1
|
Dillon P, Lovell R, Joyce D, Norris D. Maximum speed exposures in Australian rules football: do methods matter? SCI MED FOOTBALL 2024; 8:287-290. [PMID: 37143341 DOI: 10.1080/24733938.2023.2211048] [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] [Accepted: 04/29/2023] [Indexed: 05/06/2023]
Abstract
This study compared weekly near-to-maximum speed exposure data when determined via different methods and criteria. Forty-seven professional Australian rules football (AF) players undertook pre-season sprint assessments (PSSA) via 3 × 50 m maximal efforts using 10 Hz GPS over two consecutive seasons. The same technology was used continually during the in-season to identify maximum speeds attained in training and matches. Weekly near-to-maximal speed (MS) exposure counts were aggregated for speeds ≥80%, ≥85%, ≥90% and ≥95% of their individual maximum for both determination approaches. Weekly near-to-MS exposures was lower (p < 0.0001) when determined from in-season monitoring for ≥80% (-1.26; CI: -1.58 to -0.93), ≥85% (-0.78; CI: -0.97 to -0.59), ≥90% (-0.42; CI: -0.53 to -0.32), and ≥95% (-0.09; CI: -0.12 to -0.06) versus PSSA, with no effect of playing position (P ≥ 0.161). Although ≥80% and ≥85% near-to-maximum speed exposure data was meaningfully influenced by the determination method, the effect was somewhat trivial at higher speed criteria (≥90% and ≥95%) often considered important for performance gains and injury risk reduction purposes. Maximum speed determination methods therefore may be used interchangeably, and discrete sprint assessments may not be necessary for this purpose.
Collapse
Affiliation(s)
- Pat Dillon
- School of Health Sciences, Western Sydney University, Penrith, Australia
| | - Ric Lovell
- School of Health Sciences, Western Sydney University, Penrith, Australia
- Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, Australia
| | - David Joyce
- Synapsing Strategy and Decision Making, Sydney, Australia
| | - Dean Norris
- School of Health Sciences, Western Sydney University, Penrith, Australia
| |
Collapse
|
2
|
Thome M, Nimphius S, Jordan MJ, Thorpe RT. Relationship Between External Training Load and Session Rating of Perceived Exertion Training Impulse in Elite Sprinters. Int J Sports Physiol Perform 2024:1-6. [PMID: 38862106 DOI: 10.1123/ijspp.2023-0341] [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: 09/27/2023] [Revised: 03/29/2024] [Accepted: 04/17/2024] [Indexed: 06/13/2024]
Abstract
PURPOSE To quantify the change in session rating of perceived exertion training impulse (RPE-TRIMP) that may occur in response to increased running distance at 3 running velocity ranges in elite sprinters. METHODS We monitored training load in elite sprinters (women: n = 7; men: n = 11) using wearable Global Positioning System technology and RPE-TRIMP for a total of 681 individual training sessions during a 22-week competition-preparation period. Internal training load was operationalized by RPE-TRIMP, and external training load was operationalized by distance covered in 3 velocity ranges. A linear mixed-effects model with athlete as a random effect was fit to RPE-TRIMP with total distance covered at ≤69.99% (low-velocity running [LVR]), 70% to 84.99% (high-velocity running [HVR]), and 85% to 100% (very-high-velocity running [VHVR]) of individual maximum velocity. RESULTS Increased running distance in all 3 velocity ranges (LVR, HVR, and VHVR) resulted in a significant (P < .001) increase in RPE-TRIMP. Coefficients (95% CIs) were .10 (.08-.11) for LVR, .23 (.18-.28) for HVR, and .44 (.35-.53) for VHVR. A 50-m increase in running distance covered in the LVR, HVR, and VHVR velocity ranges was associated with increases in RPE-TRIMP of 5, 11.5, and 22 arbitrary units, respectively. CONCLUSIONS Internal training load, calculated as RPE-TRIMP, increased with increases in total distance covered in the LVR, HVR, and VHVR velocity ranges (P < .001). RPE-TRIMP can be a practical solution for monitoring global training-session load in elite sprinters.
Collapse
Affiliation(s)
- Matthew Thome
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, WA, Australia
- Nebraska Athletic Performance Lab, University of Nebraska, Lincoln, NE, USA
| | - Sophia Nimphius
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, WA, Australia
| | - Matthew J Jordan
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, WA, Australia
- Faculty of Kinesiology, Sport Medicine Centre, University of Calgary, Calgary, AB, Canada
| | - Robin T Thorpe
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| |
Collapse
|
3
|
Santicchi G, Stillavato S, Deriu M, Comi A, Cerveri P, Esposito F, Zago M. Validation of Step Detection and Distance Calculation Algorithms for Soccer Performance Monitoring. SENSORS (BASEL, SWITZERLAND) 2024; 24:3343. [PMID: 38894136 PMCID: PMC11174549 DOI: 10.3390/s24113343] [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: 04/20/2024] [Revised: 05/18/2024] [Accepted: 05/21/2024] [Indexed: 06/21/2024]
Abstract
This study focused on developing and evaluating a gyroscope-based step counter algorithm using inertial measurement unit (IMU) readings for precise athletic performance monitoring in soccer. The research aimed to provide reliable step detection and distance estimation tailored to soccer-specific movements, including various running speeds and directional changes. Real-time algorithms utilizing shank angular data from gyroscopes were created. Experiments were conducted on a specially designed soccer-specific testing circuit performed by 15 athletes, simulating a range of locomotion activities such as walking, jogging, and high-intensity actions. The algorithm outcome was compared with manually tagged data from a high-quality video camera-based system for validation, by assessing the agreement between the paired values using limits of agreement, concordance correlation coefficient, and further metrics. Results returned a step detection accuracy of 95.8% and a distance estimation Root Mean Square Error (RMSE) of 17.6 m over about 202 m of track. A sub-sample (N = 6) also wore two pairs of devices concurrently to evaluate inter-unit reliability. The performance analysis suggested that the algorithm was effective and reliable in tracking diverse soccer-specific movements. The proposed algorithm offered a robust and efficient solution for tracking step count and distance covered in soccer, particularly beneficial in indoor environments where global navigation satellite systems are not feasible. This advancement in sports technology widens the spectrum of tools for coaches and athletes in monitoring soccer performance.
Collapse
Affiliation(s)
- Gabriele Santicchi
- Department of Biomedical Sciences for Health, Università Statale di Milano, Via Mangiagalli 31, 20133 Milan, Italy; (S.S.); (F.E.); (M.Z.)
| | - Susanna Stillavato
- Department of Biomedical Sciences for Health, Università Statale di Milano, Via Mangiagalli 31, 20133 Milan, Italy; (S.S.); (F.E.); (M.Z.)
| | - Marco Deriu
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Via Ponzio 34/5, 20133 Milan, Italy; (M.D.); (P.C.)
| | - Aldo Comi
- Soccerment s.r.l, Viale Monza 259/265, 20126 Milan, Italy
| | - Pietro Cerveri
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Via Ponzio 34/5, 20133 Milan, Italy; (M.D.); (P.C.)
| | - Fabio Esposito
- Department of Biomedical Sciences for Health, Università Statale di Milano, Via Mangiagalli 31, 20133 Milan, Italy; (S.S.); (F.E.); (M.Z.)
| | - Matteo Zago
- Department of Biomedical Sciences for Health, Università Statale di Milano, Via Mangiagalli 31, 20133 Milan, Italy; (S.S.); (F.E.); (M.Z.)
| |
Collapse
|
4
|
Hannay WM, Sliepka JM, Parker K, Sammons K, Gee AO, Kweon CY, Hagen MS. Limited Return to Preinjury Performance in NCAA Division I American Football Players With Hamstring Injuries. Orthop J Sports Med 2024; 12:23259671241243345. [PMID: 38708007 PMCID: PMC11070146 DOI: 10.1177/23259671241243345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 10/24/2023] [Indexed: 05/07/2024] Open
Abstract
Background Hamstring strains are common among elite athletes, but their effect on return to the same level of play in American football has been incompletely characterized. Purpose Data on National Collegiate Athletics Association Division I college football players with acute hamstring strains were gathered to identify the effects these injuries have on both return to play and athletic performance regarding velocity, workload, and acceleration. Study Design Case Series; Level of evidence, 4. Methods Injury data for a single Division I football team were prospectively recorded over a 4-year period. Players wore global navigation satellite system and local positioning system (GNSS/LPS) devices to record movement data in practices and games. The practice and game data were cross-referenced to evaluate players with isolated acute hamstring strains. Comparisons were made regarding players' pre- and postinjury ability to maintain high velocity (>12 mph [19.3 kph]), maximal velocity, triaxial acceleration, and inertial movement analysis (IMA). There were 58 hamstring injuries in 44 players, of which 25 injuries from 20 players had GNSS/LPS data. Results Players were able to return to play from all 25 injury incidences at a mean of 9.2 days. At the final mean follow-up of 425 days, only 4 players had reached preinjury function in all measurements; 12 players were able to return in 2 of the 4 metrics; and only 8 players reached their preinjury ability to maintain high velocity. For those who did not achieve this metric, there was a significant difference between pre- and postinjury values (722 vs 442 m; P = .016). A total of 14 players were able to regain their IMA. Players who returned to prior velocity or acceleration metrics did so at a mean of 163 days across all metrics. Conclusion While players may be able to return to play after hamstring strain, many players do not reach preinjury levels of acceleration or velocity, even after 13.5 months. Further studies are needed to confirm these findings, assess clinical relevance on imaging performance, and improve hamstring injury prevention and rehabilitation.
Collapse
Affiliation(s)
- William M. Hannay
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
| | - Joseph M. Sliepka
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
| | - Kate Parker
- Department of Orthopaedics and Rehabilitation, University of New Mexico, Albuquerque, New Mexico, USA
| | - Kyle Sammons
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
| | - Albert O. Gee
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
| | - Christopher Y. Kweon
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
| | - Mia S. Hagen
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA
| |
Collapse
|
5
|
Pillitteri G, Rossi A, Cintia P, Trecroci A, Petrucci M, Battaglia G. Association between match-related physical activity profiles and playing positions in different tasks: A data driven approach. J Sports Sci 2024:1-10. [PMID: 38574361 DOI: 10.1080/02640414.2024.2338026] [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: 09/29/2022] [Accepted: 03/25/2024] [Indexed: 04/06/2024]
Abstract
Assessing the intensity characteristics of specific soccer drills (matches, small-side game, and match-based exercises) could help practitioners to plan training sessions by providing the optimal stimulus for every player. In this paper, we propose a data analytics framework to assess the neuromuscular or metabolic characteristics of a soccer-specific exercise in relation with the expected match intensity. GPS data describing the physical tasks' external intensity during an entire season of twenty-eight semi-professional soccer players competing at the fourth Italian division were used in this study. A supervised machine-learning approach was tested in order to detect difference in playing positions in different sport-specific drills. Moreover, a non-supervised machine-learning model was used to profile the match neuromuscular and metabolic characteristics. Players' playing positions during matches and match-based exercises are characterised by specific metabolic and neuromuscular characteristics related to tactical demands, while in the small-side game these differences are not detected. Additionally, our framework permits to evaluate if the match performance request is mirrored during training drills. Practitioners could evaluate the type of stimulus performed by a player in a specific training drill in order to assess if they reflect the matches characteristics of their specific playing position.
Collapse
Affiliation(s)
- Guglielmo Pillitteri
- Sport and Exercise Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Alessio Rossi
- Department of Research and Development, Feel Good Plus S.R.L. - MyPowerSet, Rome, Italy
- Department of Computer Science, University of Pisa, Pisa, Italy
- National Research Council (CNR), Institute of Information Science and Technologies (ISTI), Pisa, Italy
| | - Paolo Cintia
- Department of Computer Science, University of Pisa, Pisa, Italy
| | - Athos Trecroci
- Department of Biomedical Science for Health, University of Milan, Milan, Italy
| | - Marco Petrucci
- Department of Performance, Palermo Football Club, Palermo, Italy
| | - Giuseppe Battaglia
- Sport and Exercise Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| |
Collapse
|
6
|
Hu X, Boisbluche S, Philippe K, Maurelli O, Ren X, Li S, Xu B, Prioux J. Position-specific workload of professional rugby union players during tactical periodization training. PLoS One 2024; 19:e0288345. [PMID: 38551898 PMCID: PMC10980212 DOI: 10.1371/journal.pone.0288345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 06/20/2023] [Indexed: 04/01/2024] Open
Abstract
The positional workload characteristics in rugby union on three acquisition days (i.e. strength, endurance, and speed days) of tactical periodization are still relatively unknown. Therefore, the primary aim of this study was to shed light on the positional external workload variables (10 Hz Global Positioning System and accelerometer microtechnology) and internal workload indicators (the session rating of perceived exertion) of players in a professional rugby union team by utilizing and comparing two tactical periodization models. Twenty-six male players (15 forwards and 11 backs) were recruited from a French second-division rugby club. Data were obtained over 10 weeks of in-season home games: a total of 780 observations were analyzed. Student's t-test observed different external workload profiles between positions among acquisition days. Mean external workload values, except PlayerLoadslow, were significantly higher (p≤0.01; effect size: 0.41-1.93) for backs than forwards for all acquisition days. Moreover, forwards perceived a higher internal workload than backs on the strength day of both models. The findings demonstrate that applying these two tactical periodization models could result in effective rugby union training. Validating external and internal workload characteristics on tactical periodization acquisition days enables extensive analysis of training load monitoring data; these data can be utilized to discover the unique characteristics of each position and design position-specific acquisition days to improve performance.
Collapse
Affiliation(s)
- Xiaopan Hu
- Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China
- Movement, Sport, and Health Sciences Laboratory, Rennes 2 University, Bruz, France
- Department of Sport Sciences and Physical Education, École Normale Supérieure de Rennes, Bruz, France
| | | | - Kilian Philippe
- Department of Sport Sciences and Physical Education, École Normale Supérieure de Rennes, Bruz, France
- Movement, Balance, Performance, and Health Laboratory, University of Pau and Pays de l’Adour, Tarbes, France
| | - Olivier Maurelli
- Muscle Dynamics and Metabolism Laboratory, University of Montpellier, Montpellier, France
| | - Xiangyu Ren
- Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China
- Movement, Sport, and Health Sciences Laboratory, Rennes 2 University, Bruz, France
- Department of Sport Sciences and Physical Education, École Normale Supérieure de Rennes, Bruz, France
| | - Shichang Li
- Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Bo Xu
- Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Jacques Prioux
- Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China
- Movement, Sport, and Health Sciences Laboratory, Rennes 2 University, Bruz, France
- Department of Sport Sciences and Physical Education, École Normale Supérieure de Rennes, Bruz, France
| |
Collapse
|
7
|
Crang ZL, Duthie G, Cole MH, Weakley J, Hewitt A, Johnston RD. The validity of raw custom-processed global navigation satellite systems data during straight-line sprinting across multiple days. J Sci Med Sport 2024; 27:204-210. [PMID: 38195366 DOI: 10.1016/j.jsams.2023.12.004] [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: 06/29/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 01/11/2024]
Abstract
OBJECTIVES (1) Determine the validity of instantaneous speed and acceleration and (2) the variation in validity over time (multiple sessions) for global navigation satellite systems (GNSS) devices. DESIGN Repeated measures. METHODS 10-Hz GNSS devices from Statsports (n = 2, Apex Pro) and Catapult (n = 2, Vector S7) were examined, whilst a speed laser manufactured by MuscleLab (n = 1, LaserSpeed) was the criterion measure, sampling at 2.56 kHz, with data exported at 1000 Hz. Ten participants completed 40 m sprinting and changes of pace on three separate days. Root mean square error (RMSE) was used to assess the magnitude and direction of the difference between GNSS and criterion measures (instantaneous speed, instantaneous acceleration). Linear mixed models were built to assess the difference in validity across days. RESULTS RMSE ranged from 0.14 to 0.21 m·s-1 and 0.22 to 0.47 m·s-2 for speed and acceleration, respectively showing strong agreement. There were small variations in the agreement to criterion between days for both devices for speed (Catapult RMSE = 0.12 to 21 m·s-1; Statsports RMSE = 0.14 to 0.17 m·s-1) and for acceleration (Catapult RMSE = 0.26 to 0.47 m·s-2; Statsports RMSE = 0.22 to 0.43 m·s-2) across all movements. There was a negative linear relationship between speed and acceleration error as speed increased. CONCLUSIONS Wearable microtechnology devices from Catapult (Vector S7) and Statsports (Apex Pro) have suitable validity when measuring instantaneous speed and acceleration across multiple days. There may be small variations during different sessions and over the speed spectrum.
Collapse
Affiliation(s)
- Zachary L Crang
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia.
| | - Grant Duthie
- School of Behavioural and Health Sciences, Australian Catholic University, Strathfield, NSW, Australia
| | - Michael H Cole
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia
| | - Jonathon Weakley
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia; Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Brisbane, QLD, Australia; Carnegie Applied Rugby Research (CARR) Centre, School of Sport, Leeds Beckett University, Leeds, United Kingdom
| | - Adam Hewitt
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia
| | - Rich D Johnston
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia; Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre, Australian Catholic University, Brisbane, QLD, Australia; Carnegie Applied Rugby Research (CARR) Centre, School of Sport, Leeds Beckett University, Leeds, United Kingdom
| |
Collapse
|
8
|
Ren X, Henry M, Boisbluche S, Philippe K, Demy M, Ding S, Prioux J. Optimization of training for professional rugby union players: investigating the impact of different small-sided games models on GPS-derived performance metrics. Front Physiol 2024; 15:1339137. [PMID: 38410810 PMCID: PMC10895442 DOI: 10.3389/fphys.2024.1339137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/26/2024] [Indexed: 02/28/2024] Open
Abstract
Introduction: Professional rugby union players can improve their performance by engaging in small-sided games (SSGs), which simulate the movement patterns of the game. This study collected metrics related to running performance and mechanical workload and their relative values from both forward and back positions, aiming to explore the impact of different SSGs factors on athlete workload, as well as the workload difference between official games (OGs) and SSGs. Methods: The monitored GPS data were collected from SSGs with different player numbers and pitch sizes (five sessions), SSG rules (5 weeks, four sessions per week), and OGs conducted throughout the year. Additionally, the study compared changes in players' sprinting performance before and after two SSG sessions. Results: Backs had greater workload than forwards. Less space and number of players SSG (4 vs. 4, 660 m2) was conducive to facilitating training for players in acceleration and deceleration. Conversely, larger spaces were associated with improved running performance. However, the introduction of a floater had no significant impact on performance improvement. Additionally, the 7 vs. 4 model (seven players engaged with four opponents) resulted in the greatest workload during medium-hard accelerations (F = 52.76-88.23, p < 0.001, ηp 2 = 0.19-0.28). Japan touch model allowed for more high-speed running training (F = 47.93-243.55, p < 0.001, ηp 2 = 1.52). The workload performed by SSGs can almost cover that of OGs (F = 23.36-454.21, p < 0.05, ηp 2 = 0.03-0.57). In the context of ηp 2, values around 0.01, 0.06 and 0.14 indicate small, medium and large effects respectively. Discussion: However, given the significantly higher workload of SSGs and the slight decrease in sprinting performance, further research is required to examine the training patterns of SSGs. This study provided insight into the impact of player numbers, pitch size, and rules on rugby-specific SSGs. Coaches should optimize SSG setups for enhanced training outcomes, ensuring the long-term development of physical capacity, technical and tactical skills.
Collapse
Affiliation(s)
- Xiangyu Ren
- Sino-French Joint Research Center of Sport Science, Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, College of Physical Education and Health, East China Normal University, Shanghai, China
- Movement, Sport, Health Laboratory, Rennes 2 University, Bruz, France
- Department of Sports Sciences and Physical Education, École Normale Supérieure de Rennes, Bruz, France
| | - Mathieu Henry
- Rugby Club Vannes, French Rugby Federation, Vannes, France
| | | | - Kilian Philippe
- Laboratory of Movement, Balance, Performance and Health (MEPS, EA-4445), University of Pau and Pays de l’Adour, Tarbes, France
| | - Mathieu Demy
- Sino-French Joint Research Center of Sport Science, Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, College of Physical Education and Health, East China Normal University, Shanghai, China
- Rugby Club Vannes, French Rugby Federation, Vannes, France
| | - Shuzhe Ding
- Sino-French Joint Research Center of Sport Science, Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, College of Physical Education and Health, East China Normal University, Shanghai, China
- Movement, Sport, Health Laboratory, Rennes 2 University, Bruz, France
| | - Jacques Prioux
- Sino-French Joint Research Center of Sport Science, Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, College of Physical Education and Health, East China Normal University, Shanghai, China
- Movement, Sport, Health Laboratory, Rennes 2 University, Bruz, France
- Department of Sports Sciences and Physical Education, École Normale Supérieure de Rennes, Bruz, France
| |
Collapse
|
9
|
Stables RG, Hannon MP, Costello NB, McHaffie SJ, Sodhi JS, Close GL, Morton JP. Acute fuelling and recovery practices of academy soccer players: implications for growth, maturation, and physical performance. SCI MED FOOTBALL 2024; 8:37-51. [PMID: 36351858 DOI: 10.1080/24733938.2022.2146178] [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] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
Abstract
Academy soccer players frequently train in the evening (i.e. 1700-2000 h), hence limited time to nutritionally prepare and recover due to schooling, travel and sleep schedules. Accordingly, we assessed timing and quantity of energy intake in the pre-training and post-training period. Over a 3-day in-season training period, male players (n=48; n=8 from under (U) 12, 13, 14, 15/16, 18 and 23 players) from an English Premier League academy self-reported dietary intake and physical activity levels (via the remote food photography method and activity diary, respectively) in the four hours pre- and post-training. Timing of pre-training energy intake ranged from 40 ± 28 mins (U15/U16 players) to 114 ± 71 mins (U18) before training and mean carbohydrate (CHO) intake ranged from 0.8±0.4 g.kg-1 (U23) to 1.5±0.9 g.kg-1 (U12). Timing of post-training energy intake ranged from 39 ± 27 mins (U14) to 70 ± 84 mins (U23) and mean CHO intake ranged from 1.6±0.8 g.kg-1 (U12) to 0.9±0.5 g.kg-1 (U14). In contrast to CHO, all age groups consumed sufficient protein intake in the post-training period (i.e. > 0.3 g.kg-1). We conclude academy soccer players habitually practice sub-optimal fuelling and recovery strategies, the consequence of which could impair growth, maturation and physical performance.
Collapse
Affiliation(s)
- Reuben G Stables
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Marcus P Hannon
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Nessan B Costello
- Carnegie Faculty, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, UK
| | - Sam J McHaffie
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Jazz S Sodhi
- Aston Villa Football Club, Bodymoor Heath Training Ground, Tamworth, UK
| | - Graeme L Close
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - James P Morton
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| |
Collapse
|
10
|
Cormier P, Meylan C, Agar-Newman D, Geneau D, Epp-Stobbe A, Lenetsky S, Klimstra M. A Systematic Review and Meta-Analysis of Wearable Satellite System Technology for Linear Sprint Profiling: Technological Innovations and Practical Applications. J Strength Cond Res 2024; 38:405-418. [PMID: 38088913 DOI: 10.1519/jsc.0000000000004689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
ABSTRACT Cormier, P, Meylan, C, Agar-Newman, D, Geneau, D, Epp-Stobbe, A, Lenetsky, S, and Klimstra, M. A systematic review and meta-analysis of wearable satellite system technology for linear sprint profiling: technological innovations and practical applications. J Strength Cond Res 38(2): 405-418, 2024-An emerging and promising practice is the use of global navigation satellite system (GNSS) technology to profile team-sports athletes in training and competition. Therefore, the purpose of this narrative systematic review with meta-analysis was to evaluate the literature regarding satellite system sensor usage for sprint modeling and to consolidate the findings to evaluate its validity and reliability. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, an electronic search of the databases, PubMed and SPORTDiscus (EBSCO), was conducted. Concurrent validity and reliability studies were considered, and 16 studies were retained for the review from the initial 1,485 studies identified. The effects on outcomes were expressed as standardized mean differences (SMDs, Cohen's d ) for each outcome (i.e., maximal sprint speed [MSS], the acceleration constant [τ], maximal theoretical velocity [ V0 ], relative force [ F0 ], and relative power [P max ]). Effect magnitudes represented the SMD between GNSS-derived and criterion-derived (i.e., radar and laser) and resulted in the following estimates: small for MSS ( d = 0.22, 95% CI 0.01 to 0.42), τ ( d = -0.18, 95% CI -0.60 to 0.23), V0 ( d = 0.14, 95% CI -0.08 to 0.36), relative F0 ( d = 0.15, 95% CI -0.25 to 0.55), and relative P max ( d = 0.21, 95% CI -0.16 to 0.58). No publication bias was identified in meta-analyzed studies and moderator analysis revealed that several factors (sampling rate and sensor manufacturer) influenced the results. Heterogeneity between studies was considered moderate to high. This highlighted the differences between studies in sensor technology differences (i.e., sampling rate, sensor fusion, and satellite network acquisition), processing techniques, criterion technology used, sprint protocols, outcome reporting, and athlete characteristics. These findings may be useful in guiding improvements in sprint modeling using GNSS technology and enable more direct comparisons in future research. Implementation of all-out linear sprint efforts with GNSS technology can be integrated into sport-specific sessions for sprint modeling when robust and consistent data processing protocols are performed, which has important implications for fatigue monitoring, program design, systematic testing, and rehabilitation in individual and team sports.
Collapse
Affiliation(s)
- Patrick Cormier
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, British Columbia, Canada
- Health and Athletic Performance Department, Canada Soccer, Ottawa, Ontario, Canada
| | - César Meylan
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada
- Toronto Football Club, Health and Performance Department, Toronto, Ontario, Canada; and
| | - Dana Agar-Newman
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, British Columbia, Canada
| | - Daniel Geneau
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, British Columbia, Canada
| | - Amarah Epp-Stobbe
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, British Columbia, Canada
| | - Seth Lenetsky
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- Toronto Football Club, Health and Performance Department, Toronto, Ontario, Canada; and
| | - Marc Klimstra
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, British Columbia, Canada
| |
Collapse
|
11
|
Martínez-Rodríguez A, Sánchez-Sánchez J, López-Fernández J, Lara-Cobos D, Sánchez-Sáez JA. A Global Positioning System Used to Monitor the Physical Performance of Elite Beach Handball Referees in a Spanish Championship. SENSORS (BASEL, SWITZERLAND) 2024; 24:827. [PMID: 38339543 PMCID: PMC10857188 DOI: 10.3390/s24030827] [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: 10/18/2023] [Revised: 01/10/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Abstract
Beach handball is a fully developed sporting discipline on all five continents which has attracted the attention of researchers in the last decade, resulting in a proliferation of different studies focusing on players but not on referees. The main objective of this cross-sectional research was to determine the physical demands on elite male beach handball referees in four different competitions: U18 male; U18 female; senior male; and senior female. Twelve elite federated male referees (age: 30.86 ± 8 years; body height: 175.72 ± 4.51 cm; body weight: 80.18 ± 17.99 kg; fat percentage: 20.1 ± 4.41%; national or international experience) belonging to the Technical Committee of the Royal Spanish Handball Federation were recruited for this the study. The physical demands required of referees in official matches were measured by installing a GPS device. The sampling frequency used to record their speed and distance was 15 Hz. A triaxial accelerometer (100 Hz) was used to determine their acceleration. An analysis of variance (ANOVA) between competitions with post hoc comparisons using the Bonferroni adjustment was used to compare among categories. A higher distance covered in zone 1 and speeds of 0 to 6 km-h-1 were recorded. Most accelerations and decelerations occurred in zones 0 and 1 (zone 0: 0 to 1 m·s-2; zone 1: 1 to 2 m·s-2). The lack of differences (p > 0.05) between most analysed variables suggest quite similar physical demands of the four analysed competitions. These results provide relevant information to design optimal training plans oriented to the real physical demands on referees in an official competition.
Collapse
Affiliation(s)
- Alejandro Martínez-Rodríguez
- Department of Analytical Chemistry, Nutrition and Food Science, Alicante Institute for Health and Biomedical Research (ISABIAL), University of Alicante, 03690 Alicante, Spain;
- European Institute of Exercise and Health (EIEH), University of Alicante, 03690 Alicante, Spain
| | - Javier Sánchez-Sánchez
- Universidad Europea de Madrid, Faculty of Sport Sciences, 28670 Madrid, Spain; (J.S.-S.); (J.L.-F.)
| | - Jorge López-Fernández
- Universidad Europea de Madrid, Faculty of Sport Sciences, 28670 Madrid, Spain; (J.S.-S.); (J.L.-F.)
| | - Daniel Lara-Cobos
- Beach Handball Section, Italian Handball Federation, 00135 Roma, Italy;
| | - Juan Antonio Sánchez-Sáez
- Grupo de Investigación GDOT—Gestión Deportiva, Ocio y Tecnología, Faculty of Sport, Catholic University of Murcia, 30107 Murcia, Spain
| |
Collapse
|
12
|
Powell C, Sparks M, Pienaar C. Positional and between quarter differences in physical demands of elite female field hockey players during international matches. Front Sports Act Living 2023; 5:1296752. [PMID: 38186396 PMCID: PMC10771826 DOI: 10.3389/fspor.2023.1296752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 11/23/2023] [Indexed: 01/09/2024] Open
Abstract
Objectives The main aims of this study were to examine whether there are positional- and between-quarter differences in the physical load of elite female field hockey players during international matches. Methods Twenty-three international female field hockey players were equipped with Global Positioning Systems devices, while competing over nine international matches. Results Players covered a mean relative distance, relative player load, and distance covered in the form of low-, moderate-, and high intensity activities of 107.5 m/min, 10.3 AU/min, 41.6%, 47.9%, and 9.9%, respectively. Defenders achieved the lowest relative Player load (ES: 0.8-1.1) and greatest distance covered in the form of low intensity activities compared to Midfielders and Forwards (ES: 0.8-0.9). Forwards and Midfielders covered significantly greater distance in the form of high intensity activity compared to Defenders (ES: 1.6-2.2). Significant reductions in relative distance, relative Player load, and moderate intensity activity are observed for all positions between Quarters 1-4 despite the availability of unlimited substitutions. However, players were able to maintain their high intensity activity throughout the match with no significant differences between Quarters 1-4. The majority of variables were higher (ES > 0.2) during Quarter 2 compared to Quarter 3, especially for Midfielders and Defenders. Conclusions Current findings provide further evidence on the positional- and between-quarter external match load of international female field hockey players that coaches should consider when designing training programs and drills to better prepare players for match demands. The results also provide some insight into the fatigue experienced by players and the possible pacing strategies they employ during matches. These findings support the need for re-warm-ups and may further influence how coaches time their substitutions to enhance running performance in future.
Collapse
Affiliation(s)
- Colin Powell
- Physical Activity, Sport and Recreation (PhASRec), North-West University, Potchefstroom Campus, Potchefstroom, South Africa
| | - Martinique Sparks
- Physical Activity, Sport and Recreation (PhASRec), North-West University, Potchefstroom Campus, Potchefstroom, South Africa
| | - Cindy Pienaar
- Department of Sport Studies, Faculty of Applied Sciences, Durban University of Technology, Durban, South Africa
| |
Collapse
|
13
|
Thome M, Thorpe RT, Jordan MJ, Nimphius S. Validity of Global Positioning System Technology to Measure Maximum Velocity Sprinting in Elite Sprinters. J Strength Cond Res 2023; 37:2438-2442. [PMID: 38015733 DOI: 10.1519/jsc.0000000000004567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
ABSTRACT Thome, M, Thorpe, RT, Jordan, MJ, and Nimphius, S. Validity of global positioning system (GPS) technology to measure maximum velocity sprinting in elite sprinters. J Strength Cond Res 37(12): 2438-2442, 2023-The objective of this study was to assess the concurrent validity of 10-Hz wearable Global Positioning System (GPS) technology to measure maximum velocity sprinting (Vmax) relative to Doppler radar in elite sprinters. Data were collected from a single training session performed by elite 100 and 200 m sprinters (males: n = 5; 100 m best times: 10.02 ± 0.07 seconds, range: 9.94-10.10 seconds; 200 m best times: 20.29 ± 0.42 seconds, range: 19.85-20.80 seconds; females: n = 2; age: 28.0 ± 4.2 years; body mass: 65.8 ± 4.6 kg; 100 m best times: 11.18 ± 0.34 seconds; 200 m best times: 22.53 ± 0.04 seconds). Velocity and time data from 16 maximal, 60-m sprint efforts were recorded simultaneously with 10 Hz GPS and 47 Hz radar. Validity was assessed using Bland-Altman 95% limits of agreement (LOA) and intraclass correlation coefficient (ICC), each with respective 95% confidence intervals (CI). Vmax measured with 10 Hz GPS demonstrated a LOA of -0.11 m·s-1 (-0.17, -0.05) and an ICC of 0.99 (0.98, 1.0) relative to the radar device.10 Hz GPS overestimated Vmax by 0.11 m·s-1 relative to the radar but could still be considered a suitable tool for monitoring external load in elite sprinters. However, the much smaller average annual improvement in this population (∼0.1-0.2%) in comparison with the ∼1% overestimation reduces the utility of 10 Hz GPS to detect meaningful performance changes in maximum velocity.
Collapse
Affiliation(s)
- Matthew Thome
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Western Australia
- Nebraska Athletic Performance Lab, University of Nebraska, Lincoln, Nebraska
| | - Robin T Thorpe
- Research Institute for Sport and Exercise Sciences, School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
- College of Health Solutions, Arizona State University, Phoenix, Arizona; and
| | - Matthew J Jordan
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Western Australia
- Faculty of Kinesiology, Sport Medicine Centre, University of Calgary, Calgary, Alberta, Canada
| | - Sophia Nimphius
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Western Australia
| |
Collapse
|
14
|
Sandmæl S, van den Tillaar R, Dalen T. Validity and Reliability of Polar Team Pro and Playermaker for Estimating Running Distance and Speed in Indoor and Outdoor Conditions. SENSORS (BASEL, SWITZERLAND) 2023; 23:8251. [PMID: 37837081 PMCID: PMC10574827 DOI: 10.3390/s23198251] [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: 09/10/2023] [Revised: 09/28/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023]
Abstract
Although global positioning systems and inertial measurement unit systems are often used to quantify physical variables in training, both types of systems need to be compared, considering their frequent use in measuring physical loads. Thus, the purpose of our study was to test the reliability and validity of speed and distance run measurements at different intensities in indoor and outdoor conditions made by Polar Team Pro and Playermaker. Four participants (age = 30.0 ± 5.1 years, body mass = 76.3 ± 5.3 kg, height = 1.79 ± 0.09 m), each wearing three Polar Team Pro and two Playermaker sensors, performed 100 m runs with different prescribed intensities (i.e., criterion measure) varying from 8 to 24 km h-1, in a straight line and/or rectangle under indoor and outdoor conditions. Both systems underestimated total distance; Playermaker underestimated speed, the extent of which increased as speed increased, while Polar Team Pro overestimated mean speed at 8 km h-1 for the straight-line condition. No differences emerged in mean speed estimated by Polar Team Pro at any intensities other than 20 km h-1, which was underestimated by 2%. The reliability of the sensors was good, given a coefficient of variation (CV) of <2% for all conditions except when measuring indoor conditions with Polar Team Pro (CV ≈ 10%). Intraclass correlations (ICCs) for consistency within the sensors varied from 0.47 to 0.99, and significantly lower ICCs were documented at 8, 10, and 12 km h-1. Both systems underestimated distance measured in indoor and outdoor conditions, and distance validity in different intensities seemed to worsen as speeds increased. Although Polar Team Pro demonstrated poor validity and reliability in indoor conditions, both systems exhibited good reliability between their sensors in outdoor conditions, whereas the reliability within their sensors varied with different speeds.
Collapse
|
15
|
Gabbett TJ. The "Worst-Case Scenario": Recovery Between Repeated High-Intensity Efforts in Rugby League Match-Play. Sports Health 2023; 15:689-694. [PMID: 36519242 PMCID: PMC10467472 DOI: 10.1177/19417381221139437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Repeated high-intensity effort (RHIE) activity is known to be a critical component of high-intensity, intermittent team sports. Despite the importance of this quality, there are few studies comparing the RHIE activity of higher- and lower-ranked teams competing in the same competition. This study characterized the distribution of recovery times between RHIE in Top 4 and Bottom 4 semi-elite rugby league players. HYPOTHESIS Players from Top 4 teams will engage in a greater frequency of RHIE bouts than Bottom 4 teams, with shorter recovery periods between consecutive efforts. STUDY DESIGN Cohort study. METHODS A total of 104 semi-elite rugby league players from 11 teams wore global positioning system units during 28 Queensland Cup rugby league matches. Recovery between efforts was classified as <10, 11 to 20, 21 to 30, 31 to 60, and 61 to 120 seconds. RESULTS The majority of RHIE bouts were performed with ≤10 seconds recovery between efforts for both Top 4 and Bottom 4 teams. Top 4 teams performed a greater proportion of RHIE bouts with ≤10 seconds recovery between efforts than Bottom 4 teams (effect size [ES], 0.27 ± 0.19), while only trivial differences (ES, 0.17 ± 0.20) were found between Top 4 and Bottom 4 teams for the proportion of RHIE with 61 to 120 seconds recovery between efforts. Wide-running forwards from Top 4 teams performed a greater proportion of RHIE bouts with ≤10 seconds recovery between efforts (ES, 0.59 ± 0.40) and a smaller proportion of RHIE bouts with 61 to 120 seconds recovery between efforts (ES, 0.62 ± 0.38) than wide-running forwards from Bottom 4 teams. CONCLUSION Rugby league players perform proportionally more RHIE bouts with ≤10 seconds recovery between efforts than any other recovery duration. In addition, Top 4 teams are more likely to complete a greater proportion of short (≤10 seconds) recovery RHIE bouts than Bottom 4 teams. CLINICAL RELEVANCE These findings demonstrate the demanding nature of RHIE activity in rugby league. To be successful, teams should train for these demanding passages of play.
Collapse
Affiliation(s)
- Tim J. Gabbett
- Gabbett Performance Solutions, Brisbane, Queensland, Australia
- Centre for Health Research, University of Southern Queensland, Ipswich, Queensland, Australia
- Institute of Health and Wellbeing, Federation University, Ballarat, Victoria, Australia
| |
Collapse
|
16
|
Irwin G, Rogatzki MJ, Wiltshire HD, Williams GKR, Gu Y, Ash GI, Tao D, Baker JS. Sports-Related Concussion Assessment: A New Physiological, Biomechanical, and Cognitive Methodology Incorporating a Randomized Controlled Trial Study Protocol. BIOLOGY 2023; 12:1089. [PMID: 37626975 PMCID: PMC10452437 DOI: 10.3390/biology12081089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 08/27/2023]
Abstract
BACKGROUND Taking part in moderate-to-vigorous exercise in contact sports on a regular basis may be linked to an increase in cerebrovascular injury and head trauma. Validated objective measures are lacking in the initial post-event diagnosis of head injury. The exercise style, duration, and intensity may also confound diagnostic indicators. As a result, we propose that the new Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) analyze a variety of functional (biomechanical and motor control) tests as well as related biochemistry to see how they are affected by contact in sports and head injury. The study's goal will be to look into the performance and physiological changes in rugby players after a game for head trauma and injury. METHODS This one-of-a-kind study will use a randomized controlled trial (RCT) utilizing a sport participation group and a non-participation control group. Forty male rugby 7 s players will be recruited for the study and allocated randomly to the experimental groups. The intervention group will participate in three straight rugby matches during a local 7 s rugby event. At the pre-match baseline, demographic and anthropometric data will be collected. This will be followed by the pre-match baseline collection of biochemical, biomechanical, and cognitive-motor task data. After three consecutive matches, the same measures will be taken. During each match, a notational analysis will be undertaken to obtain contact information. All measurements will be taken again 24, 48, and 72 h after the third match. DISCUSSION When the number of games increases owing to weariness and/or stressful circumstances, we expect a decline in body movement, coordination, and cognitive-motor tasks. Changes in blood biochemistry are expected to correspond to changes in biomechanics and cognitive-motor processes. This research proposal will generate considerable, ecologically valid data on the occurrence of head trauma events under game conditions, as well as the influence of these events on the biological systems of the performers. This will lead to a greater understanding of how sports participants react to exercise-induced injuries. This study's scope will have far-reaching ramifications for doctors, coaches, managers, scientists, and sports regulatory bodies concerned with the health and well-being of athletic populations at all levels of competition, including all genders and ages.
Collapse
Affiliation(s)
- Gareth Irwin
- Faculty of Sports Science, Ningbo University, Ningbo 315010, China; (G.I.); (Y.G.); (J.S.B.)
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo 315010, China
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF52YB, UK;
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
| | - Matthew J. Rogatzki
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
- Department of Health & Exercise Science, Appalachian State University, Boone, NC 28608, USA
| | - Huw D. Wiltshire
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF52YB, UK;
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
| | - Genevieve K. R. Williams
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
- Department of Sport and Health Sciences, University of Exeter, Exeter EX44QJ, UK
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo 315010, China; (G.I.); (Y.G.); (J.S.B.)
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo 315010, China
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
| | - Garrett I. Ash
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
- Section of General Internal Medicine, Yale School of Medicine, Yale University, New Haven, CT 06510, USA
- Center for Pain, Research, Informatics, Medical Comorbidities and Education Center (PRIME), VA Connecticut Healthcare System, West Haven, CT 06510, USA
| | - Dan Tao
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
- Department of Government and International Studies, Hong Kong Baptist University, Hong Kong 999077, China
| | - Julien S. Baker
- Faculty of Sports Science, Ningbo University, Ningbo 315010, China; (G.I.); (Y.G.); (J.S.B.)
- Research Academy of Medicine Combining Sports, Ningbo No.2 Hospital, Ningbo 315010, China
- Sport and Health Interdisciplinary Group in Movement & Performance from Acute & Chronic Head Trauma (IMPACT) Group, Cardiff Metropolitan University, Cardiff CF52YB, UK; (M.J.R.); (G.K.R.W.); (G.I.A.)
- Centre for Health and Exercise Science Research, Hong Kong Baptist University, Hong Kong 999077, China
| |
Collapse
|
17
|
Stables RG, Hannon MP, Jacob AD, Topping O, Costello NB, Boddy LM, Hambly C, Speakman JR, Sodhi JS, Close GL, Morton JP. Daily energy requirements of male academy soccer players are greater than age-matched non-academy soccer players: A doubly labelled water investigation. J Sports Sci 2023; 41:1218-1230. [PMID: 37811806 DOI: 10.1080/02640414.2023.2263707] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 09/20/2023] [Indexed: 10/10/2023]
Abstract
This study aimed to test the hypothesis that the total daily energy expenditure (TDEE) of male academy soccer players is greater than players not enrolled on a formalised academy programme. English Premier League academy (ACAD: n = 8, 13 years, 50 ± 6 kg, 88 ± 3% predicted adult stature, PAS) and non-academy players (NON-ACAD: n = 6, 13 years, 53 ± 12 kg, 89 ± 3% PAS) were assessed for TDEE (via doubly labelled water) during a 14-day in-season period. External loading was evaluated during training (ACAD: 8 sessions, NON-ACAD: 2 sessions) and games (2 games for both ACAD and NON-ACAD) via GPS, and daily physical activity was evaluated using triaxial accelerometry. Accumulative duration of soccer activity (ACAD: 975 ± 23 min, NON-ACAD: 397 ± 2 min; p < 0.01), distance covered (ACAD: 54.2 ± 8.3 km, NON-ACAD: 21.6 ± 4.7 km; p < 0.05) and time engaged in daily moderate-to-vigorous (ACAD: 124 ± 17 min, NON-ACAD: 79 ± 18 min; p < 0.01) activity was greater in academy players. Academy players displayed greater absolute (ACAD: 3380 ± 517 kcal · d-1, NON-ACAD: 2641 ± 308 kcal · d-1; p < 0.05) and relative TDEE (ACAD: 66 ± 6 kcal · kg · d-1, NON-ACAD: 52 ± 10 kcal · kg · d-1; p < 0.05) versus non-academy players. Given the injury risk associated with high training volumes during growth and maturation, data demonstrate the requirement for academy players to consume sufficient energy (and carbohydrate) intake to support the enhanced energy cost of academy programmes.
Collapse
Affiliation(s)
- Reuben G Stables
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Marcus P Hannon
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Adam D Jacob
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Oliver Topping
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Nessan B Costello
- Carnegie Faculty, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, UK
| | - Lynne M Boddy
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - Catherine Hambly
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - John R Speakman
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Jazz S Sodhi
- Bodymoor Heath Training Ground, Aston Villa Football Club, Tamworth, UK
| | - Graeme L Close
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| | - James P Morton
- Research Institute for Sport and Exercise Sciences (RISES), Liverpool John Moores University, Liverpool, UK
| |
Collapse
|
18
|
Izquierdo JM, Marqués-Jiménez D, Redondo JC. Running demands and tactical individual actions of wingers appear to depend on the playing formations within an amateur football team. Sci Rep 2023; 13:8927. [PMID: 37264075 DOI: 10.1038/s41598-023-36157-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 05/30/2023] [Indexed: 06/03/2023] Open
Abstract
We examine the differences in running performance demands and tactical individual actions for male amateur football wingers in four tactical formations: 4-2-3-1, 4-4-2, 3-5-2 and 3-4-2-1 during an entire season. Running demands were assessed in terms of: total distance run; distance traveled at 3 different speed ranges (Jogging, Running, and Sprinting); and number of accelerations registered in two different magnitude bands (Medium and High) while tactical individual actions were assessed through 3269 team match observations. 3-5-2 formation entails the highest running demands, exhibiting significant disparities in Jogging when compared to 4-2-3-1 and 3-5-2, in Sprinting when comparing 4-2-3-1 with both the 3-5-2 and the 3-4-2-1 formations. Moreover, the wingers in the 3-5-2 formation demonstrate the lowest scores in various tactical individual actions, including Shots: 3-5-2 vs. 3-4-2-1; Goal Area Shots: 3-5-2 vs. 3-4-2-1; and Dribbles: 3-5-2 vs. 3-4-2-1. Finally, wingers registered the highest levels of defensive tactical individual actions in 4-4-2 and 3-5-2. Findings suggest it would be of benefit for coaches to focus on formulating specific training plans to address the specific demands placed on wingers playing in these amateur matches and running performance demands and tactical individual actions should be considered together with tactical formation.
Collapse
Affiliation(s)
- José María Izquierdo
- Valoración del Rendimiento Deportivo, Actividad Física y Salud y Lesiones Deportivas (REDAFLED), Department of Didactics of Musical, Plastic and Corporal Expression, Faculty of Education, University of Valladolid, Soria, Spain.
| | - Diego Marqués-Jiménez
- Valoración del Rendimiento Deportivo, Actividad Física y Salud y Lesiones Deportivas (REDAFLED), Department of Didactics of Musical, Plastic and Corporal Expression, Faculty of Education, University of Valladolid, Soria, Spain
| | - Juan Carlos Redondo
- Department of Physical Education and Sports, University of León, León, Spain
| |
Collapse
|
19
|
Burghardt WP, Pfeiffer KA, Kuenze C. Assessing the Relationship Between External Workloads and Noncontact Injuries During Summer Conditioning and Preseason Practice in National Collegiate Athletic Association Division 1 Football Players. J Strength Cond Res 2023; 37:816-822. [PMID: 35876439 DOI: 10.1519/jsc.0000000000004325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Burghardt, WP, Pfeiffer, KA, and Kuenze, C. Assessing the relationship between external workloads and noncontact injuries during summer conditioning and preseason practice in National Collegiate Athletic Association Division 1 football players. J Strength Cond Res 37(4): 816-822, 2023-The purpose of this study was to prospectively investigate the relationship between noncontact injuries and workload in collegiate football during summer conditioning and preseason training. Workload and noncontact injury data were collected over the summer conditioning and preseason practice periods for a Division 1 National Collegiate Athletic Association football team ( n = 34). Seven- and 21-day exponentially weighted moving averages (EWMA) were calculated daily for each athlete. The acute:chronic ratio (A:C ratio) of these 2 measures was also calculated daily. Injury rates for noncontact injuries were calculated for both periods. Continuous variable modeling (panel logistic regression and restricted cubic spline) was used to assess the relationship of EWMA A:C ratio and noncontact injury using a 3-day lag period. Athletic exposures (AEs) were defined as individual sport training, practice, or competition sessions. Nine injuries were observed (6.97/1,000 AEs), with 4 injuries resulting in lost time (3.09/1,000 AEs). The mean EWMA A:C ratio was 0.92 ± 0.41 (95% confidence interval: 0.03-2.09). Both the panel logistic regression and the restricted cubic spline models showed a significant relationship between EWMA A:C ratio and noncontact injuries. However, the odds ratio (14.16) in the logistic regression had a very large standard error (14.51) and a wide 95% confidence interval (1.90-105.49). The restricted cubic spline model had a pseudo R2 of 0.136. Injury occurrence at given EWMA ratio values was lower than reported in previous research. Although both continuous models demonstrated a significant relationship between the EWMA A:C ratio and subsequent noncontact injuries over the next 3 days, neither model had sufficient goodness of fit to warrant adoption at this time.
Collapse
Affiliation(s)
- William P Burghardt
- Department of Kinesiology, Michigan State University, East Lansing, Michigan
| | | | | |
Collapse
|
20
|
Wintershoven K, Beaven CM, Gill ND, McMaster DT. New Zealand Youth Rugby Sevens: A Comparative Match Demands Study. J Funct Morphol Kinesiol 2023; 8:jfmk8020041. [PMID: 37092373 PMCID: PMC10123691 DOI: 10.3390/jfmk8020041] [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: 02/04/2023] [Revised: 03/16/2023] [Accepted: 03/27/2023] [Indexed: 04/25/2023] Open
Abstract
Rugby sevens has established itself on the world stage since its inclusion in the 2016 Olympics. Participation among New Zealand (NZ) youth has surged. Sevens games have specific high demands, but little is known about these competitive demands in regards to youth. Two NZ male youth squads (U15, n = 13; U19, n = 14) were monitored during a national sevens tournament. Microsensor technology captured heart rate (HR) and kinematic performance. The rating of perceived exertion (RPE) was collected for U15 matches only. U19 and U15 players ran 108 ± 11 and 116 ± 13 m·min-1 at an average speed (VAVG) of 6.5 ± 0.6 and 6.9 ± 0.8 km·h-1. Peak speeds (VPEAK) reached 33.7 km·h-1, and high-intensity running distance (HIRD) averaged 252 ± 102 m. U15 (44.3 ± 9.2 game-1) and U19 (39.4 ± 6.1 game-1) showed different sprint rates. U15 covered more moderate-velocity distance (20-80% VMAX) and less low-velocity distance (<20% VMAX). RPE was 13 ± 1 (U15). An average HR of 90.0 ± 3.9% HRMAX was recorded. Upwards of 57% of game time was played at >95% HRMAX. Youth sevens competition is specifically demanding. U15 can experience greater loads than older peers in rugby. Coaches can use this information to optimize players' physical development.
Collapse
Affiliation(s)
- Koen Wintershoven
- Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Mount Maunganui, Tauranga 3116, New Zealand
| | - Christopher Martyn Beaven
- Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Mount Maunganui, Tauranga 3116, New Zealand
| | - Nicholas David Gill
- Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Mount Maunganui, Tauranga 3116, New Zealand
- All Blacks, New Zealand Rugby Union, Wellington 6011, New Zealand
| | - Daniel Travis McMaster
- Te Huataki Waiora School of Health, University of Waikato, Adams Centre for High Performance, Mount Maunganui, Tauranga 3116, New Zealand
- All Blacks & Black Ferns Sevens, New Zealand Rugby Union, Wellington 6011, New Zealand
| |
Collapse
|
21
|
Piñero JÁ, Chena M, Zapardiel JC, Roso-Moliner A, Mainer-Pardos E, Lampre M, Lozano D. Relative Individual Sprint in Most Demanding Passages of Play in Spanish Professional Soccer Matches. Sports (Basel) 2023; 11:sports11040072. [PMID: 37104146 PMCID: PMC10141546 DOI: 10.3390/sports11040072] [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: 02/06/2023] [Revised: 03/10/2023] [Accepted: 03/20/2023] [Indexed: 04/28/2023] Open
Abstract
(1) Background: The objective of this research was to analyse the most demanding passages (MDP) considering the sprint variable relative to the maximum level of sprint ability of each player as a function of player position, final outcome and part of the match during the competitive phase of a professional soccer season. (2) Methods: Global positioning system (GPS) data were collected from 22 players according to their playing position in the last 19 match days of the Spanish La Liga professional soccer in the 2020/2021 season. MDP were calculated from 80% of the maximum sprint speed of each player. (3) Results: Wide midfielders covered the greatest distance at >80% of the maximum speed (2.4 ± 1.63 seg) and the longest duration (21.91 ± 13.35 m) in their MDP. When the whole team was losing, it demonstrated greater distances (20.23 ± 13.04 m) and longer durations (2.24 ± 1.58 seg) compared to games in which it was winning. When the team ended up drawing, the relative sprint distance covered in the second half was significantly greater than in the first (16.12 ± 21.02; SD = 0.26 ± 0.28 (-0.03/-0.54). (4) Conclusions: Different demands of MDP, according to the sprint variable relative to the maximum individual capacity in competition, are required when contextual game factors are considered.
Collapse
Affiliation(s)
| | - Marcos Chena
- Facultad de Ciencias del Deporte de Toledo, Universidad de Castilla La Mancha, 13001 Ciudad Real, Spain
- Faculty of Medicine and Health Sciences, Campus Universitario-C/19, University of Alcalá, Av. de Madrid, Km 33,600, 28871 Madrid, Spain
| | - Juan Carlos Zapardiel
- Faculty of Medicine and Health Sciences, Campus Universitario-C/19, University of Alcalá, Av. de Madrid, Km 33,600, 28871 Madrid, Spain
| | - Alberto Roso-Moliner
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| | - Elena Mainer-Pardos
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| | - Miguel Lampre
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| | - Demetrio Lozano
- Faculty of Health Sciences, San Jorge University, Autovía A23 Km 299, 20830 Villanueva de Gállego, 50830 Zaragoza, Spain
| |
Collapse
|
22
|
Gibson N, Drain JR, Larsen P, Williams S, Groeller H, Sampson JA. Subjective Measures of Workload and Sleep in Australian Army Recruits; Potential Utility as Monitoring Tools. Mil Med 2023; 188:670-677. [PMID: 34986241 DOI: 10.1093/milmed/usab551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/05/2021] [Accepted: 12/24/2021] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Subjective measures may offer practitioners a relatively simple method to monitor recruit responses to basic military training (BMT). Yet, a lack of agreement between subjective and objective measures may presents a problem to practitioners wishing to implement subjective monitoring strategies. This study therefore aims to examine associations between subjective and objective measures of workload and sleep in Australian Army recruits. MATERIALS AND METHODS Thirty recruits provided daily rating of perceived exertion (RPE) and differential RPE (d-RPE) for breathlessness and leg muscle exertion each evening. Daily internal workloads determined via heart rate monitors were expressed as Edwards training impulse (TRIMP) and average heart rate. External workloads were determined via global positioning system (PlayerLoadTM) and activity monitors (step count). Subjective sleep quality and duration was monitored in 29 different recruits via a customized questionnaire. Activity monitors assessed objective sleep measures. Linear mixed-models assessed associations between objective and subjective measures. Akaike Information Criterion assessed if the inclusion of d-RPE measures resulted in a more parsimonious model. Mean bias, typical error of the estimate (TEE) and within-subject repeated measures correlations examined agreement between subjective and objective sleep duration. RESULTS Conditional R2 for associations between objective and subjective workloads ranged from 0.18 to 0.78, P < 0.01, with strong associations between subjective measures of workload and TRIMP (0.65-0.78), average heart rate (0.57-0.73), and PlayerLoadTM (0.54-0.68). Including d-RPE lowered Akaike Information Criterion. The slope estimate between objective and subjective measures of sleep quality was not significant. A trivial relationship (r = 0.12; CI -0.03, 0.27) was observed between objective and subjective sleep duration with subjective measures overestimating (mean bias 25 min) sleep duration (TEE 41 min). CONCLUSIONS Daily RPE offers a proxy measure of internal workload in Australian Army recruits; however, the current subjective sleep questionnaire should not be considered a proxy measure of objective sleep measures.
Collapse
Affiliation(s)
- Neil Gibson
- Centre for Medical and Exercise Physiology, Faculty of Science, Medicine and Health University of Wollongong, Wollongong, NSW 2522, Australia
| | - Jace R Drain
- Land Division, Defence Science and Technology Group, Fishermans Bend, VIC 3207, Australia
| | - Penelope Larsen
- Centre for Medical and Exercise Physiology, Faculty of Science, Medicine and Health University of Wollongong, Wollongong, NSW 2522, Australia
| | - Sean Williams
- Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Herbert Groeller
- Centre for Medical and Exercise Physiology, Faculty of Science, Medicine and Health University of Wollongong, Wollongong, NSW 2522, Australia
| | - John A Sampson
- Centre for Medical and Exercise Physiology, Faculty of Science, Medicine and Health University of Wollongong, Wollongong, NSW 2522, Australia
| |
Collapse
|
23
|
Medbø JI, Ylvisåker E. Examination of the ZXY Arena Tracking System for Association Football Pitches. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23063179. [PMID: 36991890 PMCID: PMC10056700 DOI: 10.3390/s23063179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/13/2023] [Accepted: 03/13/2023] [Indexed: 05/21/2023]
Abstract
Modern analyses of football games require precise recordings of positions and movements. The ZXY arena tracking system reports the position of players wearing a dedicated chip (transponder) at high time resolution. The main issue addressed here is the quality of the system's output data. Filtering the data to reduce noise may affect the outcome adversely. Therefore, we have examined the precision of the data given, possible influence by sources of noise, the effect of the filtering, and the accuracy of the built-in calculations. The system's reported positions of the transponders at rest and during different types of movements, including accelerations, were recorded and compared with the true positions, speeds, and accelerations. The reported position has a random error of ≈0.2 m, defining the system's upper spatial resolution. The error in signals interrupted by a human body was of that magnitude or less. There was no significant influence of nearby transponders. Filtering the data delayed the time resolution. Consequently, accelerations were dampened and delayed, causing an error of 1 m for sudden changes in position. Moreover, fluctuations of the foot speed of a running person were not accurately reproduced, but rather, averaged over time periods >1 s. Results calculated from measured values appeared accurate and were readily reproduced in a spreadsheet output. In conclusion, the ZXY system reports the position with little random error. Its main limitation is caused by averaging of the signals.
Collapse
|
24
|
Pillitteri G, Giustino V, Messina G, Petrucci M, Rossi A, Bellafiore M, Iovane A, Thomas E, Bianco A, Palma A, Battaglia G. Comparison of external load indicators between official matches and sport-specific training in semi-professional soccer players: focus on intensity and strength. J Sports Med Phys Fitness 2023; 63:385-393. [PMID: 36205088 DOI: 10.23736/s0022-4707.22.14189-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND The aim of this study was to investigate any differences in external load indicators (ELi) between official matches (OM) and sport-specific tasks in semi-professional soccer players. METHODS Among 28 semi-professional soccer players, 1932 observations (age: 25±6 years, height: 183±6 cm, weight: 75.2±7 kg; FC Palermo, Palermo, Italy) were collected through GPS devices (Qstarz BT-Q1000EX, 10 Hz; Qstarz International Co., Ltd., Taipei, Taiwan) and the related software (LaGalaColli V: 8.6.4.3; Spinitalia Srl, Rome, Italy) during the season 2019-2020. Participants were monitored during OM, friendly matches (FM), small sided games (SSG), and match-based exercises (MBE), considering the percentage of intense accelerations (%int. acc.), percentage of intense decelerations (%int. dec.), and passive recovery time /min (PrT/m) as Eli. RESULTS We detected the highest mean value for PrT/m in OM and the lowest in MBE and SSG (18.36±4.38 and 13.4±5.26 and 13.4±4.29 (s/min), respectively). The lowest mean values of %int. acc. and %int. dec. were found in OM and the highest in SSG (8.64±1.52 vs. 13.02±3.14 and 9.25±1.56 vs. 15.68±3.14, for %int. acc. and %int. dec., respectively). Significant differences between the four tasks for all the ELi considered (P<0.001). The post-hoc pairwise comparisons revealed significant differences for all the ELi between all tasks (P<0.001) except for the %int. acc. between MBE vs. FM (P=0.003). No significant difference was found in PrT/m between MBE vs. FM and SSG vs. FM. CONCLUSIONS ELi are in accordance with the performance model by achieving better values in training than OM, suggesting the fundamental role of GPS for monitoring external load in soccer.
Collapse
Affiliation(s)
- Guglielmo Pillitteri
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy.,Program in Health Promotion and Cognitive Sciences, University of Palermo, Palermo, Italy.,Palermo FC, Palermo, Italy
| | - Valerio Giustino
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Giuseppe Messina
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy -
| | | | - Alessio Rossi
- Department of Computer Science, University of Pisa, Pisa, Italy
| | - Marianna Bellafiore
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Angelo Iovane
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Ewan Thomas
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Antonino Bianco
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Antonio Palma
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Giuseppe Battaglia
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| |
Collapse
|
25
|
Casey JC, Daniels AH. CORR Synthesis: How Have Film Review and Motion Analysis Been Used to Enhance Orthopaedic Surgical Performance? Clin Orthop Relat Res 2023; 481:564-579. [PMID: 36719752 PMCID: PMC9928675 DOI: 10.1097/corr.0000000000002506] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 11/02/2022] [Indexed: 02/01/2023]
Affiliation(s)
- Jack C. Casey
- Division of Orthopaedics, Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - Alan H. Daniels
- Division of Orthopaedics, Warren Alpert Medical School of Brown University, Providence, RI, USA
| |
Collapse
|
26
|
External load profile during different sport-specific activities in semi-professional soccer players. BMC Sports Sci Med Rehabil 2023; 15:22. [PMID: 36814322 PMCID: PMC9945412 DOI: 10.1186/s13102-023-00633-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 02/15/2023] [Indexed: 02/24/2023]
Abstract
BACKGROUND Global Positioning System (GPS) devices are widely used in soccer for monitoring external load (EL) indicators with the aim of maximizing sports performance.The aim of this study was to investigate the EL indicators differences in players of different playing positions (i.e., central backs, external strikers, fullbacks, midfielders, strikers, wide midfielder) between and within different sport-specific tasks and official matches. METHODS 1932 observations from 28 semi-professional soccer players (age: 25 ± 6 years, height: 183 ± 6 cm, weight: 75.2 ± 7 kg) were collected through GPS devices (Qstarz BT-Q1000EX, 10 Hz) during the season 2019-2020. Participants were monitored during Official Match (OM), Friendly Matches (FM), Small Sided Games (SSG), and Match-Based Exercises (MBE). Metabolic (i.e., metabolic power, percentage of metabolic power > 35w, number of intense actions per minute, distance per minute, passive recovery time per minute) and neuromuscular indicators (i.e., percentage of intense accelerations, percentage of intense decelerations, change of direction per min > 30°) were recorded during each task. RESULTS Statistically significant differences were detected in EL indicators between playing positions within each task and between tasks. In particular, results from the two-way ANOVA tests showed significant interaction, but with small effect size, in all the EL indicators between playing positions for each task and within tasks. Moreover, statistical differences, but with small effect size, between playing positions were detected in each task and for each EL indicator. Finally, the strongest statistical differences (with large effect size) were detected between tasks for each EL indicator. Details of the Tukey post-hoc analysis reporting the pairwise comparisons within and between tasks with playing positions are also provided. CONCLUSION In semi-professional soccer players, different metabolic and neuromuscular performance were detected in different playing position between and within different tasks and official matches. Coaches should consider the different physical responses related to different physical tasks and playing position to design the most appropriate training program.
Collapse
|
27
|
Match Load Physical Demands in U-19 Professional Soccer Players Assessed by a Wearable Inertial Sensor. J Funct Morphol Kinesiol 2023; 8:jfmk8010022. [PMID: 36810506 PMCID: PMC9953515 DOI: 10.3390/jfmk8010022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/23/2023] [Accepted: 01/29/2023] [Indexed: 02/24/2023] Open
Abstract
BACKGROUND Wearable inertial sensors are poorly used in soccer to monitor external load (EL) indicators. However, these devices could be useful for improving sports performance and potentially reducing the risk of injury. The aim of this study was to investigate the EL indicators (i.e., cinematic, mechanical, and metabolic) differences between playing positions (i.e., central backs, external strikers, fullbacks, midfielders, and wide midfielder) during the first half time of four official matches (OMs). METHODS 13 young professional soccer players (Under-19; age: 18.5 ± 0.4 years; height: 177 ± 6 cm; weight: 67 ± 4.8 kg) were monitored through a wearable inertial sensor (TalentPlayers TPDev, firmware version 1.3) during the season 2021-2022. Participants' EL indicators were recorded during the first half time of four OMs. RESULTS significant differences were detected in all the EL indicators between playing positions except for two of them (i.e., distance traveled in the various metabolic power zones (<10 w) and the number of direction changes to the right >30° and with speed >2 m). Pairwise comparisons showed differences in EL indicators between playing positions. CONCLUSIONS Young professional soccer players showed different loads and performances during OMs in relation to playing positions. Coaches should consider the different physical demands related to playing positions in order to design the most appropriate training program.
Collapse
|
28
|
Draper G, Wright MD, Ishida A, Chesterton P, Portas M, Atkinson G. Do environmental temperatures and altitudes affect physical outputs of elite football athletes in match conditions? A systematic review of the 'real world' studies. SCI MED FOOTBALL 2023; 7:81-92. [PMID: 35068376 DOI: 10.1080/24733938.2022.2033823] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Players involved in the various football codes compete throughout the calendar year around the world. Therefore, environmental stressors such as temperature and altitude should be considered in preparation for, and during, matches. We aimed to systematically review the observational and quasi-experimental studies that have been specifically designed to quantify the effects of temperature (hot or cold) high altitude on in-match physical performance indicators. A search of electronic databases (Web of Science, Scopus, SPORTDiscus, PubMed/MEDLINE) was conducted, with 19,424 papers identified as relevant. Following sifting in relation to the eligibility criteria, 12 papers were deemed directly relevant. The reviewed studies scored 6-9 (on a 0-9 scale) for quality assessment using a previously used scale. The major outcome variables relevant to the current review were total distance (m), high-speed running (m) and high-speed runs (count) measured during matches. Standardized effect sizes (ES) were heterogeneous across studies for total distance (ES: -0.96 to -0.14) and high-speed running (ES: -0.69 to 0.12) for >1000 m vs sea-level, time spent at the given altitude being a putative factor for this heterogeneity. Heat had mainly detrimental effects on performance, but ES were, again, heterogeneous across studies (ES: -1.25 to 0.26), dependent on temperature. Given the small number of studies that involved mostly male athletes, and large heterogeneity across studies, more research needs be conducted on physical performance in these environmental conditions, with attention paid to standardizing outcomes and broadening the approaches of studies to guide future decision-making in professional sporting environments.
Collapse
Affiliation(s)
- Garrison Draper
- School of Health and Life Sciences, Teesside University, Middlesbrough, UK.,Philadelphia Union, Major League Soccer (MLS), Philadelphia, Pennsylvania, USA
| | - Matthew D Wright
- School of Health and Life Sciences, Teesside University, Middlesbrough, UK
| | - Ai Ishida
- Philadelphia Union, Major League Soccer (MLS), Philadelphia, Pennsylvania, USA.,College of Health Sciences and Professions, Ohio University, Athens, Ohio, USA
| | - Paul Chesterton
- School of Health and Life Sciences, Teesside University, Middlesbrough, UK
| | - Matthew Portas
- School of Health and Life Sciences, Teesside University, Middlesbrough, UK
| | - Greg Atkinson
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| |
Collapse
|
29
|
Vial S, Wilkie JC, Turner M, Scanlan M, Blazevich AJ. Does fatigue influence joint-specific work and ground force production during the first steps of maximal acceleration? Scand J Med Sci Sports 2023; 33:894-906. [PMID: 36650696 DOI: 10.1111/sms.14318] [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: 07/11/2022] [Revised: 12/29/2022] [Accepted: 01/10/2023] [Indexed: 01/19/2023]
Abstract
During initial acceleration, the first steps of a maximal-effort (sprint) run often determine success or failure in the capture and evasion of an opponent, and is therefore a vital factor of success in many modern sports. However, accelerative events are commonly performed after having already run considerable distances, and the associated fatigue should impair muscle force production and thus reduce acceleration. Despite this, the effects of running-induced fatigue on our ability to accelerate as well as the running technique used to achieve it have received little attention. We recorded 3-D kinematics and ground reaction forces during the first three steps of the acceleration phase from a standing start before and after performing a high-speed, multi-directional, fatiguing run-walk protocol in well-trained running athletes who were habituated to accelerative sprinting. We found that the athletes were able to maintain their acceleration despite changing running technique, which was associated with use of a more upright posture, longer ground contact time, increased vertical ground reaction impulse, decreased hip flexion and extension velocities, and a shift in peak joint moments, power, and positive work from the hip to the knee joint; no changes were detected in ankle joint function. Thus, a compensatory increase in knee joint function alleviated the reduction in hip flexor-extensor capacity. These acute adaptations may indicate that the hip extensors (gluteal and hamstring muscle groups) were more susceptible to fatigue than the ankle and knee musculature, and may thus be a primary target for interventions promoting fatigue resistance.
Collapse
Affiliation(s)
- Shayne Vial
- Centre for Human Performance, School of Medical and Health Science, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Jodie Cochrane Wilkie
- Centre for Human Performance, School of Medical and Health Science, Edith Cowan University, Joondalup, Western Australia, Australia.,Physical Activity, Sport and Exercise Research Theme, Faculty of Health, Southern Cross University, Lismore, Queensland, Australia
| | - Mitchell Turner
- Centre for Precision Health, School of Medical and Health Science, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Mark Scanlan
- Centre for Human Performance, School of Medical and Health Science, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Anthony J Blazevich
- Centre for Human Performance, School of Medical and Health Science, Edith Cowan University, Joondalup, Western Australia, Australia
| |
Collapse
|
30
|
How Football Players' Age Affect Passing Patterns of Play According to Field Location. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10010157. [PMID: 36670707 PMCID: PMC9856864 DOI: 10.3390/children10010157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
This study aimed to characterize the passing patterns that support collective tactical behaviour in football players of different ages (U15, U17, and U19) in different field zones. Two hundred and twenty-eight male players, divided into U15, U17, and U19, participated in the study. Cluster analysis was used to group the passes into three sizes (short, medium, and long). The chi-square test was used to analyse the effect of player age on game-passing patterns in each field zone. The results revealed that long and medium passes were used more in areas close to the goals and short passes in the middle area of the field, concerning all ages (p < 0.001). Furthermore, the analysis of the relative distance between the ball carrier and the receiver indicated that older players (U17 and U19) used more distant players to pass the ball in medium and long passes. These results can help coaches design small-sided games according to the players’ ages and adjust to the field’s space and the numerical relationship, thus creating a greater transfer from training to competition.
Collapse
|
31
|
Zlojutro N, Eler S, Joksimovic M, Eler N, Marković S, Kukrić A, Goranovic K. Kinematic parameters and metabolic power in elite soccer players: A small sided a large sided games comparison. Front Physiol 2023; 14:1150713. [PMID: 37089420 PMCID: PMC10119402 DOI: 10.3389/fphys.2023.1150713] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 03/27/2023] [Indexed: 04/25/2023] Open
Abstract
Introduction: The goal of this paper is to determine what happens in one minute (on average) in kinematic parameters and metabolic power in small sided games (SSG) (3v3; 5v5) and large sided games (LSG) (10v10) and in which games kinematic parameters and metabolic power are best developed. Methods: The participants of this study were 22 professional football players, height 182.95±6.52 cm, mass 77.17±8.21 kg, body mass index (BMI) 22.97±1.47 kg/m2, body fat 9.85±2.55 %, aged 27.1±5.4 yrs, who played in the Premier League of Bosnia and Herzegovina. Data total distance (TD), maximum speed (MS), number of accelerations (nAcc), number of decelerations (nDec), number of sprints (nS), high intensity distance (Z4≥19.8 km/h), sprint distance (Z5≥25.2 km/h) and movements requiring a certain metabolic power (Pmet), were collected using a 20 Hz Global positioning system (GPS) system Pro2 (GPEXE, Exelio srl, Udine, Italy), on a total of 307 individual observations. Results: The results showed that the average total distance was significantly higher in the 5v5 (135.16±18.78 m) and 10v10 (133.43±20.06 m) games (F=64.26, p<0.001) compared to the 3v3 (108.24±11.26 m). Furthermore, the values of the variables Z4 (8.32±3.38 m, F=97.59), Z5 (1.84±1.53 m, F=123.64), nS (0.13±0.10 n, F=96.14) as well as Maxspeed (27.06±1.90 km/h, F=139.33), are statistically significantly higher (p<0.001) in the 10v10 game compared to the other two game formats. The average number of nAcc (0.40±0.32 n, F=9.86, p<0.001) and nDec (0.62±0.36 n, F=6.42, p<0.001) is statistically significantly higher in the 5v5 game. The results showed that the 5v5 game is significantly more metabolically demanding Pmet (2.76±0.67 W•kg-1, F=66.08, p<0.001) compared to the other two game formats. Discussion: The data presented in this paper can be used as a basis for the construction of specific exercises based on kinematic and physiological requirements, and for planning and programming microcycles in football.
Collapse
Affiliation(s)
- Nemanja Zlojutro
- Faculty of Physical Education and Sport, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - Serdar Eler
- Faculty of Sport Science, Gazi University, Ankara, Ankara, Türkiye
| | - Marko Joksimovic
- Faculty of Sports and Physical Education, University of Montenegro, Niksic, Montenegro
- *Correspondence: Marko Joksimovic,
| | - Nebahat Eler
- Vocational School of Physical Education and Sports, Bülent Ecevit University, Zonguldak, Zonguldak, Türkiye
| | - Saša Marković
- Faculty of Physical Education and Sport, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - Aleksandar Kukrić
- Faculty of Physical Education and Sport, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - Kosta Goranovic
- Faculty of Sports and Physical Education, University of Montenegro, Niksic, Montenegro
| |
Collapse
|
32
|
Zanin M, Azzalini A, Ranaweera J, Weaving D, Darrall-Jones J, Roe G. The contributing external load factors to internal load during small-sided games in professional rugby union players. Front Sports Act Living 2023; 5:1092186. [PMID: 36873663 PMCID: PMC9975384 DOI: 10.3389/fspor.2023.1092186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 01/24/2023] [Indexed: 02/17/2023] Open
Abstract
Introduction This study aimed to investigate which external load variables were associated with internal load during three small-sided games (SSG) in professional rugby union players. Methods Forty professional rugby union players (22 forwards, 18 backs) competing in the English Gallagher Premiership were recruited. Three different SSGs were designed: one for backs, one for forwards, and one for both backs and forwards. General linear mixed-effects models were implemented with internal load as dependent variable quantified using Stagno's training impulse, and external load as independent variables quantified using total distance, high-speed (>61% top speed) running distance, average acceleration-deceleration, PlayerLoad™, PlayerLoad™ slow (<2 m·s-1), number of get-ups, number of first-man-to-ruck. Results Internal load was associated with different external load variables dependent on SSG design. When backs and forwards were included in the same SSG, internal load differed between positional groups (MLE = -121.94, SE = 29.03, t = -4.20). Discussion Based on the SSGs investigated, practitioners should manipulate different constraints to elicit a certain internal load in their players based on the specific SSG design. Furthermore, the potential effect of playing position on internal load should be taken into account in the process of SSG design when both backs and forwards are included.
Collapse
Affiliation(s)
- Marco Zanin
- Carnegie Applied Rugby Research Centre, Leeds Beckett University, Leeds, United Kingdom.,Performance Department, Bath Rugby Football Club, Bath, United Kingdom
| | - Adelchi Azzalini
- Dipartimento di Scienze Statistiche, Università Degli Studi di Padova, Padua, Italy
| | - Jayamini Ranaweera
- Carnegie Applied Rugby Research Centre, Leeds Beckett University, Leeds, United Kingdom.,Performance Department, Bath Rugby Football Club, Bath, United Kingdom
| | - Dan Weaving
- Performance Department, Leeds Rhinos Rugby League Club, Leeds, United Kingdom
| | - Joshua Darrall-Jones
- Carnegie Applied Rugby Research Centre, Leeds Beckett University, Leeds, United Kingdom
| | - Gregory Roe
- Carnegie Applied Rugby Research Centre, Leeds Beckett University, Leeds, United Kingdom.,Performance Department, Bath Rugby Football Club, Bath, United Kingdom
| |
Collapse
|
33
|
Brosnan RJ, Watson G, Stuart W, Twentyman C, Kitic CM, Schmidt M. The Validity, Reliability, and Agreement of Global Positioning System Units-Can We Compare Research and Applied Data? J Strength Cond Res 2022; 36:3330-3338. [PMID: 34593728 DOI: 10.1519/jsc.0000000000004139] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
ABSTRACT Brosnan, RJ, Watson, G, Stuart, W, Twentyman, C, Kitic, CM, and Schmidt, M. The validity, reliability, and agreement of GPS units-Can we compare research and applied data? J Strength Cond Res 36(12): 3330-3338, 2022-This study's aim was to investigate the validity, within-brand interunit reliability, and between-brand agreement of movement indicators from 3 commonly used global positioning system (GPS) units used in applied and research settings. Forty-two units (GPSports EVO; 10 Hz, n = 13: GPSports HPU; 5 Hz, n = 14: and Catapult S5; 10 Hz, n = 15) were investigated across 3 experiments: a 40-m linear track with all units pushed on a trolley, a sport simulation circuit with all units pulled on a sled, and a similar circuit with 3 models of units placed in a modified GPS vest worn by an athlete between the scapulae. Distance, speed, and acceleration indices were obtained and analyzed with the level of significance set ( ρ < 0.05). The results demonstrated good to moderate (% mean difference; 0-6.5%) validity with criterion and good (coefficient of variation [CV] ± 90% confidence interval [CI]: 0-3.9%) interunit reliability for distance and speed in units. Ten hertz units demonstrated good to moderate (CV ± 90% CI: 0.21-5.58%) interunit reliability in all acceleration and deceleration measures, with 5 Hz units having good to poor (CV ± 90% CI: 4.54-12.78%) results. Agreement ranged from good to moderate (% mean difference; 0.01-7.8%) for distance, speed, and absolute acceleration/deceleration. Agreement ranged from good to poor (% mean difference; 2.21-32.74%) in average acceleration. The GPS units investigated can be compared within and between applied and research settings for distance and speed. However, caution is warranted in acceleration indices. This highlights the importance of testing other commonly used GPS models and brands.
Collapse
Affiliation(s)
- Ross J Brosnan
- Sports and Performance Optimisation Research Team, University of Tasmania, Hobart, Australia.,School of Health Sciences, University of Tasmania, Hobart, Australia
| | - Greig Watson
- Sports and Performance Optimisation Research Team, University of Tasmania, Hobart, Australia.,School of Health Sciences, University of Tasmania, Hobart, Australia
| | - Will Stuart
- Australian Rugby Football Union, New South Wales; and
| | | | - Cecilia M Kitic
- Sports and Performance Optimisation Research Team, University of Tasmania, Hobart, Australia.,School of Health Sciences, University of Tasmania, Hobart, Australia
| | - Matthew Schmidt
- Sports and Performance Optimisation Research Team, University of Tasmania, Hobart, Australia.,School of Health Sciences, University of Tasmania, Hobart, Australia
| |
Collapse
|
34
|
Cuong Le C, Ma'ayah F, Nosaka K, Hiscock D, Latella C. Effects of High-Intensity Position-Specific Drills on Physical and Technical Skill Performance in Elite Youth Soccer Players. J Strength Cond Res 2022; 37:e332-e340. [PMID: 36730220 DOI: 10.1519/jsc.0000000000004360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
ABSTRACT Cuong Le, C, Ma'ayah, F, Nosaka, K, Hiscock, D, and Latella, C. Effects of high-intensity position-specific drills on physical and technical skill performance in elite youth soccer players. J Strength Cond Res XX(X): 000-000, 2022-Soccer physical preparation has been extensively researched with previous emphasis on high-intensity interval running and small-sided games. However, neither approach considers positional differences. The purpose of this study was to investigate the feasibility and short-term effects of a novel position-specific conditioning training (PSCT) paradigm on physical and technical abilities of young soccer players. Fifteen male Vietnamese professional youth soccer players (16.1 ± 0.4 years, 171.7 ± 4.8 cm, 63.9 ± 3.8 kg) undertook a 3-week control period followed by a 3-week intervention with PSCT drills performed twice per week. Position-specific conditioning training comprised purposely designed drills for attackers, defenders, and wingers, respectively. The intensity and duration were the same for all drills (4 × 4 minutes at ∼90% heart rate maximum [HRmax], separated by a 4-minute recovery at 70% HRmax) but differed in the technical and tactical actions performed. Outcome measures included Yo-Yo intermittent recovery test level 1, repeated sprint ability, 10-m and 30-m sprint time, and the Loughborough Soccer Passing Test for technical skills in a fatigued and nonfatigued state. Position-specific conditioning training drills induced a desirable intensity for effective conditioning purpose (89.0 ± 2.1% HRmax) with low interplayer variability (coefficient of variation = 2.4%). Yo-Yo intermittent recovery test level 1 performance improved (p < 0.05) after the control (Δ178.7 ± 203.3 m) and intervention (Δ176.0 ± 225.7 m) periods without a difference between. These results confirmed the feasibility of PSCT as a novel high-intensity training approach for soccer players. Improvements in aerobic capacity were noted, despite no effect on other physical and technical measures. PSCT may be suitable for individual training, return-to-play stages of rehabilitation, during off-season, or in academy settings when time is not a constraint.
Collapse
Affiliation(s)
- Cao Cuong Le
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia.,Viettel Sport Centre, Hanoi, Vietnam
| | - Fadi Ma'ayah
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Australia.,School of Education, Curtin University, Perth, Australia
| | - Kazunori Nosaka
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia.,School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Australia
| | - Daniel Hiscock
- Curtin School of Allied Health, Curtin University, Perth, Australia.,Sport Department, Wesley College, South Perth, Australia; and
| | - Christopher Latella
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia.,School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Australia.,Neurophysiology Research Laboratory, Edith Cowan University, Joondalup, Australia
| |
Collapse
|
35
|
The Dose–Response Relationship Between Training-Load Measures and Changes in Force–Time Components During a Countermovement Jump in Male Academy Soccer Players. Int J Sports Physiol Perform 2022; 17:1634-1641. [DOI: 10.1123/ijspp.2022-0107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 07/18/2022] [Accepted: 07/28/2022] [Indexed: 11/18/2022]
Abstract
Purpose: To manage physical performance in soccer, practitioners monitor the training load (TL) and the resulting fatigue. A method frequently used to assess performance is the countermovement jump (CMJ). However, the efficacy of CMJ to detect fatigue from soccer matches and training remains uncertain, as does the relationship between TL and change in CMJ performance. The aims of the present study were 2-fold. One was to observe the changes of CMJ force–time components and jump height (JH). The second was to examine dose–response relationships between TL measures and CMJ over a 6-week preseason. Methods: Twelve male academy soccer players (17 [1] y, 71.2 [5.6] kg, and 178 [5.8] cm) were recruited. Daily changes in CMJ were assessed against baseline scores established before preseason training, along with internal and external TL measures. A series of Bayesian random intercept models were fitted to determine probability of change above/below zero and greater than the coefficient of variation established at baseline. Jumps were categorized into match day minus (MD−) categories where the higher number indicated more time from a competitive match. Results: JH was lowest on MD − 3 (28 cm) and highest on MD − 4 (34.6 cm), with the probability of change from baseline coefficient of variation highly uncertain (41% and 61%, respectively). Changes to force–time components were more likely on MD − 3 (21%–99%), which provided less uncertainty than JH. Bayes R2 ranged from .22 to .57 between TL measures and all CMJ parameters. Conclusions: Force–time components were more likely to change than JH. Practitioners should also be cautious when manipulating TL measures to influence CMJ performance.
Collapse
|
36
|
Vella A, Clarke AC, Kempton T, Ryan S, Coutts AJ. Assessment of Physical, Technical, and Tactical Analysis in the Australian Football League: A Systematic Review. SPORTS MEDICINE - OPEN 2022; 8:124. [PMID: 36209264 PMCID: PMC9547771 DOI: 10.1186/s40798-022-00518-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 08/24/2022] [Indexed: 11/05/2022]
Abstract
Background Elite Australian Football (AF) match-play requires proficiency in physical, technical, and tactical elements. However, when analysing player movement practitioners commonly exclude technical and tactical considerations, failing to recognise the multifactorial nature of AF match-play and providing little context into the movement requirements of the players. Objectives This systematic review aimed to identify the physical, technical, and tactical requirements of the Australian Football League (AFL) and to highlight the importance of integrating data from multiple sources when analysing player output. Methods A systematic search of electronic databases (CINAHL, PubMed, Scopus, SPORTDiscus, and Web of Science) was conducted from January 2009 to June 2022. Keywords relating to physical, technical, and tactical match requirements were used. Results Forty-eight studies met the inclusion criteria. In isolation, physical requirements were the most analysed construct within the AFL (n = 17), followed by technical (n = 9) and then tactical (n = 6). Thirteen studies integrated physical and technical elements, one study integrated technical and tactical elements, one study integrated physical and tactical elements, and one study integrated all three elements. Movement analysis centred around average ‘whole’ match requirements, whereas technical and tactical match analyses focused on key performance indicators of match performance. Conclusion While the physical requirements of the AFL have been well documented, there is little understanding of how player technical output and various team tactics influence player movement requirements. Knowledge of how the elements of AF match-play interact with one another could enhance our understanding of match performance and provide a greater resource for training prescription.
Collapse
Affiliation(s)
- Andrew Vella
- grid.1018.80000 0001 2342 0938Sport and Exercise Science, La Trobe University, Bundoora, VIC Australia ,Carlton Football Club, Melbourne, VIC Australia
| | - Anthea C. Clarke
- grid.1018.80000 0001 2342 0938Sport and Exercise Science, La Trobe University, Bundoora, VIC Australia
| | - Thomas Kempton
- Carlton Football Club, Melbourne, VIC Australia ,grid.117476.20000 0004 1936 7611School of Sport, Exercise and Rehabilitation, Faculty of Health, Human Performance Research Centre, University of Technology Sydney (UTS), PO Box 123, Broadway, NSW 2007 Australia
| | - Samuel Ryan
- Carlton Football Club, Melbourne, VIC Australia ,grid.117476.20000 0004 1936 7611School of Sport, Exercise and Rehabilitation, Faculty of Health, Human Performance Research Centre, University of Technology Sydney (UTS), PO Box 123, Broadway, NSW 2007 Australia
| | - Aaron J. Coutts
- Carlton Football Club, Melbourne, VIC Australia ,grid.117476.20000 0004 1936 7611School of Sport, Exercise and Rehabilitation, Faculty of Health, Human Performance Research Centre, University of Technology Sydney (UTS), PO Box 123, Broadway, NSW 2007 Australia
| |
Collapse
|
37
|
Morgans R, Bezuglov E, Orme P, Burns K, Rhodes D, Babraj J, Di Michele R, Oliveira RFS. The Physical Demands of Match-Play in Academy and Senior Soccer Players from the Scottish Premiership. Sports (Basel) 2022; 10:sports10100150. [PMID: 36287763 PMCID: PMC9608936 DOI: 10.3390/sports10100150] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/20/2022] Open
Abstract
The present study aimed to assess the physical match performance among senior and youth soccer players from an elite Scottish Premiership club during the 2021/2022 season. Twenty-two first team (25.9 ± 4.5 years, 78.3 ± 8.2 kg, 1.82 ± 0.07 cm) and 16 youth players (16.8 ± 0.9 years, 70.1 ± 6.8 kg, 177 ± 5.8 cm) were examined. A selection of physical match performance variables were measured using a global positioning system. Linear mixed-effect regressions revealed for all examined variables no significant differences between first team and U-18 players and no significant differences between playing level by position interaction. Across both teams, Centre Backs compared to Wing Backs, showed a 295 m (p < 0.01) lower high-intensity distance, and performed on average 36 fewer very-high intensity decelerations (p = 0.03). Comparing to Wide Midfielders, Centre Backs showed lower total (1297 m, p = 0.01), high-intensity (350 m, p = 0.01), and sprint (167 m, p < 0.01) distances. Sprint distance was also lower in Centre Backs vs. Strikers (118 m, p = 0.03), and in Central Midfielders vs. both Strikers (104 m, p = 0.03) and Wide Midfielders (154 m, p = 0.01). The present findings highlight the physical match performance of elite Scottish players and provide useful information within the context of understanding how methods of physical development of youth soccer are implemented in different countries.
Collapse
Affiliation(s)
- Ryland Morgans
- Department of Sports Medicine and Medical Rehabilitation, Sechenov State Medical University Moscow, 119991 Moscow, Russia
- Correspondence:
| | - Eduard Bezuglov
- Department of Sports Medicine and Medical Rehabilitation, Sechenov State Medical University Moscow, 119991 Moscow, Russia
- High Performance Sports Laboratory, Moscow Witte University, 115432 Moscow, Russia
| | - Patrick Orme
- Sport Science and Medical Department, Bristol City FC, Bristol BS3 2EJ, UK
| | - Kyler Burns
- Sport Science and Medical Department, Dundee United FC, Dundee DD3 7JW, UK
| | - Dave Rhodes
- Football Performance Hub, School of Sport and Health Sciences, University of Central Lancashire, Preston PR1 2HE, UK
| | - John Babraj
- Division of Sport and Exercise Sciences, School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
| | - Rocco Di Michele
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy
| | - Rafael Franco Soares Oliveira
- Sports Science School of Rio Maior-Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal
- Life Quality Research Centre, 2040-413 Rio Maior, Portugal
- Research Centre in Sport Sciences, Health Sciences and Human Development, 5001-801 Vila Real, Portugal
| |
Collapse
|
38
|
Zanin M, Azzalini A, Ranaweera J, Till K, Darrall-Jones J, Roe G. Designing a small-sided game to elicit attacking tactical behaviour in professional rugby union forwards. J Sports Sci 2022; 40:2304-2314. [PMID: 36508221 DOI: 10.1080/02640414.2022.2156101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study aimed to investigate the consistency of attacking tactical and technical behaviour, and physical characteristics, over multiple bouts, and variability across days, of a specific rugby union forwards small-sided game (SSG). Data was collected from 21 professional rugby union forwards during four training sessions. The SSG, consisting of five bouts of work (150-s) interspersed by passive recovery (75-s), aimed to elicit specific attacking tactical behaviour. Tactical behaviour (i.e., regularity of attacking shape [entropy]), and technical (e.g., passes) and physical (e.g., total distance) characteristics were quantified. Results showed that technical characteristics remained consistent, whereas the regularity of width of the attacking shape and two physical characteristics (i.e., total distance, training impulse) varied across bouts. However, these effects had limited practical significance. Technical characteristics were consistent across days, but minimal variability was observed for tactical behaviour and physical characteristics, as shown by their small random effects with 95% profile likelihood confidence intervals (PLCI) including zero (e.g., SD[95%PLCI] = 0.03[0.00, 0.06]). Consequently, consistency of stimulus over bouts and days is achievable for the majority of the variables investigated, thus supporting the use of SSG to elicit consistent attacking behaviour, but also technical and physical characteristics in rugby union forwards.
Collapse
Affiliation(s)
- Marco Zanin
- Carnegie Applied Rugby Research Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Performance department, Bath Rugby Football Club, Bath, UK
| | - Adelchi Azzalini
- Dipartimento di Scienze Statistiche, Università degli Studi di Padova, Padua, Italy
| | - Jayamini Ranaweera
- Carnegie Applied Rugby Research Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Performance department, Bath Rugby Football Club, Bath, UK
| | - Kevin Till
- Carnegie Applied Rugby Research Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Leeds Rhinos Rugby League Club, Leeds, UK
| | - Joshua Darrall-Jones
- Carnegie Applied Rugby Research Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK
| | - Gregory Roe
- Carnegie Applied Rugby Research Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.,Performance department, Bath Rugby Football Club, Bath, UK
| |
Collapse
|
39
|
The field and resistance training loads of academy rugby league players during a pre-season: Comparisons across playing positions. PLoS One 2022; 17:e0272817. [PMID: 35944037 PMCID: PMC9362933 DOI: 10.1371/journal.pone.0272817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/26/2022] [Indexed: 11/19/2022] Open
Abstract
Male academy rugby league players are required to undertake field and resistance training to develop the technical, tactical and physical qualities important for success in the sport. However, limited research is available exploring the training load of academy rugby league players. Therefore, the purpose of this study was to quantify the field and resistance training loads of academy rugby league players during a pre-season period and compare training loads between playing positions (i.e., forwards vs. backs). Field and resistance training load data from 28 adolescent male (age 17 ± 1 years) rugby league players were retrospectively analysed following a 13-week pre-season training period (85 total training observations; 45 field sessions and 40 resistance training sessions). Global positioning system microtechnology, and estimated repetition volume was used to quantify external training load, and session rating of perceived exertion (sRPE) was used to quantify internal training load. Positional differences (forwards n = 13 and backs n = 15) in training load were established using a linear mixed effect model. Mean weekly training frequency was 7 ± 2 with duration totaling 324 ± 137 minutes, and a mean sRPE of 1562 ± 678 arbitrary units (AU). Backs covered more high-speed distance than forwards in weeks two (p = 0.024), and 11 (p = 0.028). Compared to the forwards, backs completed more lower body resistance training volume in week one (p = 0.02), more upper body volume in week three (p< 0.001) and week 12 (p = 0.005). The findings provide novel data on the field and resistance-based training load undertaken by academy rugby league players across a pre-season period, highlighting relative uniformity between playing positions. Quantifying training load can support objective decision making for the prescription and manipulation of future training, ultimately aiming to maximise training within development pathways.
Collapse
|
40
|
Concurrent Validity and Reliability of Sprinting Force-Velocity Profile Assessed With GPS Devices in Elite Athletes. Int J Sports Physiol Perform 2022; 17:1527-1531. [PMID: 35894960 DOI: 10.1123/ijspp.2021-0339] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 05/06/2022] [Accepted: 05/17/2022] [Indexed: 11/18/2022]
Abstract
PURPOSE The aims of this study were to (1) assess the concurrent validity of global positioning systems (GPSs) against a radar device to measure sprinting force-velocity (F-v) profiles and (2) evaluate the interunit reliability of 10-Hz GPS devices (Vector S7, Catapult Innovations). METHODS Sixteen male elite U18 rugby union players (178.3 [7.6] cm; 78.3 [13.2] kg) participated. Two 50-m sprints interspersed with at least 5 minutes of recovery were completed to obtain input (maximal sprint speed and acceleration time constant τ) and output (theoretical maximal horizontal force, sprinting speed, and horizontal power) F-v profile variables. Sprint running speed was concurrently measured with a radar and 2 GPS units placed on the upper back of each player. Concurrent validity and interunit reliability analyses were performed. RESULTS Moderate to nearly perfect correlations were observed between radar and GPS-derived F-v variables, with small to large typical errors. Trivial to small coefficients of variation were found regarding the GPS interunit reliability. CONCLUSION The GPS devices tested in this study represent a valid and reliable alternative to a radar device when assessing sprint acceleration F-v profiles in team-sport players.
Collapse
|
41
|
Verdel N, Drobnič M, Maslik J, Björnander Rahimi K, Tantillo G, Gumiero A, Hjort K, Holmberg HC, Supej M. A Comparison of a Novel Stretchable Smart Patch for Measuring Runner’s Step Rates with Existing Measuring Technologies. SENSORS 2022; 22:s22134897. [PMID: 35808391 PMCID: PMC9269156 DOI: 10.3390/s22134897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/26/2022] [Accepted: 06/27/2022] [Indexed: 12/10/2022]
Abstract
A novel wearable smart patch can monitor various aspects of physical activity, including the dynamics of running, but like any new device developed for such applications, it must first be tested for validity. Here, we compare the step rate while running in place as measured by this smart patch to the corresponding values obtained utilizing ‘‘gold standard’’ MEMS accelerometers in combination with bilateral force plates equipped with HBM load cells, as well as the values provided by a three-dimensional motion capture system and the Garmin Dynamics Running Pod. The 15 healthy, physically active volunteers (age = 23 ± 3 years; body mass = 74 ± 17 kg, height = 176 ± 10 cm) completed three consecutive 20-s bouts of running in place, starting at low, followed by medium, and finally at high intensity, all self-chosen. Our major findings are that the rates of running in place provided by all four systems were valid, with the notable exception of the fast step rate as measured by the Garmin Running Pod. The lowest mean bias and LoA for these measurements at all rates were associated consistently with the smart patch.
Collapse
Affiliation(s)
- Nina Verdel
- Department of Health Sciences, Mid Sweden University, 83125 Östersund, Sweden;
- Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Miha Drobnič
- Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Jan Maslik
- Department of Materials Science and Engineering, Uppsala University, 75121 Uppsala, Sweden; (J.M.); (K.B.R.); (K.H.)
| | - Klara Björnander Rahimi
- Department of Materials Science and Engineering, Uppsala University, 75121 Uppsala, Sweden; (J.M.); (K.B.R.); (K.H.)
| | | | | | - Klas Hjort
- Department of Materials Science and Engineering, Uppsala University, 75121 Uppsala, Sweden; (J.M.); (K.B.R.); (K.H.)
| | - Hans-Christer Holmberg
- Department of Health Sciences, Luleå University of Technology, 97187 Lulea, Sweden;
- Department of Physiology and Pharmacology, Karolinska Institutet, 17177 Stockholm, Sweden
| | - Matej Supej
- Department of Health Sciences, Mid Sweden University, 83125 Östersund, Sweden;
- Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia;
- Correspondence:
| |
Collapse
|
42
|
Deely C, Tallent J, Bennett R, Woodhead A, Goodall S, Thomas K, Howatson G. Etiology and Recovery of Neuromuscular Function Following Academy Soccer Training. Front Physiol 2022; 13:911009. [PMID: 35770192 PMCID: PMC9235147 DOI: 10.3389/fphys.2022.911009] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 05/24/2022] [Indexed: 12/01/2022] Open
Abstract
Aim: To profile the etiology and recovery time-course of neuromuscular function in response to a mixed-content, standard training week in professional academy soccer players. We concurrently examined physical performance, cognitive function, and perceptual measures of mood and wellness states to identify a range of simple tests applied practitioners could use in the field as surrogate measures of neuromuscular function. Methods: Sixteen professional academy soccer players completed a range of neuromuscular, physical, perceptual, mood, and cognitive function tests at baseline and after a strenuous training day (pitch and gym), with retest at 24, 48, and 72 h, and further pitch and gym sessions after 48 h post-baseline. Maximal voluntary contraction force (MVC) and twitch responses to electrical stimulation (femoral nerve) during isometric knee-extensor contractions and at rest were measured to assess central nervous system (voluntary activation, VA) and muscle contractile (potentiated twitch force, Qtw,pot) function. Results: Strenuous training elicited decrements in MVC force post-session (−11%, p = 0.001) that remained unresolved at 72 h (−6%, p = 0.03). Voluntary activation (motor nerve stimulation) was reduced immediately post-training only (−4%, p = 0.03). No change in muscle contractile function (Qtw,pot) was observed post-training, though was reduced at 24 h (−13%, p = 0.01), and had not fully recovered 72 h after (−9%, p = 0.03). Perceptions of wellness were impaired post-training, and recovered by 24 h (sleepiness, energy) and 48 h (fatigue, muscle soreness, readiness to train). Countermovement jump performance declined at 24 h, while RSI (Reactive Strength Index) decrements persisted at 48 h. No changes were evident in adductor squeeze, mood, or cognitive function. Conclusion: Elite youth soccer training elicits substantial decrements in neuromuscular function, which are still present 72 h post-strenuous exercise. Though central processes contribute to post-exercise neuromuscular alterations, the magnitude and prolonged presence of impairments in contractile function indicates it is the restitution of muscular function (peripheral mechanisms) that explains recovery from strenuous training in academy soccer players.
Collapse
Affiliation(s)
- Ciaran Deely
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom
- Queen Park Rangers Football Club, Crane Lodge Road, London, United Kingdom
| | - Jamie Tallent
- School of Sport, Rehabilitation, and Exercise Sciences, University of Essex, Colchester, United Kingdom
- Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, VIC, Australia
| | - Ross Bennett
- Queen Park Rangers Football Club, Crane Lodge Road, London, United Kingdom
| | - Alex Woodhead
- Centre for Applied Performance Sciences, Faculty of Sport, Allied Health and Performance Sciences, St. Mary’s University, Twickenham, United Kingdom
| | - Stuart Goodall
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Kevin Thomas
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Glyn Howatson
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom
- Water Research Group, Faculty of Natural and Agricultural Sciences, North West University, Potchefstroom, South Africa
- *Correspondence: Glyn Howatson,
| |
Collapse
|
43
|
Hills SP, Barrett S, Thoseby B, Kilduff LP, Barwood MJ, Radcliffe JN, Cooke CB, Russell M. Quantifying the Peak Physical Match-Play Demands of Professional Soccer Substitutes Following Pitch-Entry: Assessing Contextual Influences. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2022; 93:270-281. [PMID: 33030984 DOI: 10.1080/02701367.2020.1823308] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
Purpose: To quantify the peak post-pitch-entry physical responses of soccer substitutes while assessing contextual influences. Peak responses may be important performance indicators for substitutes introduced to provide a physical impact. Method: Thirty-three professional substitutes wore Microelectromechanical Systems during 44 matches (4 ± 3 observations·player-1). Post-pitch-entry relative peak values for total and high-speed (> 5.5 m·s-1) distances, average acceleration, and PlayerLoad™ were calculated using rolling averages over 60-s to 600-s. Linear mixed models assessed contextual influences (position, substitution timing, scoreline, and location). Results: Substitutes introduced during the final ~15 min of match-play covered less high-speed distance than first-half substitutes (~2.8-3.1 m·min-1) over 480-s to 600-s epochs, and less than 60:00-74:59 min substitutes (~1.7-1.8 m·min-1) during 540-s and 600-s epochs. Average acceleration during all except 180-s epochs was lower for 75:00+ min substitutes compared with first-half replacements (~0.27-0.43 m·s-2), and lower than 60:00-74:59 min substitutes during 60-s (~0.13 m·s-2). Substitutes introduced when their team was winning recorded greater distances over 120-s to 600-s (~6.2-7.7 m·min-1), and higher PlayerLoad™ values during 120-s, 180-s, 300-s, and 480-s epochs (~2.7-3.6 arbitrary units·min-1), compared with when scores were level at pitch-entry. Irrespective of substitution timing, substitute midfielders exceeded the total distance of substitute attackers (~5.9-16.2 m·min-1) for all except 360-s and 600-s epochs, and defenders (~13.3-26.7 m·min-1) during epochs < 300-s. Conclusions: This study provides benchmark data for practitioners tailoring training and recovery protocols, particularly "top-up" conditioning, to the competitive demands of soccer substitutes. Knowing how contextual factors influence substitutes' peak match-play responses may help managers/coaches assess the efficacy of substitution strategies.
Collapse
|
44
|
Donaldson T, Scantlebury M, Furness J, Kemp-Smith K, Newcomer S, Climstein M. Training Methods in the Sport of Surfing: A Scoping Review. Strength Cond J 2022. [DOI: 10.1519/ssc.0000000000000674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
45
|
Harper DJ, McBurnie AJ, Santos TD, Eriksrud O, Evans M, Cohen DD, Rhodes D, Carling C, Kiely J. Biomechanical and Neuromuscular Performance Requirements of Horizontal Deceleration: A Review with Implications for Random Intermittent Multi-Directional Sports. Sports Med 2022; 52:2321-2354. [PMID: 35643876 PMCID: PMC9474351 DOI: 10.1007/s40279-022-01693-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/17/2022] [Indexed: 11/28/2022]
Abstract
Rapid horizontal accelerations and decelerations are crucial events enabling the changes of velocity and direction integral to sports involving random intermittent multi-directional movements. However, relative to horizontal acceleration, there have been considerably fewer scientific investigations into the biomechanical and neuromuscular demands of horizontal deceleration and the qualities underpinning horizontal deceleration performance. Accordingly, the aims of this review article are to: (1) conduct an evidence-based review of the biomechanical demands of horizontal deceleration and (2) identify biomechanical and neuromuscular performance determinants of horizontal deceleration, with the aim of outlining relevant performance implications for random intermittent multi-directional sports. We highlight that horizontal decelerations have a unique ground reaction force profile, characterised by high-impact peak forces and loading rates. The highest magnitude of these forces occurs during the early stance phase (< 50 ms) and is shown to be up to 2.7 times greater than those seen during the first steps of a maximal horizontal acceleration. As such, inability for either limb to tolerate these forces may result in a diminished ability to brake, subsequently reducing deceleration capacity, and increasing vulnerability to excessive forces that could heighten injury risk and severity of muscle damage. Two factors are highlighted as especially important for enhancing horizontal deceleration ability: (1) braking force control and (2) braking force attenuation. Whilst various eccentric strength qualities have been reported to be important for achieving these purposes, the potential importance of concentric, isometric and reactive strength, in addition to an enhanced technical ability to apply braking force is also highlighted. Last, the review provides recommended research directions to enhance future understanding of horizontal deceleration ability.
Collapse
Affiliation(s)
- Damian J. Harper
- Institute of Coaching and Performance, School of Sport and Health Sciences, University of Central Lancashire, Fylde Road, Preston, PR1 2HE UK
| | - Alistair J. McBurnie
- Department of Football Medicine and Science, Manchester United Football Club, AON Training Complex, Manchester, UK
| | - Thomas Dos’ Santos
- Department of Sport and Exercise Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Manchester, UK
| | - Ola Eriksrud
- Biomechanics Laboratory, Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway
| | - Martin Evans
- The FA Group, St George’s Park, Burton-Upon-Trent, Staffordshire, UK
| | - Daniel D. Cohen
- Faculty of Health Sciences, Masira Research Institute, University of Santander, Bucaramanga, Colombia
- Sports Science Centre (CCD), Colombian Ministry of Sport (Mindeporte), Bogotá, Distrito Capital Colombia
| | - David Rhodes
- Institute of Coaching and Performance, School of Sport and Health Sciences, University of Central Lancashire, Fylde Road, Preston, PR1 2HE UK
| | - Christopher Carling
- Present Address: FFF Research Centre, French Football Federation, Clairefontaine National Football Centre, Clairefontaine-en-Yvelines, France
- Laboratory Sport, Expertise and Performance (EA 7370), French Institute of Sport (INSEP), Paris, France
| | - John Kiely
- Physical Education and Sports Science Department, University of Limerick, Limerick, Ireland
| |
Collapse
|
46
|
Calderón-Pellegrino G, Gallardo L, Garcia-Unanue J, Felipe JL, Hernandez-Martin A, Paredes-Hernández V, Sánchez-Sánchez J. Physical Demands during the Game and Compensatory Training Session (MD + 1) in Elite Football Players Using Global Positioning System Device. SENSORS (BASEL, SWITZERLAND) 2022; 22:3872. [PMID: 35632281 PMCID: PMC9145854 DOI: 10.3390/s22103872] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/10/2022] [Accepted: 05/17/2022] [Indexed: 11/26/2022]
Abstract
The aims of this study were to analyze the differences of physical demands of non-starter players regarding the playing time during the competition and to evaluate the physical demands of the compensatory training (MD + 1C) for substitute players in elite football. The match statistics and MD + 1C of substitute players from a professional Spanish LaLiga football club were analyzed using a 10-Hz global positioning system (GPS) Apex GPS system device, which has been validated as a reliable and valid method to analyze performance in team sports, during all games of the 2016/2017, 2017/2018 and 2018/2019 seasons. The starting players showed both lower total distances covered and high-intensity actions compared to the substitutes. Regarding the minutes played by the substitutes, greater physical performance was found for the players with fewer minutes (5−15 min). Furthermore, no differences were found between first and second divisions regarding physical performance of substitutes (p > 0.05). This study highlights the importance of individualizing the workload of training sessions for substitutes and starters. Furthermore, the complementary session should be individualized according to the minutes played by the substitutes. These players are potentially under-loaded compared to starters, especially in terms of high-intensity actions, therefore additional session-specific training for each substitute would be useful to reach the optimal training load according to the minutes played during the game.
Collapse
Affiliation(s)
| | - Leonor Gallardo
- IGOID Research Group, University of Castilla-La Mancha, 45071 Toledo, Spain; (L.G.); (J.G.-U.); (A.H.-M.)
| | - Jorge Garcia-Unanue
- IGOID Research Group, University of Castilla-La Mancha, 45071 Toledo, Spain; (L.G.); (J.G.-U.); (A.H.-M.)
| | - Jose Luis Felipe
- Faculty of Sport Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain; (J.L.F.); (J.S.-S.)
| | - Antonio Hernandez-Martin
- IGOID Research Group, University of Castilla-La Mancha, 45071 Toledo, Spain; (L.G.); (J.G.-U.); (A.H.-M.)
| | | | - Javier Sánchez-Sánchez
- Faculty of Sport Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain; (J.L.F.); (J.S.-S.)
| |
Collapse
|
47
|
Russomanno TG, Blauberger P, Kolbinger O, Lam H, Schmid M, Lames M. Drone-Based Position Detection in Sports-Validation and Applications. Front Physiol 2022; 13:850512. [PMID: 35492583 PMCID: PMC9040709 DOI: 10.3389/fphys.2022.850512] [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: 01/07/2022] [Accepted: 03/01/2022] [Indexed: 12/02/2022] Open
Abstract
Radio and video-based electronic performance and tracking systems (EPTS) for position detection are widely used in a variety of sports. In this paper, the authors introduce an innovative approach to video-based tracking that uses a single camera attached to a drone to capture an area of interest from a bird’s eye view. This pilot validation study showcases several applications of this novel approach for the analysis of game and racket sports. To this end, the authors compared positional data retrieved from video footage recorded using a drone with positional data obtained from established radio-based systems in three different setups: a tennis match during training with the drone hovering at a height of 27 m, a small-sided soccer game with the drone at a height of 50 m, and an Ultimate Frisbee match with the drone at a height of 85 m. For each type of playing surface, clay (tennis) and grass (soccer and Ultimate), the drone-based system demonstrated acceptable static accuracy with root mean square errors of 0.02 m (clay) and 0.15 m (grass). The total distance measured using the drone-based system showed an absolute difference of 2.78% in Ultimate and 2.36% in soccer, when compared to an established GPS system and an absolute difference of 2.68% in tennis, when compared to a state-of-the-art LPS. The overall ICC value for consistency was 0.998. Further applications of a drone-based EPTS and the collected positional data in the context of performance analysis are discussed. Based on the findings of this pilot validation study, we conclude that drone-based position detection could serve as a promising alternative to existing EPTS but would benefit from further comparisons in dynamic settings and across different sports.
Collapse
Affiliation(s)
- Tiago Guedes Russomanno
- Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany.,Laboratory for Teaching Computer Science Applied to Physical Education and Sport, Faculty of Physical Education, University of Brasilia, Brasilia, Brazil
| | - Patrick Blauberger
- Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Otto Kolbinger
- Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Hilary Lam
- Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Marc Schmid
- Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Martin Lames
- Chair of Performance Analysis and Sports Informatics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| |
Collapse
|
48
|
Johnston RD, Thornton HR, Wade JA, Devlin P, Duthie GM. The Distribution of Match Activities Relative to the Maximal Mean Intensities in Professional Rugby League and Australian Football. J Strength Cond Res 2022; 36:1360-1366. [PMID: 32412969 DOI: 10.1519/jsc.0000000000003613] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Johnston, RD, Thornton, HR, Wade, JA, Devlin, P, and Duthie, GM. The distribution of match activities relative to the maximal mean intensities in professional rugby league and Australian football. J Strength Cond Res 36(5): 1360-1366, 2022-This study determined the distribution of distance, impulse, and accelerometer load accumulated at intensities relative to the maximal mean 1-minute peak intensity within professional rugby league and Australian football. Within 26 rugby league (n = 24 athletes) and 18 Australian football (n = 38 athletes) games, athletes wore global navigation satellite system devices (n = 608 match files). One-minute maximal mean values were calculated for each athlete per game for speed (m·minP-1P), accelerometer load (AU·minP-1P), and acceleration (m·sP-2P). Volumes for each parameter were calculated by multiplying by time, specifying total distance, accelerometer load, and impulse. The distribution of intensity of which these variables were performed relative to the maximal mean was calculated, with percentages ranging from 0-110%, separated into 10% thresholds. Linear mixed models determined whether the distribution of activities within each threshold varied, and positional differences. Effects were described using standardized effect sizes (ESs), and magnitude-based decisions. Across both sports, the distribution of activity (%) largely reduced the closer to the maximal mean 1-minute peak and was highest at ∼60% of the maximal mean peak. When compared with Australian football, a higher percentage of total distance was accumulated at higher intensities (70-80% and 100-110%) for rugby league (ES range = 0.82-0.87), with similar, yet larger differences for accelerometer load >80% (0.78-1.07) and impulse >60% (1.00-2.26). These findings provide information of the volume of activities performed relative to the mean maximal 1-minute peak period, which may assist in the prescription of training.
Collapse
Affiliation(s)
- Rich D Johnston
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, Queensland, Australia
- Institute for Sport Physical Activity and Leisure, Leeds Beckett University, Leeds, United Kingdom
| | - Heidi R Thornton
- Football Department, Gold Coast Suns Football Club, Metricon Stadium, Carrara, Queensland, Australia
| | - Jarrod A Wade
- Football Department, South Sydney Rabbitohs, Sydney, Australia
| | - Paul Devlin
- Football Department, Brisbane Broncos, Brisbane, Australia ; and
| | - Grant M Duthie
- School of Exercise Science, Australian Catholic University, Strathfield, New South Wales, Australia
| |
Collapse
|
49
|
Ellens S, Middleton K, Gastin PB, Varley MC. Techniques to derive and clean acceleration and deceleration data of athlete tracking technologies in team sports: A scoping review. J Sports Sci 2022; 40:1772-1800. [PMID: 35446231 DOI: 10.1080/02640414.2022.2054535] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The application of acceleration and deceleration data as a measure of an athlete's physical performance is common practice in team sports. Acceleration and deceleration are monitored with athlete tracking technologies during training and games to quantify training load, prevent injury and enhance performance. However, inconsistencies exist throughout the literature in the reported methodological procedures used to quantify acceleration and deceleration. The object of this review was to systematically map and provide a summary of the methodological procedures being used on acceleration and deceleration data obtained from athlete tracking technologies in team sports and describe the applications of the data. Systematic searches of multiple databases were undertaken. To be included, studies must have investigated full body acceleration and/or deceleration data of athlete tracking technologies. The search identified 276 eligible studies. Most studies (60%) did not provide information on how the data was derived and what sequence of steps were taken to clean the data. Acceleration and deceleration data were commonly applied to quantify and describe movement demands using effort metrics. This scoping review identified research gaps in the methodological procedures and deriving and cleaning techniques that warrant future research focussing on their effect on acceleration and deceleration data.
Collapse
Affiliation(s)
- Susanne Ellens
- Sport and Exercise Science, School of Allied Health, Human Services & Sport, La Trobe University, Melbourne, VIC, Australia.,La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, VIC, Australia
| | - Kane Middleton
- Sport and Exercise Science, School of Allied Health, Human Services & Sport, La Trobe University, Melbourne, VIC, Australia.,La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, VIC, Australia
| | - Paul B Gastin
- Sport and Exercise Science, School of Allied Health, Human Services & Sport, La Trobe University, Melbourne, VIC, Australia.,La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, VIC, Australia
| | - Matthew C Varley
- Sport and Exercise Science, School of Allied Health, Human Services & Sport, La Trobe University, Melbourne, VIC, Australia.,La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, VIC, Australia
| |
Collapse
|
50
|
Delves RI, Duthie GM, Ball KA, Aughey RJ. Applying common filtering processes to Global Navigation Satellite System-derived acceleration during team sport locomotion. J Sports Sci 2022; 40:1116-1126. [DOI: 10.1080/02640414.2022.2051332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Robert I.M. Delves
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| | - Grant M. Duthie
- School of Behavioural and Health Sciences, Australian Catholic University, Strathfield, NSW, Australia
| | - Kevin A. Ball
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| | - Robert J. Aughey
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| |
Collapse
|