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Yildiz M, Akyildiz Z, Gunay M, Clemente FM. Relationship Between Training Load, Neuromuscular Fatigue, and Daily Well-Being in Elite Young Wrestlers. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2024; 95:303-312. [PMID: 37369136 DOI: 10.1080/02701367.2023.2198575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/26/2023] [Indexed: 06/29/2023]
Abstract
Purpose: This study investigated acute workload (wAW), chronic workload (wCW), acute: chronic workload ratio (wACWR), training monotony (wTM), perceived load training strain indicators (wTS), and countermove- ment jump (CMJ) as indicators of wellness in one season and defined weekly variations. In addition, we analyzed the relationships between training load measurements and weekly reports. Methods: 16 elite young wrestlers were monitored daily with individual observations for 46 consecutive weeks throughout the season. Training load was obtained using the session rating of perceived effort. wSleep, wStress, wFatigue & wMuscle Soreness well-being were monitored daily using the Hooper index. Results: As a result of the analysis, it was found that there is a moderate relationship (r = 0.51, p = .003) between ACWR and w mean load (A.U.) and a high relationship (r = 0.81, p < .001) between monotony and strain. Conclusion: All variables other than ACWR, w mean load, strain, and monotony presented small and statistically insignificant relationships. These results provide coaches and practitioners with new insights into perceived loads and health changes during a season at the elite youth level.
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Armitage M, McErlain-Naylor SA, Devereux G, Beato M, Iga J, McRobert A, Roberts S, Buckthorpe M. On-field rehabilitation in football: current practice and perceptions. A survey of the English Premier League and Football League. SCI MED FOOTBALL 2024:1-10. [PMID: 38456365 DOI: 10.1080/24733938.2024.2313529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/25/2024] [Indexed: 03/09/2024]
Abstract
INTRODUCTION Return to play related research is increasing rapidly, with two recent competency-based frameworks offering conceptualised support for on-field rehabilitation (OFR) decision-making. It is still unknown, however, who is responsible for OFR and how they typically select, monitor, and progress OFR processes. AIMS The purpose of this study was to investigate current OFR practice within English professional football to support practitioners with decision-making and highlight opportunities for future research related to the design, monitoring, and progression of OFR. METHODS Sixty-nine practitioners responsible for the design and implementation of OFR at 69 clubs (75% of the English Premier League and Football League) responded to a survey containing 30 questions (14 open and 16 closed). RESULTS The main findings were that therapists (physiotherapists/sports therapists) have the largest influence on OFR, followed by physical performance coaches (sports scientists/strength and conditioning coaches), technical coaches and medical doctors. There was more agreement for the ordering of specific OFR drills earlier in the process when activities are easier to control. The most frequently reported objective monitoring tool was global positioning systems (GPS), with functional/clinical experience/expertise remaining subjectively vital. GPS outputs (e.g., sprint metrics and accelerations/decelerations) were most used for between session decision-making, with verbal communication being key for within session decision-making. CONCLUSION Future research should use evidence of current practice, such as drill design and monitoring techniques, to explore drill-level analysis and give practitioners greater insights into which stage of current OFR frameworks specific drills fall, and how they might be more objectively progressed/regressed.
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Affiliation(s)
- Mark Armitage
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
- Faculty of Sport, Applied Health and Science, St Mary's University Twickenham, London, UK
- Performance Services Department, Ipswich Town Football Club, Ipswich, UK
| | - Stuart A McErlain-Naylor
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Gavin Devereux
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - John Iga
- Performance Services Department, Norwich City Football Club, Norwich, UK
| | - Allistair McRobert
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Simon Roberts
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Matt Buckthorpe
- Faculty of Sport, Applied Health and Science, St Mary's University Twickenham, London, UK
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Kelly S, Waring A, Stone B, Pollock N. Epidemiology of bone injuries in elite athletics: A prospective 9-year cohort study. Phys Ther Sport 2024; 66:67-75. [PMID: 38340615 DOI: 10.1016/j.ptsp.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 02/12/2024]
Abstract
OBJECTIVES To describe bone injury patterns in elite track and field athletes. To investigate relationships between bone injury and athlete characteristics to inform future injury prevention strategies. DESIGN Descriptive epidemiology study. SETTING Elite athletics training centres across the United Kingdom and internationally, observed between 2012 and 2020. PARTICIPANTS 207 Olympic programme senior track and field athletes. MAIN OUTCOME MEASURES Injury number, Incidence, Severity, Burden, Time Loss. RESULTS There were 78 fractures during the study period. Gradual repetitive bone injuries were the most common type of injury mode. The foot, pelvis and the lumbar spine were the regions with the highest number of bone stress injuries. Stress fractures had a higher burden overall compared to stress reactions. Average return to full training was 67.4 days (±73.1) for stress reactions and 199 (±205.2) days for stress fractures. There was no relationship between bone injury type and age, sex, ethnicity, side dominance or event group. CONCLUSION Bone stress injuries in athletics have a high severity and burden warranting continued efforts to prevent their occurrence and optimize management. Age, sex, ethnicity, side dominance and event region do not have any relationship with bone injury occurrence and are therefore unlikely to increase risk in this cohort.
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Affiliation(s)
- Shane Kelly
- Ballet Healthcare, The Royal Opera House, London, WC2E9DD, United Kingdom.
| | - Anthony Waring
- Fortius Clinic, 17 Fitzhardinge Street, London, W1H 6EQ, United Kingdom. https://twitter.com/Sport_Ex_Dr
| | - Ben Stone
- British Athletics, National Performance Institute (NPI), Loughborough, LE11 3TU, United Kingdom. https://twitter.com/B_W_Stone
| | - Noel Pollock
- Institute of Sport, Exercise and Health (ISEH), University College of London, London, W1T 7HA, United Kingdom. https://twitter.com/DrNoelPollock
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Dowling B, Brusalis CM, Streepy JT, Hodakowski A, Pauley PJ, Heidloff D, Garrigues GE, Verma NN, Fleisig GS. Workload Comparison of Contemporary Interval Throwing Programs and a Novel Optimized Program for Baseball Pitchers. Int J Sports Phys Ther 2024; 19:176-188. [PMID: 38313666 PMCID: PMC10837817 DOI: 10.26603/001c.92016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/16/2023] [Indexed: 02/06/2024] Open
Abstract
Background In the rehabilitation of injured baseball pitchers, there is lack of consensus on how to guide a player back to pitching. It is unknown how different contemporary interval throwing programs (ITPs) progress in the amount of throwing workload. Purposes To 1) evaluate three prominent ITPs commonly employed in baseball pitcher rehabilitation and assess whether these ITPs produce training loads that increase in a controlled, graduated manner and 2) devise an ITP that produced training loads which increased steadily over time. Study Design Cross-sectional study. Methods Three publicly available ITPs from prominent sports medicine institutions were analyzed. Elbow varus torque per throw was calculated from a 2nd order polynomial regression based upon a relationship between recorded torque measurements and throwing distance measured from a database of 111,196 throws. The relative rate of workload increase was measured as an acute:chronic workload ratio (ACWR). For each ITP, throw counts, daily/acute/chronic workloads, and ACWR were calculated and plotted over time. Finally, an original ITP was devised based upon a computational model that gradually increases ACWR over time and finished with an optimal chronic workload. Results Each ITP exhibited a unique progression of throwing distances, quantities, and days to create different workload profiles. The three ITPs had throwing schedules ranging from 136 days to 187 days, ACWR spiked above or fell below a literature-defined "safe" range (i.e. 0.7 - 1.3) 19, 21, and 23 times. A novel ITP, predicated on a 146-day schedule and with a final chronic workload of 14.2, was designed to have no spikes outside of the safe range. Conclusion Existing ITPs widely utilized for rehabilitation of baseball pitchers exhibit significantly inconsistent variation in the rate of throwing load progression. Computational modeling may facilitate more incremental workload progression in ITPs, thereby reducing injury during rehabilitation and more efficiently condition a pitcher for return to competition. Level of Evidence 3b.
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Affiliation(s)
| | | | | | | | | | | | | | - Nikhil N Verma
- Midwest Orthopaedics at RUSH
- Rush University Medical Center
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5
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Bullock GS, Ward P, Impellizzeri FM, Kluzek S, Hughes T, Hillman C, Waterman BR, Danelson K, Henry K, Barr E, Healy K, Räisänen AM, Gomez C, Fernandez G, Wolf J, Nicholson KF, Sell T, Zerega R, Dhiman P, Riley RD, Collins GS. Up Front and Open? Shrouded in Secrecy? Or Somewhere in Between? A Meta-Research Systematic Review of Open Science Practices in Sport Medicine Research. J Orthop Sports Phys Ther 2023; 53:735-747. [PMID: 37860866 DOI: 10.2519/jospt.2023.12016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
OBJECTIVE: To investigate open science practices in research published in the top 5 sports medicine journals from May 1, 2022, and October 1, 2022. DESIGN: A meta-research systematic review. LITERATURE SEARCH: Open science practices were searched in MEDLINE. STUDY SELECTION CRITERIA: We included original scientific research published in one of the identified top 5 sports medicine journals in 2022 as ranked by Clarivate: (1) British Journal of Sports Medicine, (2) Journal of Sport and Health Science, (3) American Journal of Sports Medicine, (4) Medicine and Science in Sports and Exercise, and (5) Sports Medicine-Open. Studies were excluded if they were systematic reviews, qualitative research, gray literature, or animal or cadaver models. DATA SYNTHESIS: Open science practices were extracted in accordance with the Transparency and Openness Promotion guidelines and patient and public involvement. RESULTS: Two hundred forty-three studies were included. The median number of open science practices in each study was 2, out of a maximum of 12 (range: 0-8; interquartile range: 2). Two hundred thirty-four studies (96%, 95% confidence interval [CI]: 94%-99%) provided an author conflict-of-interest statement and 163 (67%, 95% CI: 62%-73%) reported funding. Twenty-one studies (9%, 95% CI: 5%-12%) provided open-access data. Fifty-four studies (22%, 95% CI: 17%-27%) included a data availability statement and 3 (1%, 95% CI: 0%-3%) made code available. Seventy-six studies (32%, 95% CI: 25%-37%) had transparent materials and 30 (12%, 95% CI: 8%-16%) used a reporting guideline. Twenty-eight studies (12%, 95% CI: 8%-16%) were preregistered. Six studies (3%, 95% CI: 1%-4%) published a protocol. Four studies (2%, 95% CI: 0%-3%) reported an analysis plan a priori. Seven studies (3%, 95% CI: 1%-5%) reported patient and public involvement. CONCLUSION: Open science practices in the sports medicine field are extremely limited. The least followed practices were sharing code, data, and analysis plans. J Orthop Sports Phys Ther 2023;53(12):1-13. Epub 20 October 2023. doi:10.2519/jospt.2023.12016.
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Affiliation(s)
- Garrett S Bullock
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, NC
- Centre for Sport, Exercise and Osteoarthritis Research Versus Arthritis, University of Oxford, Oxford, United Kingdom
- Sport Injury Prevention Research Center, University of Calgary, Calgary, AB, Canada
| | | | - Franco M Impellizzeri
- School of Sport, Exercise, and Rehabilitation, University of Technology Sydney, Sydney, Australia
| | - Stefan Kluzek
- Centre for Sport, Exercise and Osteoarthritis Research Versus Arthritis, University of Oxford, Oxford, United Kingdom
- Sports Medicine Research Department, University of Nottingham, Nottingham, UK
- English Institute of Sport, Marlow, United Kingdom
| | - Tom Hughes
- Department of Health Professions, Manchester Metropolitan University, Manchester, United Kingdom
| | - Charles Hillman
- Sports Medicine Research Department, University of Nottingham, Nottingham, UK
| | - Brian R Waterman
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Kerry Danelson
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Kaitlin Henry
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Emily Barr
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Kelsey Healy
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Anu M Räisänen
- Department of Physical Therapy Education - Oregon, College of Health Sciences-Northwest, Western University of Health Sciences, Lebanon, OR
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Christina Gomez
- Department of Physical Therapy Education - Oregon, College of Health Sciences-Northwest, Western University of Health Sciences, Lebanon, OR
| | - Garrett Fernandez
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Jakob Wolf
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | - Kristen F Nicholson
- Department of Orthopaedic Surgery & Rehabilitation, Wake Forest School of Medicine, Winston-Salem, NC
| | | | | | - Paula Dhiman
- Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Richard D Riley
- Institute of Applied Health Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Gary S Collins
- Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
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Bullock GS, Ward P, Impellizzeri FM, Kluzek S, Hughes T, Dhiman P, Riley RD, Collins GS. The Trade Secret Taboo: Open Science Methods are Required to Improve Prediction Models in Sports Medicine and Performance. Sports Med 2023; 53:1841-1849. [PMID: 37160562 DOI: 10.1007/s40279-023-01849-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2023] [Indexed: 05/11/2023]
Abstract
Clinical prediction models in sports medicine that utilize regression or machine learning techniques have become more widely published, used, and disseminated. However, these models are typically characterized by poor methodology and incomplete reporting, and an inadequate evaluation of performance, leading to unreliable predictions and weak clinical utility within their intended sport population. Before implementation in practice, models require a thorough evaluation. Strong replicable methods and transparency reporting allow practitioners and researchers to make independent judgments as to the model's validity, performance, clinical usefulness, and confidence it will do no harm. However, this is not reflected in the sports medicine literature. As shown in a recent systematic review of models for predicting sports injury models, most were typically characterized by poor methodology, incomplete reporting, and inadequate performance evaluation. Because of constraints imposed by data from individual teams, the development of accurate, reliable, and useful models is highly reliant on external validation. However, a barrier to collaboration is a desire to maintain a competitive advantage; a team's proprietary information is often perceived as high value, and so these 'trade secrets' are frequently guarded. These 'trade secrets' also apply to commercially available models, as developers are unwilling to share proprietary (and potentially profitable) development and validation information. In this Current Opinion, we: (1) argue that open science is essential for improving sport prediction models and (2) critically examine sport prediction models for open science practices.
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Affiliation(s)
- Garrett S Bullock
- Department of Orthopaedic Surgery and Rehabilitation, Wake Forest School of Medicine, 475 Vine St., Winston-Salem, NC, 27101, USA.
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, NC, USA.
- Centre for Sport, Exercise and Osteoarthritis Research Versus Arthritis, University of Oxford, Oxford, UK.
| | | | - Franco M Impellizzeri
- School of Sport, Exercise, and Rehabilitation, University of Technology Sydney, Sydney, NSW, Australia
| | - Stefan Kluzek
- Centre for Sport, Exercise and Osteoarthritis Research Versus Arthritis, University of Oxford, Oxford, UK
- Sports Medicine Research Department, University of Nottingham, Nottingham, UK
- English Institute of Sport, Bisham Abbey, UK
| | - Tom Hughes
- Manchester United Football Club, Manchester, UK
- Department of Health Professions, Manchester Metropolitan University, Manchester, UK
| | - Paula Dhiman
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Centre for Statistics in Medicine, University of Oxford, Oxford, UK
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Richard D Riley
- Centre for Prognosis Research, School of Medicine, Keele University, Keele, UK
| | - Gary S Collins
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Centre for Statistics in Medicine, University of Oxford, Oxford, UK
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK
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7
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Armitage M, McErlain-Naylor SA, Devereux G, Beato M, Buckthorpe M. On-field rehabilitation in football: Current knowledge, applications and future directions. Front Sports Act Living 2022; 4:970152. [PMID: 36544545 PMCID: PMC9760760 DOI: 10.3389/fspor.2022.970152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 10/24/2022] [Indexed: 12/12/2022] Open
Affiliation(s)
- Mark Armitage
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
- Performance Services Department, Norwich City Football Club, Norwich, United Kingdom
- Faculty of Sport, Allied Health and Performance Science, St Mary's University Twickenham, London, United Kingdom
| | - Stuart A McErlain-Naylor
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, United Kingdom
| | - Gavin Devereux
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Marco Beato
- School of Health and Sports Sciences, University of Suffolk, Ipswich, United Kingdom
| | - Matthew Buckthorpe
- Faculty of Sport, Allied Health and Performance Science, St Mary's University Twickenham, London, United Kingdom
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8
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Hintz C, Colón D, Honnette D, Denning N, Porras E, Willard J, Diamond A. Individualizing the Throwing Progression Following Injury in Baseball Pitchers: the Past, Present, and Future. Curr Rev Musculoskelet Med 2022; 15:561-569. [PMID: 36301515 PMCID: PMC9789277 DOI: 10.1007/s12178-022-09799-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/27/2022] [Indexed: 12/27/2022]
Abstract
PURPOSE OF REVIEW A critical component of any rehabilitation program following injury is a graduated exposure of pathologic or vulnerable tissue to sport-specific stressors. A foundational aspect in the return to sport process following an injury in baseball athletes is the development of an interval throwing program. A shift has occurred in recent years from generic programs to individualized progressions. The current review explores the evolution of interval throwing program construction and discusses the possibilities of the future with advancements in technology and understanding. RECENT FINDINGS Early interval throwing programs relied primarily on pre-determined throwing distance and volume to estimate total training load while following a fixed throwing schedule. Currently, clinicians have begun to utilize available technology in attempts to determine training prescription and obtain more accurate estimates of stresses placed upon the body. Thus, interval throwing programs have become more individualized and flexible to account for each athlete's individual differences and biological response to training. Future development may be able to predict specific internal response to stressors and proactively adjust training load to maximize positive adaptations while minimizing any maladaptive events. As with all concepts and principles within the realm of athlete rehabilitation, clinicians must continue to adapt how they conceptualize and develop individualized interval throwing programs for the overhead throwing athlete. We will continue to see a shift away from a responsive approach to a proactive one, where clinicians can utilize modern technologies to precisely prescribe a throwing dosage based upon expected tissue response within the athlete.
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Affiliation(s)
- Christian Hintz
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA
| | - Dennis Colón
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA
| | - Danielle Honnette
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA
| | - Nathan Denning
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA
| | - Edwin Porras
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA
| | - Justin Willard
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA
| | - Adam Diamond
- Minnesota Twins Baseball Club, One Twins Way, Minneapolis, MN, 55403, USA.
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Croteau F, Thénault F, Blain-Moraes S, Pearsall DJ, Paradelo D, Robbins SM. Automatic detection of passing and shooting in water polo using machine learning: a feasibility study. Sports Biomech 2022:1-15. [PMID: 35225158 DOI: 10.1080/14763141.2022.2044507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 02/15/2022] [Indexed: 10/19/2022]
Abstract
There is currently no efficient way to quantify overhead throwing volume in water polo. Therefore, this study aimed to test the feasibility of a method to detect passes and shots in water polo automatically using inertial measurement units (IMU) and machine-learning algorithms. Eight water polo players wore one IMU sensor on the wrist (dominant hand) and one on the sacrum during six practices each. Sessions were filmed with a video camera and manually tagged for individual shots or passes. Data were synchronised between video tagging and IMU sensors using a cross-correlation approach. Support vector machine (SVM) and artificial neural networks (ANN) were compared based on sensitivity and specificity for identifying shots and passes. A total of 7294 actions were identified during the training sessions, including 945 shots and 5361 passes. Using SVM, passes and shots together were identified with 94.4% (95%CI = 91.8-96.4) sensitivity and 93.6% (95%CI = 91.4-95.4) specificity. Using ANN yielded similar sensitivity (93.0% [95%CI = 90.1-95.1]) and specificity (93.4% [95%CI = 91.1 = 95.2]). The results suggest that this method of identifying overhead throwing motions with IMU has potential for future field applications. A set-up with one single sensor at the wrist can suffice to measure these activities in water polo.
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Affiliation(s)
- Félix Croteau
- School of Physical and Occupational Therapy, McGill University, Montreal, QC, Canada
- Sports Medicine, Institut National du Sport du Québec, Montreal, QC, Canada
- Senior national teams, Water Polo Canada, Montreal, QC, Canada
| | | | - Stefanie Blain-Moraes
- School of Physical and Occupational Therapy, McGill University, Montreal, QC, Canada
| | - David J Pearsall
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | - David Paradelo
- Senior national teams, Water Polo Canada, Montreal, QC, Canada
| | - Shawn M Robbins
- School of Physical and Occupational Therapy, McGill University, Montreal, QC, Canada
- Centre for Interdisciplinary Research in Rehabilitation, Layton-Lethbridge-MacKay Rehabilitation Centre, Montreal, QC, Canada
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10
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Dalen-Lorentsen T. Training load and health problems in football: more complex than we first thought? (PhD Academy Award). Br J Sports Med 2022; 56:592-593. [PMID: 35193855 DOI: 10.1136/bjsports-2021-105403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2022] [Indexed: 11/04/2022]
Affiliation(s)
- Torstein Dalen-Lorentsen
- Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway .,Department of Smart Senors and Microsystems, SINTEF Digital, Oslo, Norway
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11
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Fernandes R, Brito JP, Vieira LHP, Martins AD, Clemente FM, Nobari H, Reis VM, Oliveira R. In-Season Internal Load and Wellness Variations in Professional Women Soccer Players: Comparisons between Playing Positions and Status. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:12817. [PMID: 34886543 PMCID: PMC8657164 DOI: 10.3390/ijerph182312817] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/29/2021] [Accepted: 12/02/2021] [Indexed: 11/16/2022]
Abstract
The internal intensity monitoring in soccer has been used more in recent years in men's football; however, in women's soccer, the existing literature is still scarce. The aims of this study were threefold: (a) to describe the weekly variations of training monotony, training strain and acute: chronic workload ratio through session Rated Perceived Exertion (s-RPE); (b) to describe weekly variations of Hooper Index [stress, fatigue, Delayed Onset Muscle Soreness (DOMS) and sleep]; and (c) to compare those variations between playing positions and player status. Nineteen players (24.1 ± 2.7 years) from a Portuguese BPI League professional team participated in this study. All variables were collected in a 10-week in-season period with three training sessions and one match per week during the 2019/20 season. Considering the overall team, the results showed that there were some associations between Hooper Index categories and s-RPE like stress or fatigue (0.693, p < 0.01), stress or DOMS (0.593, p < 0.01), stress or s-RPE (-0.516, p < 0.05) and fatigue or DOMS (0.688, p < 0.01). There were no differences between all parameters in playing positions or player status. In conclusion, the study revealed that higher levels of fatigue and DOMS occur concurrently with better nights of sleep. Moreover, any in-season variations concerning internal load and perceived wellness seems independent of position or status in outfield players. The data also showed that the higher the players' reported stress, the lower the observed s-RPE, thus possibly indicating a mutual interference of experienced stress levels on the assimilation of training intensity by elite women soccer players.
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Affiliation(s)
- Renato Fernandes
- Sports Science School of Rio Maior–Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal; (J.P.B.); (A.D.M.)
- Life Quality Research Centre, 2040-413 Rio Maior, Portugal
- University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal;
| | - João Paulo Brito
- Sports Science School of Rio Maior–Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal; (J.P.B.); (A.D.M.)
- Life Quality Research Centre, 2040-413 Rio Maior, Portugal
- Research Centre in Sport Sciences, Health Sciences and Human Development, 5001-801 Vila Real, Portugal
| | - Luiz H. Palucci Vieira
- Graduate Program in Movement Sciences, MOVI-LAB Human Movement Research Laboratory, Physical Education Department, School of Sciences, UNESP São Paulo State University, Bauru 17033-360, Brazil;
| | - Alexandre Duarte Martins
- Sports Science School of Rio Maior–Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal; (J.P.B.); (A.D.M.)
- Life Quality Research Centre, 2040-413 Rio Maior, Portugal
- Comprehensive Health Research Centre (CHRC), Departamento de Desporto e Saúde, Escola de Saúde e Desenvolvimento Humano, Universidade de Évora, Largo dos Colegiais, 7004-516 Évora, Portugal
| | - Filipe Manuel Clemente
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal;
- Instituto de Telecomunicações, Delegação da Covilhã, 1049-001 Lisboa, Portugal
| | - Hadi Nobari
- Department of Physical Education and Sports, University of Granada, 18010 Granada, Spain;
- HEME Research Group, Faculty of Sport Sciences, University of Extremadura, 10003 Cáceres, Spain
- Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
- Sports Scientist, Sepahan Football Club, Isfahan 81887-78473, Iran
| | - Victor Machado Reis
- University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal;
- Research Centre in Sport Sciences, Health Sciences and Human Development, 5001-801 Vila Real, Portugal
| | - Rafael Oliveira
- Sports Science School of Rio Maior–Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal; (J.P.B.); (A.D.M.)
- Life Quality Research Centre, 2040-413 Rio Maior, Portugal
- Research Centre in Sport Sciences, Health Sciences and Human Development, 5001-801 Vila Real, Portugal
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12
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Michael SW, Siddall AG, O'Leary TJ, Groeller H, Sampson JA, Blacker SD, Drain JR. Monitoring work and training load in military settings - what's in the toolbox? Eur J Sport Sci 2021; 22:58-71. [PMID: 34463198 DOI: 10.1080/17461391.2021.1971774] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Military personnel are required to complete physically demanding tasks when performing work and training, which may be quantified through the physical stress imposed (external load) or the resultant physiological strain (internal load). The aim of this narrative review is to provide an overview of the techniques used to monitor work and training load in military settings, summarise key findings, and discuss important practical, analytical, and conceptual considerations. Most investigations have focused upon measuring external and internal load in military training environments; however, limited data exist in operational settings. Accelerometry has been the primary tool used to estimate external load, with heart rate commonly used to quantify internal load. Supplemental to heart rate, psychophysiological and biochemical measures have also been investigated to elucidate aspects of internal load. Broadly, investigations have revealed that military training requires personnel to perform relatively large volumes of physical activity (e.g. averaging ∼15,000 steps·day-1) of typically low-moderate intensity activity (<6 MET), although considerable temporal and inter-individual variability is observed from these gross mean estimates. There are limitations associated with these measures and, at best, estimates of external and internal load can only be inferred. These limitations are particularly pertinent for military tasks such as load carriage and manual material handling, which often involve complex activities performed individually or in teams, in a range of operational environments, with multiple layers of protection, over a protracted duration. Comprehensively quantifying external and internal loads during these functional activities poses substantial practical and analytical challenges.
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Affiliation(s)
- Scott W Michael
- Centre of Medical and Exercise Physiology, University of Wollongong, Wollongong, Australia
| | - Andrew G Siddall
- Occupational Performance Research Group, Institute of Sport, University of Chichester, Chichester, UK
| | - Thomas J O'Leary
- Army Health and Performance Research, Army Headquarters, Andover, UK
| | - Herbert Groeller
- Centre of Medical and Exercise Physiology, University of Wollongong, Wollongong, Australia
| | - John A Sampson
- Centre of Medical and Exercise Physiology, University of Wollongong, Wollongong, Australia
| | - Sam D Blacker
- Occupational Performance Research Group, Institute of Sport, University of Chichester, Chichester, UK
| | - Jace R Drain
- Land Division, Defence Science and Technology Group, Melbourne, Australia
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13
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A Systems Analysis Critique of Sport-Science Research. Int J Sports Physiol Perform 2021; 16:1385-1392. [PMID: 34453014 DOI: 10.1123/ijspp.2020-0934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/12/2021] [Accepted: 05/19/2021] [Indexed: 11/18/2022]
Abstract
PURPOSE The broad aim of sport-science research is to enhance the performance of coaches and athletes. Despite decades of such research, it is well documented that sport-science research lacks empirical evidence, and critics have questioned its scientific methods. Moreover, many have pointed to a research-practice gap, whereby the work undertaken by researchers is not readily applied by practitioners. The aim of this study was to use a systems thinking analysis method, causal loop diagrams, to understand the systemic issues that interact to influence the quality of sport-science research. METHODS A group model-building process was utilized to develop the causal loop diagram based on data obtained from relevant peer-reviewed literature and subject-matter experts. RESULTS The findings demonstrate the panoply of systemic influences associated with sport-science research, including the existence of silos, a focus on quantitative research, archaic practices, and an academic system that is incongruous with what it actually purports to achieve. CONCLUSIONS The emergent outcome of the interacting components is the creation of an underperforming sport-science research system, as indicated by a lack of ecological validity, translation to practice, and, ultimately, a research-practice gap.
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Benson LC, Owoeye OBA, Räisänen AM, Stilling C, Edwards WB, Emery CA. Magnitude, Frequency, and Accumulation: Workload Among Injured and Uninjured Youth Basketball Players. Front Sports Act Living 2021; 3:607205. [PMID: 33889842 PMCID: PMC8056300 DOI: 10.3389/fspor.2021.607205] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 02/11/2021] [Indexed: 01/26/2023] Open
Abstract
Overuse injuries are common in basketball. Wearable technology enables the workload to be monitored in sport settings. However, workload-injury models lack a biological basis both in the metrics recorded and how workload is accumulated. We introduce a new metric for monitoring workload: weighted jump height, where each jump height is weighted to represent the expected effect of the jump magnitude on damage to the tendon. The objectives of this study were to use principal components analysis to identify distinct modes of variation in all workload metrics accumulated over 1, 2, 3, and 4 weeks and to examine differences among the modes of variation in workload metrics between participants before the injury and uninjured participants. Forty-nine youth basketball players participated in their typical basketball practices and games, and lower extremity injuries were classified as patellar or Achilles tendinopathy, other overuse, or acute. An inertial measurement unit recorded the number and height of all jumps, and session rating of perceived exertion was recorded. The previous 1-, 2-, 3-, and 4-week workloads of jump count, jump height, weighted jump height, and session rating of perceived exertion were summed for each participant-week. Principal components analysis explained the variance in the accumulated workload variables. Using the retained principal components, the difference between the workload of injured participants in the week before the injury and the mean workload of uninjured participants was described for patellar or Achilles tendinopathy, overuse lower extremity injury, and any lower extremity injury. Participants with patellar or Achilles tendinopathy and overuse lower extremity injuries had a low workload magnitude for all variables in the 1, 2, 3, and 4 weeks before injury compared with the weeks before no injury. Participants with overuse lower extremity injuries and any lower extremity injury had a high previous 1-week workload for all variables along with a low previous 3- and 4-week jump count, jump height, and weighted jump height before injury compared with the weeks before no injury. Weighted jump height represents the cumulative damage experienced by tissues due to repetitive loads. Injured youth basketball athletes had a low previous 3- and 4-week workloads coupled with a high previous 1-week workload.
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Affiliation(s)
- Lauren C. Benson
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- United States Olympic and Paralympic Committee, Colorado Springs, CO, United States
| | - Oluwatoyosi B. A. Owoeye
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Department of Physical Therapy and Athletic Training, Doisy College of Health Sciences, Saint Louis University, Saint Louis, MO, United States
| | - Anu M. Räisänen
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Department of Physical Therapy Education, College of Health Sciences, Western University of Health Sciences, Lebanon, OR, United States
| | - Carlyn Stilling
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - W. Brent Edwards
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Carolyn A. Emery
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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15
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Abstract
Causal pathways between training loads and the mechanisms of tissue damage and athletic injury are poorly understood. Here, the relation between specific training load measures and metrics, and causal pathways of gradual onset and traumatic injury are examined. Currently, a wide variety of internal and external training load measures and metrics exist, with many of these being commonly utilized to evaluate injury risk. These measures and metrics can conceptually be related to athletic injury through the mechanical load-response pathway, the psycho-physiological load-response pathway, or both. However, the contributions of these pathways to injury vary. Importantly, tissue fatigue damage and trauma through the mechanical load-response pathway is poorly understood. Furthermore, considerable challenges in quantifying this pathway exist within applied settings, evidenced by a notable absence of validation between current training load measures and tissue-level mechanical loads. Within this context, the accurate quantification of mechanical loads holds considerable importance for the estimation of tissue damage and the development of more thorough understandings of injury risk. Despite internal load measures of psycho-physiological load speculatively being conceptually linked to athletic injury through training intensity and the effects of psycho-physiological fatigue, these measures are likely too far removed from injury causation to provide meaningful, reliable relationships with injury. Finally, we used a common training load metric as a case study to show how the absence of a sound conceptual rationale and spurious links to causal mechanisms can disclose the weaknesses of candidate measures as tools for altering the likelihood of injuries, aiding the future development of more refined injury risk assessment methods.
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Focused Issue on Workload and Injury to Share Practical Advice With Clinicians, Athletes, and Coaches. J Orthop Sports Phys Ther 2020; 50:536-537. [PMID: 32998616 DOI: 10.2519/jospt.2020.0108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Anyone who works with athletes of any age and ability knows the best way for the athlete to avoid injury is to avoid playing sports. Anyone who works with athletes also knows that athletes want to play sports above almost all else. Understanding the relationship between how much sports activity an athlete participates in (ie, workload) and injury will help clinicians, athletes, and coaches know what to do to keep athletes healthy (injury free) and performing their best. In the October 2020 focused issue of JOSPT, we tackle workload and sports injury. J Orthop Sports Phys Ther 2020;50(10):536-537. doi:10.2519/jospt.2020.0108.
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Training Load and Injury Part 2: Questionable Research Practices Hijack the Truth and Mislead Well-Intentioned Clinicians. J Orthop Sports Phys Ther 2020; 50:577-584. [PMID: 32741323 DOI: 10.2519/jospt.2020.9211] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND In this clinical commentary, we highlight issues related to conceptual foundations and methods used in training load and injury research. We focus on sources of degrees of freedom that can favor questionable research practices such as P hacking and hypothesizing after the results are known, which can undermine the trustworthiness of research findings. CLINICAL QUESTION Is the methodological rigor of studies in the training load and injury field sufficient to inform training-related decisions in clinical practice? KEY RESULTS The absence of a clear conceptual framework, causal structure, and reliable methods can promote questionable research practices, selective reporting, and confirmation bias. The fact that well-accepted training principles (eg, overload progression) are in line with some study findings may simply be a consequence of confirmation bias, resulting from cherry picking and emphasizing results that align with popular beliefs. Identifying evidence-based practical applications, grounded in high-quality research, is not currently possible. The strongest recommendation we can make for the clinician is grounded in common sense: "Do not train too much, too soon"-not because it has been confirmed by studies, but because it reflects accepted generic training principles. CLINICAL APPLICATION The training load and injury research field has fundamental conceptual and methodological weaknesses. Therefore, making decisions about planning and modifying training programs for injury reduction in clinical practice, based on available studies, is premature. Clinicians should continue to rely on best practice, experience, and well-known training principles, and consider the potential influence of contextual factors when planning and monitoring training loads. J Orthop Sports Phys Ther 2020;50(10):577-584. Epub 1 Aug 2020. doi:10.2519/jospt.2020.9211.
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