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Mattiussi A. What goes up must come down: injury and jumping in professional ballet (PhD Academy Award). Br J Sports Med 2024:bjsports-2024-108238. [PMID: 38697622 DOI: 10.1136/bjsports-2024-108238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/24/2024] [Indexed: 05/05/2024]
Affiliation(s)
- Adam Mattiussi
- Faculty of Sport, Allied Health and Performance Science, St Mary's University Twickenham, Twickenham, UK
- Ballet Healthcare, Royal Opera House, London, UK
- Performance Rehabilitation, UK Sports Institute, Bisham, UK
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Bache-Mathiesen LK, Bahr R, Sattler T, Fagerland MW, Whiteley R, Skazalski C. Causal inference did not detect any effect of jump load on knee complaints in elite men's volleyball. Scand J Med Sci Sports 2024; 34:e14635. [PMID: 38671558 DOI: 10.1111/sms.14635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024]
Abstract
The aim was to determine how jump load affects knee complaints in elite men's volleyball. We collected data from four men's premier league volleyball teams through three seasons in a prospective cohort study (65 players, 102 player-seasons). Vert inertial measurement devices captured the jump load (jump frequency and jump height) from 21 088 daily player sessions, and knee complaints were reported in 3568 weekly OSTRC-O questionnaires. Mixed complementary log-log regression models described the probability of (i) experiencing symptoms if players were currently asymptomatic, (ii) worsening symptoms if players had symptoms, and (iii) recovery from knee complaints. Based on our causal assumptions, weekly jump load was modeled as the independent variable, adjusted for age (years), weight (kg), position on volleyball team, and past jump load. No certain evidence of an association was found between weekly jump load and probability of (i) knee complaints (p from 0.10 to 0.32 for three restricted cubic splines of load), (ii) worsening symptoms if the player already had symptoms (p from 0.11 to 0.97), (iii) recovery (p from 0.36 to 0.63). The probability of knee complaints was highest for above-average weekly jump load (~1.2% for an outside hitter with mean age and height) compared with low loads (~1%) and very high loads (→ ~ 0%). The association between jump load and knee complaints risk remains unclear. Small differences in risk across observed jump load levels were observed. It would likely require substantially increased sample sizes to detect this association with certainty.
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Affiliation(s)
- Lena Kristin Bache-Mathiesen
- Oslo Sports Trauma Research Centre, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
| | - Roald Bahr
- Oslo Sports Trauma Research Centre, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - Tine Sattler
- Faculty of Sport, University of Ljubljana, Ljubljana, Slovenia
| | - Morten Wang Fagerland
- Oslo Sports Trauma Research Centre, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
- Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway
| | - Rod Whiteley
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - Christopher Skazalski
- Oslo Sports Trauma Research Centre, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
- Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
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Keogh JAJ, Ruder MC, White K, Gavrilov MG, Phillips SM, Heisz JJ, Jordan MJ, Kobsar D. Longitudinal Monitoring of Biomechanical and Psychological State in Collegiate Female Basketball Athletes Using Principal Component Analysis. TRANSLATIONAL SPORTS MEDICINE 2024; 2024:7858835. [PMID: 38654723 PMCID: PMC11023736 DOI: 10.1155/2024/7858835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/07/2024] [Accepted: 03/23/2024] [Indexed: 04/26/2024]
Abstract
Background The growth in participation in collegiate athletics has been accompanied by increased sport-related injuries. The complex and multifactorial nature of sports injuries highlights the importance of monitoring athletes prospectively using a novel and integrated biopsychosocial approach, as opposed to contemporary practices that silo these facets of health. Methods Data collected over two competitive basketball seasons were used in a principal component analysis (PCA) model with the following objectives: (i) investigate whether biomechanical PCs (i.e., on-court and countermovement jump (CMJ) metrics) were correlated with psychological state across a season and (ii) explore whether subject-specific significant fluctuations could be detected using minimum detectable change statistics. Weekly CMJ (force plates) and on-court data (inertial measurement units), as well as psychological state (questionnaire) data, were collected on the female collegiate basketball team for two seasons. Results While some relationships (n = 2) were identified between biomechanical PCs and psychological state metrics, the magnitude of these associations was weak (r = |0.18-0.19|, p < 0.05), and no other overarching associations were identified at the group level. However, post-hoc case study analysis showed subject-specific relationships that highlight the potential utility of red-flagging meaningful fluctuations from normative biomechanical and psychological patterns. Conclusion Overall, this work demonstrates the potential of advanced analytical modeling to characterize components of and detect statistically and clinically relevant fluctuations in student-athlete performance, health, and well-being and the need for more tailored and athlete-centered monitoring practices.
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Affiliation(s)
- Joshua A. J. Keogh
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Matthew C. Ruder
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Kaylee White
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Momchil G. Gavrilov
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Stuart M. Phillips
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Jennifer J. Heisz
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Matthew J. Jordan
- Faculty of Kinesiology, Sport Medicine Centre, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Dylan Kobsar
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON L8S 4L8, Canada
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Maloney BM, Mattiussi AM, Cleather DJ, Price P, Shaw JW. Jumping demands during classical ballet class. Scand J Med Sci Sports 2024; 34:e14502. [PMID: 37740586 DOI: 10.1111/sms.14502] [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: 05/24/2023] [Revised: 08/16/2023] [Accepted: 09/14/2023] [Indexed: 09/24/2023]
Abstract
Ballet class represents a considerable portion of professional ballet training, yet the external training load demands associated with class-and particularly the jumping demands-have not been investigated. The purpose of this study was to measure the jumping demands of ballet class by sex and rank. Eleven female and eight male elite professional ballet dancers participated in 109 ballet classes taught by 12 different teachers. Jump counts and jump heights were measured during each class. A Poisson generalized linear mixed effects model was used to examine the differences in jump counts between sexes and ranks. Greater jump counts were observed during class in men than in women (153, 95% confidence intervals [CI] [137, 170] vs. 119, 95% CI [109, 131], p = 0.004) and in junior ranking dancers compared with senior ranking dancers (151, 95% CI [138, 165] vs. 121, 95% CI [108, 135], p = 0.006). Female junior and senior ranking dancers jumped at rates of 9.2 ± 2.6 and 8.6 ± 4.7 jumps·min-1 , respectively, while male junior and senior ranking dancers jumped at rates of 9.1 ± 2.6 and 8.7 ± 2.6 jumps·min-1 , respectively. Across all classes, 73% of jumps observed were below 50% of maximum double-legged countermovement jump height. Unlike rehearsals and performances, class offers dancers an opportunity to self-regulate load, and as such, are a useful session to manage jump load, and facilitate gradual return-to-dance pathways. Communication between health care and artistic staff is essential to facilitate load management during class.
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Affiliation(s)
- Brian M Maloney
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, Royal Opera House, London, UK
| | - Adam M Mattiussi
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, Royal Opera House, London, UK
| | - Daniel J Cleather
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Institute for Globally Distributed Open Research and Education (IGDORE), Prague, Czech Republic
| | - Phil Price
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
| | - Joseph W Shaw
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, Royal Opera House, London, UK
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Mattiussi AM, Shaw JW, Price P, Brown DD, Cohen DD, Lineham J, Pedlar CR, Tallent J, Atack AC. Reliability of ankle mechanics during jump landings in turned-out and parallel foot positions in professional ballet dancers. J Biomech 2023; 156:111662. [PMID: 37300978 DOI: 10.1016/j.jbiomech.2023.111662] [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: 12/01/2022] [Revised: 05/10/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023]
Abstract
This study aimed to determine the within- and between-session reliability of ankle mechanics and vertical ground reaction forces (vGRF) during jump landings in turned-out and parallel foot positions in professional ballet dancers. Twenty-four professional ballet dancers (men = 13, women = 11) attended two data collection sessions where they completed five maximal countermovement jumps in each foot position. The ankle joint mechanics and vGRF of the right limb were recorded via a seven-camera motion capture system and one force platform. Within- and between-session intraclass correlation coefficients (ICC), coefficients of variation (CV), standard error of measurement, and minimal detectable change were calculated for three-dimensional ankle excursion, peak ankle angle, ankle joint velocity, moment, and power, as well as peak landing vGRF, time to peak landing vGRF, loading rate, and jump height. Across both foot positions, within- (ICC: 0.17-0.96; CV: 1.4-82.3%) and between-session (ICC: 0.02-0.98; CV:1.3-57.1%) reliability ranged from poor to excellent, with ankle excursion, peak ankle angle, and jump height demonstrating the greatest ICC values (ICC: 0.65-0.96; CV: 1.4-57%). Jump landings in a turned-out foot position demonstrated better within-session reliability compared to a parallel position, however, no difference in between-session reliability across the foot positions was observed. Most ankle mechanics provide adequate between-session, but not within-session, reliability during jump landings in professional ballet dancers.
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Affiliation(s)
- Adam M Mattiussi
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK; Ballet Healthcare, The Royal Ballet, Royal Opera House, London, UK.
| | - Joseph W Shaw
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK; Ballet Healthcare, The Royal Ballet, Royal Opera House, London, UK. https://twitter.com/@josephshaw
| | - Phil Price
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK. https://twitter.com/@thepricep
| | - Derrick D Brown
- Institute of Sport Science, Dance Science, University of Bern, Bern, Switzerland. https://twitter.com/@ddbrown__
| | - Daniel D Cohen
- Faculty of Health Sciences, University of Santander, Bucaramanga, Colombia. https://twitter.com/@danielcohen1971
| | - Jack Lineham
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
| | - Charles R Pedlar
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK; Division of Surgery and Interventional Science, University College London, UK. https://twitter.com/@pedlarcr
| | - Jamie Tallent
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, UK; Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia. https://twitter.com/@jamietallent
| | - Alexandra C Atack
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK. https://twitter.com/@a_atack2
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Shaw JW, Maloney B, Mattiussi AM, Brown DD, Springham M, Pedlar CR, Tallent J. The development and validation of an open-source accelerometery algorithm for measuring jump height and frequency in ballet. J Sports Sci 2023:1-7. [PMID: 37377013 DOI: 10.1080/02640414.2023.2223048] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 05/17/2023] [Indexed: 06/29/2023]
Abstract
The aim was to determine the validity of an open-source algorithm for measuring jump height and frequency in ballet using a wearable accelerometer. Nine professional ballet dancers completed a routine ballet class whilst wearing an accelerometer positioned at the waist. Two investigators independently conducted time-motion analysis to identify time-points at which jumps occurred. Accelerometer data were cross-referenced with time-motion data to determine classification accuracy. To determine the validity of the measurement of jump height, five participants completed nine jetés, nine sautés and three double tour en l'air from a force plate. The jump height predicted by the accelerometer algorithm was compared to the force plate jump height to determine agreement. Across 1440 jumps observed in time-motion analysis, 1371 true positives, 34 false positives and 69 false negatives were identified by the algorithm, resulting in a sensitivity of 0.98, a precision of 0.95 and a miss rate of 0.05. For all jump types, mean absolute error was 2.6 cm and the repeated measures correlation coefficient was 0.97. Bias was 1.2 cm and 95% limits of agreement were -4.9 to 7.2 cm. The algorithm may be used to manage jump load, implement periodization strategies, or plan return-to-jump pathways for rehabilitating athletes.
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Affiliation(s)
- Joseph W Shaw
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, London, UK
| | - Brian Maloney
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, London, UK
| | - Adam M Mattiussi
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, London, UK
| | - Derrick D Brown
- Institute of Sport Science, Dance Science, University of Bern, Bern, Switzerland
| | - Matthew Springham
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Ballet Healthcare, The Royal Ballet, London, UK
| | - Charles R Pedlar
- Faculty of Sport, Allied Health and Performance Science, St Mary's University, Twickenham, UK
- Institute of Sport, Exercise, and Health, Division of Surgery and Interventional Science, University College London, London, UK
| | - Jamie Tallent
- School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, UK
- Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia
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Women's College Volleyball Players Exhibit Asymmetries During Double-Leg Jump Landing Tasks. J Sport Rehabil 2023; 32:85-90. [PMID: 35940581 DOI: 10.1123/jsr.2022-0026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/25/2022] [Accepted: 06/13/2023] [Indexed: 01/03/2023]
Abstract
CONTEXT Women's volleyball requires frequent and repetitive jumping that when performed with altered biomechanics, including kinematic or kinetic asymmetry, may place the athlete at high risk for injury. This study identified and analyzed lower-extremity biomechanical asymmetries in college women's volleyball players during standard and sport-specific double-leg landing tasks. DESIGN Cross-sectional laboratory study. METHODS Eighteen female college volleyball players were analyzed using standard 3D motion capture techniques during a drop vertical jump and an unanticipated lateral reactive jump task. Repeated-measures multivariate analysis of variance identified asymmetries in kinematic and kinetic variables of each task. RESULTS Average symmetry indices ranged from 9.3% to 31.3% during the drop vertical jump and 11.9% to 25.6% during the reactive jump task. During the drop vertical jump, the dominant limb exhibited lower knee abduction moments (P = .03), ankle dorsiflexion moments (P = .02), ankle eversion moments (P = .003) and vertical ground reaction forces (P = .03), and greater ankle inversion moments (P = .001). Both kinematic (λ = 0.27, P = .03) and kinetic (λ = 0.12, P = .008) asymmetries were identified during the reactive jump task. The dominant limb exhibited greater peak knee flexion (P = .003) and ankle dorsiflexion (P = .02) angles, and greater ankle dorsiflexion (P = .005) and inversion (P = .03) moments than the nondominant limb. CONCLUSIONS These asymmetries observed during double-leg landing tasks may predispose volleyball athletes to unilaterally higher ground reaction or muscle forces and ultimately a greater risk of injury during landing.
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Taylor JB, Barnes HC, Gombatto SP, Greenwood D, Ford KR. Quantifying External Load and Injury Occurrence in Women's Collegiate Volleyball Players Across a Competitive Season. J Strength Cond Res 2022; 36:805-812. [DOI: 10.1519/jsc.0000000000004212] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brooks ER, Benson AC, Fox AS, Bruce LM. Quantifying jumps and external load in netball using VERT inertial measurement units. Sports Biomech 2021:1-10. [PMID: 34871143 DOI: 10.1080/14763141.2021.2009906] [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: 12/15/2020] [Accepted: 11/18/2021] [Indexed: 10/19/2022]
Abstract
This study assesses the relationship between an inexpensive and an established inertial measurement device for the measurement of movement and jumps in netball. Twenty-five female netballers participated in this study (11 elite and 14 sub-elite). Two inertial measurement devices (Catapult ClearSky T6 and VERT Classic) were worn simultaneously during a training session. The 'Kinetic Energy' output provided by the VERT device was compared to the total PlayerLoad collected by the ClearSky T6 device. Automated total jump counts were also compared across devices. A correlation of r = 0.76 (95% confidence interval [CI]; 0.52 to 0.89) was identified between total PlayerLoad and 'Kinetic Energy'. Similarly, a correlation of r = 0.81 (95% CI; 0.61 to 0.91) was identified for the relationship between ClearSky T6 jump count and VERT jump count. Mean bias of 1.7 jumps (95% CI; -2.5 to 5.8) with 95% limits of agreement (-17.9 to 21.3) were found when comparing the jump counts between the ClearSky T6 and VERT devices. The correlations found in this study indicate that the VERT devices may be an accessible alternative for sub-elite athletes; however, the wide confidence intervals and limits of agreement warrant caution.
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Affiliation(s)
- Edward R Brooks
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Amanda C Benson
- Department of Health and Biostatistics, Sport Innovation Research Group, Swinburne University, Hawthorn, Australia
| | - Aaron S Fox
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Lyndell M Bruce
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
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Piedra A, Peña J, Caparrós T. Monitoring Training Loads in Basketball: A Narrative Review and Practical Guide for Coaches and Practitioners. Strength Cond J 2021. [DOI: 10.1519/ssc.0000000000000620] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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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: 2] [Impact Index Per Article: 0.7] [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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12
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Benson LC, Stilling C, Owoeye OBA, Emery CA. Evaluating Methods for Imputing Missing Data from Longitudinal Monitoring of Athlete Workload. JOURNAL OF SPORTS SCIENCE AND MEDICINE 2021; 20:188-196. [PMID: 33948096 DOI: 10.52082/jssm.2021.188] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/26/2021] [Indexed: 11/24/2022]
Abstract
Missing data can influence calculations of accumulated athlete workload. The objectives were to identify the best single imputation methods and examine workload trends using multiple imputation. External (jumps per hour) and internal (rating of perceived exertion; RPE) workload were recorded for 93 (45 females, 48 males) high school basketball players throughout a season. Recorded data were simulated as missing and imputed using ten imputation methods based on the context of the individual, team and session. Both single imputation and machine learning methods were used to impute the simulated missing data. The difference between the imputed data and the actual workload values was computed as root mean squared error (RMSE). A generalized estimating equation determined the effect of imputation method on RMSE. Multiple imputation of the original dataset, with all known and actual missing workload data, was used to examine trends in longitudinal workload data. Following multiple imputation, a Pearson correlation evaluated the longitudinal association between jump count and sRPE over the season. A single imputation method based on the specific context of the session for which data are missing (team mean) was only outperformed by methods that combine information about the session and the individual (machine learning models). There was a significant and strong association between jump count and sRPE in the original data and imputed datasets using multiple imputation. The amount and nature of the missing data should be considered when choosing a method for single imputation of workload data in youth basketball. Multiple imputation using several predictor variables in a regression model can be used for analyses where workload is accumulated across an entire season.
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Affiliation(s)
- Lauren C Benson
- United States Olympic & Paralympic Committee, Colorado Springs, CO, United States.,Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Carlyn Stilling
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - Oluwatoyosi B A Owoeye
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada.,Department of Physical Therapy and Athletic Training, Doisy College of Health Sciences, Saint Louis University, Saint Louis, MO, United States
| | - Carolyn A Emery
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada.,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Canada.,McCaig Bone and Joint Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada.,Departments of Community Health Sciences and Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Canada
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13
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Simpson MJ, Jenkins DG, Scanlan AT, Kelly VG. Relationships Between External- and Internal-Workload Variables in an Elite Female Netball Team and Between Playing Positions. Int J Sports Physiol Perform 2020; 15:841-846. [PMID: 32163926 DOI: 10.1123/ijspp.2019-0619] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 11/18/2022]
Abstract
PURPOSE To examine relationships between external- and internal-workload variables in an elite female netball team, with consideration of positional differences. METHODS Nine elite female netball athletes had their weekly workloads monitored across their preseason and competition phases of a season. Internal workload was determined using summated heart-rate (HR) zones and session ratings of perceived exertion (sRPE), whereas external workload was determined using inertial movement units and included absolute PlayerLoad (PL), relative PL (PL per minute), accelerations (ACCEL), decelerations (DECEL), jumps, changes of direction (COD), high-intensity events, medium-intensity events, low-intensity events, PL in the forward direction, PL in the sideways direction, and PL in the vertical direction. Relationships between external- and internal-workload variables in the team and relative to playing position were examined. RESULTS Across the team, the strongest external workloads that correlated with summated HR zones were PL (r = .65), COD (r = .64), ACCEL (r = .61), and DECEL (r = .61). The strongest external workloads that correlated with sRPE were COD (r = .79), followed by jumps (r = .76), ACCEL (r = .75), and DECEL (r = .75). For all positions, except-goal shooter, the strongest correlation was between PL and sRPE (r = .88-.94). In the goal-shooter position, the strongest correlation was between summated HR zones and DECEL (r = .89). CONCLUSIONS The inertial movement unit-derived external-workload variables are strongly related to common internal-workload variables. In particular, COD and sRPE appear to provide a good monitoring combination of external and internal training loads for elite netball players.
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Taylor JB, Kantor JL, Hockenjos TJ, Barnes HC, Dischiavi SL. Jump load and landing patterns of collegiate female volleyball players during practice and competition. J Sports Med Phys Fitness 2019; 59:1892-1896. [PMID: 31062948 DOI: 10.23736/s0022-4707.19.09650-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Overuse lower extremity injuries are common in women's court volleyball players and are likely due to the repetitive jumping and landing the sport requires. The purpose of this study was to quantify jump load during collegiate women's volleyball, describe the quantity of double-leg (DL) to single-leg (SL) landing strategies, and compare loads and landing strategies between games and practices. METHODS Fourteen collegiate Division-1 women's court volleyball players participated in the study. Volleyball-specific activity demands were quantified using video analysis from three consecutive practices and one match. Investigators recorded the total frequency of jump landings, and the frequency and percentage of double-leg (DL) landings and single-leg (SL) landings of fourteen collegiate Division-1 women's court volleyball players. Repeated measures ANOVAs identified differences in jumping load and percentages of DL and SL landings among practices and between practices and games (P<0.05). RESULTS On average, there was a significantly higher overall jumping load (P=0.01) and frequency of DL (P=0.03) and SL (P=0.04) landings during practice than games, yet no differences between practices (P>0.05). Approximately 75% of all landings were DL, and individual patterns of DL to SL landings were consistent across events (P>0.05). CONCLUSIONS Women's collegiate volleyball demands high volumes of repetitive jumping and landing with SL and DL support that may make these athletes susceptible to overuse injuries, especially during practice.
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Affiliation(s)
- Jeffrey B Taylor
- Department of Physical Therapy, High Point University, High Point, NC, USA -
| | - Jenny L Kantor
- Department of Exercise Science, High Point University, High Point, NC, USA
| | - Thomas J Hockenjos
- Department of Exercise Science, High Point University, High Point, NC, USA
| | - Haley C Barnes
- Department of Exercise Science, High Point University, High Point, NC, USA
| | - Steven L Dischiavi
- Department of Physical Therapy, High Point University, High Point, NC, USA
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