Strength and Lower Extremity Alignment during Single Leg Squats","volume":"38","author":"Willson","year":"2006","journal-title":"Med. Sci. Sports Exerc."}],"container-title":["Journal of Functional Morphology and Kinesiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2411-5142\/10\/1\/86\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T16:47:23Z","timestamp":1760028443000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2411-5142\/10\/1\/86"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,3,5]]},"references-count":51,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2025,3]]}},"alternative-id":["jfmk10010086"],"URL":"https:\/\/doi.org\/10.3390\/jfmk10010086","relation":{},"ISSN":["2411-5142"],"issn-type":[{"type":"electronic","value":"2411-5142"}],"subject":[],"published":{"date-parts":[[2025,3,5]]}}}