scholarly journals Individualization of Intensity Thresholds on External Workload Demands in Women’s Basketball by K-Means Clustering: Differences Based on the Competitive Level

Sensors ◽  
2022 ◽  
Vol 22 (1) ◽  
pp. 324
Author(s):  
Sergio J. Ibáñez ◽  
Carlos D. Gómez-Carmona ◽  
David Mancha-Triguero
Keyword(s):  
Injury Risk ◽  
Team Sports ◽  
Ultra Wideband ◽  
Sports Performance ◽  
Basketball Players ◽  
Professional Basketball ◽  
Women's Basketball ◽  
Indoor Tracking ◽  
Tracking Technology ◽  
Basketball Teams

In previous studies found in the literature speed (SP), acceleration (ACC), deceleration (DEC), and impact (IMP) zones have been created according to arbitrary thresholds without considering the specific workload profile of the players (e.g., sex, competitive level, sport discipline). The use of statistical methods based on raw data could be considered as an alternative to be able to individualize these thresholds. The study purposes were to: (a) individualize SP, ACC, DEC, and IMP zones in two female professional basketball teams; (b) characterize the external workload profile of 5 vs. 5 during training sessions; and (c) compare the external workload according to the competitive level (first vs. second division). Two basketball teams were recorded during a 15-day preseason microcycle using inertial devices with ultra-wideband indoor tracking technology and microsensors. The zones of external workload variables (speed, acceleration, deceleration, impacts) were categorized through k-means clusters. Competitive level differences were analyzed with Mann–Whitney’s U test and with Cohen’s d effect size. Five zones were categorized in speed (<2.31, 2.31–5.33, 5.34–9.32, 9.33–13.12, 13.13–17.08 km/h), acceleration (<0.50, 0.50–1.60, 1.61–2.87, 2.88–4.25, 4.26–6.71 m/s2), deceleration (<0.37, 0.37–1.13, 1.14–2.07, 2.08–3.23, 3.24–4.77 m/s2), and impacts (<1, 1–2.99, 3–4.99, 5–6.99, 7–10 g). The women’s basketball players covered 60–51 m/min, performed 27–25 ACC-DEC/min, and experienced 134–120 IMP/min. Differences were found between the first and second division teams, with higher values in SP, ACC, DEC, and IMP in the first division team (p < 0.03; d = 0.21–0.56). In conclusion, k-means clustering can be considered as an optimal tool to categorize intensity zones in team sports. The individualization of external workload demands according to the competitive level is fundamental for designing training plans that optimize sports performance and reduce injury risk in sport.

Monitoring Workload in Elite Female Basketball Players During the In-Season Phase: Weekly Fluctuations and Effect of Playing Time

2019 ◽  
Vol 14 (7) ◽  
pp. 941-948 ◽  
Author(s):  
Henrikas Paulauskas ◽  
Rasa Kreivyte ◽  
Aaron T. Scanlan ◽  
Alexandre Moreira ◽  
Laimonas Siupsinskas ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Linear Models ◽  
Training Session ◽  
Rating Of Perceived Exertion ◽  
Basketball Players ◽  
Significant Difference ◽  
Women's Basketball ◽  
Playing Time ◽  
And Training ◽  
Basketball Teams

Purpose:To assess the weekly fluctuations in workload and differences in workload according to playing time in elite female basketball players.Methods:A total of 29 female basketball players (mean [SD] age 21 [5] y, stature 181 [7] cm, body mass 71 [7] kg, playing experience 12 [5] y) belonging to the 7 women’s basketball teams competing in the first-division Lithuanian Women’s Basketball League were recruited. Individualized training loads (TLs) and game loads (GLs) were assessed using the session rating of perceived exertion after each training session and game during the entire in-season phase (24 wk). Percentage changes in total weekly TL (weekly TL + GL), weekly TL, weekly GL, chronic workload, acute:chronic workload ratio, training monotony, and training strain were calculated. Mixed linear models were used to assess differences for each dependent variable, with playing time (low vs high) used as fixed factor and subject, week, and team as random factors.Results:The highest changes in total weekly TL, weekly TL, and acute:chronic workload ratio were evident in week 13 (47%, 120%, and 49%, respectively). Chronic workload showed weekly changes ≤10%, whereas monotony and training strain registered highest fluctuations in weeks 17 (34%) and 15 (59%), respectively. A statistically significant difference in GL was evident between players completing low and high playing times (P = .026, moderate), whereas no significant differences (P > .05) were found for all other dependent variables.Conclusions:Coaches of elite women’s basketball teams should monitor weekly changes in workload during the in-season phase to identify weeks that may predispose players to unwanted spikes and adjust player workload according to playing time.

Accuracy, inter-unit reliability and comparison between GPS and UWB-based tracking systems for measuring centripetal force during curvilinear locomotion

2020 ◽  
pp. 175433712096160
Author(s):  
Paulino Granero-Gil ◽  
Alejandro Bastida-Castillo ◽  
Daniel Rojas-Valverde ◽  
Carlos D Gómez-Carmona ◽  
Ernesto de la Cruz Sánchez ◽  
...  
Keyword(s):  
Team Sports ◽  
Ultra Wideband ◽  
Centripetal Force ◽  
Sports Performance ◽  
Tracking Systems ◽  
Force Measurements ◽  
Global Positioning ◽  
Ethical Approval ◽  
Elite Level ◽  
Centripetal Forces

Curvilinear locomotion is important for team sports performance and requires data collection and monitoring of centripetal forces. Currently, the centripetal force can be measured by different sensors that compose inertial devices, but its accuracy needs to be assessed. Therefore, this research aimed to analyze the accuracy and inter-unit reliability of both global positioning (GPS)-based and ultra-wideband (UWB)-based systems for practical application in the field. Following institutional ethical approval and familiarization, 10 elite-level male soccer players performed six circuits on four tracks (6-m radius circle, 9.15-m radius circle, 12-m radius circle, and combined track locomotion) in both directions (three counter-clockwise and three clockwise) and were monitored by two tracking systems (GPS and UWB). The direct measurement was compared with the theoretical centripetal force calculated by photocells and spatial references. The UWB technology showed better accuracy (clockwise, bias =−1.34 N; counter-clockwise, bias = 1.09 N) than the GPS (clockwise, bias = −2.19 N; counter-clockwise, bias = 1.75 N) in centripetal force measurements. However, both tracking technologies obtained very large to nearly perfect reliability results (GPS: ICC = 0.76-0.96; UWB: ICC = 0.76–0.98). In conclusion, even though both technologies proved to be reliable and data could be compared between units, the UWB-based system demonstrated better accuracy than the GPS-based system to detect centripetal force during curvilinear locomotion.

scholarly journals INNOVATIVE APPROACHES TO REDUCING CONFLICT AND AGGRESSION IN WOMEN'S BASKETBALL TEAM PLAY

2020 ◽  
Vol 19 (4) ◽  
pp. 92-102
Author(s):  
L Rychkova ◽  
O Koneva ◽  
S Morozova ◽  
N Vinogradova ◽  
A Aminova
Keyword(s):  
Interpersonal Relationships ◽  
Interpersonal Relations ◽  
Interpersonal Behavior ◽  
Control Group ◽  
Basketball Players ◽  
Conflict Situations ◽  
Women's Basketball ◽  
Emotional Aggression ◽  
Innovative Approaches ◽  
Basketball Teams

Aim. The purpose of the article is to introduce innovative approaches to training female basketball players for responding and resolving conflict situations, reducing aggressiveness, building effective interpersonal relationships during training to achieve high results. Materials and methods. The study involved two groups of female basketball players. The experimental group (EG) consisted of 32 subjects aged 18–25 years old, members of the women's basketball teams of universities in Chelyabinsk. The control group (CG) consisted of 28 subjects of a similar age, who were part of the amateur university women's basketball teams. The study used the “Aggression Test” by L.G. Pochebut, the K. Thomas Conflict Mode Instrument (adaptation by N.V. Grishina), and the T. Leary Interpersonal Behavior Circle Personal Inventory. Statistical analysis of the results was carried out using the SPSS Statistics 17.0 program. Results. High level of aggressiveness, conflict and inadequacy of interpersonal relations in basketball players was revealed. The author’s innovative modular psychological and pedagogical program for the correction of destructive types of aggression, as well as conflict and ineffective interpersonal relationships was developed and implemented. Monitoring showed a decrease in the level of physical, emotional aggression, self-aggression. The choice of adequate strategies for behavior in the conflict was formed, which indicates the effectiveness of the program when working with athletes of basketball teams during training. Conclusion. An analysis of the data obtained indicates that after the modular psychological and pedagogical program the athletes learned to neutralize conflict and at the same time switch their aggression to neutral objects, express aggression verbally with less emotional coloring, resolve conflict situations and construct harmoniously interpersonal relationships.

scholarly journals Impact of hip abductor and adductor strength on dynamic balance and ankle biomechanics in young elite female basketball players.

2021 ◽  
Author(s):  
Domínguez-Navarro Fernando ◽  
Josep Carles Benitez-Martínez ◽  
Borja Luna-Ricart ◽  
Pedro Cotolí-Suárez ◽  
Jose María Blasco-Igual ◽  
...  
Keyword(s):  
Injury Risk ◽  
Dynamic Balance ◽  
Correlation Study ◽  
Moderate Correlation ◽  
Basketball Players ◽  
Limb Injury ◽  
Women's Basketball ◽  
High Prevalence ◽  
Hip Abductor ◽  
Ankle Mobility

Abstract Muscles weakness can affect to injury risk, in lower limb hip abductor (ABD) and adductor (AD) muscles have not been elucidated how affect in female basketball players, such as balance and ankle mobility. This study aimed to investigate hip ABD and AD strength and their relation in balance and ankle dorsiflexion mobility in young elite female basketball players. Observational study in a total of 60 trainee-level elite female basketball players (13–17 years old) were included. Hip ABD and AD isometric strength values were collected. The correlation study showed that hip ABD strength had a low-moderate correlation with balance and ankle mobility in the homolateral and contralateral leg, while there was a low-moderate correlation between hip AD strength and balance and ankle mobility only in the homolateral leg. On the other hand, the ABD-AD ratio was not found to correlate with balance or mobility scores, nor the degree of muscle imbalance between legs. Hip ABD and AD strength affects balance and ankle mobility in trainee level female basketball players. These findings should thus be taken into consideration when designing strategies aimed at reducing the risk of limb injury, which has a high prevalence in women's basketball.

scholarly journals Propuesta de modelo predictivo de riesgo de lesión en base a descriptores anatómicos y funcionales que se relacionan con la inestabilidad articular en rodilla y tobillo en jugadores de baloncesto no profesionales (Proposal of a predictive model of injury

Retos ◽  
2020 ◽  
pp. 257-263
Author(s):  
Claudio Mauricio San Martín Barra ◽  
Germán Rojas Cabezas ◽  
Jennifer Troc Gajardo
Keyword(s):  
Predictive Model ◽  
Joint Instability ◽  
Injury Risk ◽  
Cross Sectional Study ◽  
Valgus Knee ◽  
Basketball Players ◽  
Valgus Stress ◽  
Cross Sectional ◽  
Professional Basketball ◽  
Ankle Valgus

Objetivo: Establecer un modelo predictivo de riesgo de lesión en base a descriptores anatómicos y funcionales con la inestabilidad articular en rodilla y tobillo en jugadores de baloncesto no profesionales. Diseño y participantes: Estudio no experimental, descriptivo de corte transversal, muestreo dirigido; fueron evaluados 44 sujetos universitarios de ambos sexos, 27 hombres (61,4%) y 17 mujeres (38,6%); basquetbolistas no profesionales de edad entre 18 – 26 años (22 ± 3,2), pertenecientes a la rama deportiva de basquetbol universitario de Chile. Resultados: - (p= .000) Rodilla estrés en valgo establece asociación significativa con ángulo postural en rodilla y tobillo y variables funcionales de despegue, nivel de discriminación basado modelo 82% (CC= .820). - (p= .000) Tobillo estrés valgo establece asociación significativa con el ángulo de rodilla y tobillo, variables funcionales de despegue, nivel de discriminación basado modelo 71,3% (CC= .713). - (p= .000) Riesgo general establece asociación significativa con el ángulo rodilla, variables funcionales despegue y aterrizaje, estrategia tobillo. nivel de discriminación del modelo 83,5% (CC= .835). Conclusión: Existen factores posturales, funcionales de despegue y de aterrizaje que se asocian significativamente con el riesgo de lesión de inestabilidad articular en jugadores de baloncesto no profesionales.  Abstract. Objective: To establish a predictive model of injury risk based on anatomical and functional descriptors with knee and ankle joint instability in non-professional basketball players. Design and participants: Non-experimental, descriptive cross-sectional study, directed sampling; 44 university subjects of both sexes, 27 men (61.4%) and 17 women (38.6%) were evaluated; non-professional basketball players aged between 18 - 26 years (22 ± 3.2), belonging to the sports branch of university basketball in Chile. Results: - (p = .000) Valgus knee stress establishes a significant association with postural angle in the knee and ankle and functional variables of take-off; level of discrimination based on model 82% (CC = .820). - (p = .000) Ankle valgus stress establishes a significant association with the knee and ankle angle, functional variables of take-off; level of discrimination based on model 71.3% (CC = .713). - (p = .000) General risk establishes a significant association with the knee angle, take-off and landing functional variables; ankle strategy; level of discrimination of the model 83.5% (CC = .835). Conclusion: There are postural, functional take-off, and landing factors that are significantly associated with injury risk of joint instability in non-professional basketball players.

scholarly journals Artificial intelligence and data processing in injury diagnosis and prevention in competitive sports: A literature review

2021 ◽  
Vol 13 (2) ◽  
pp. 34-37
Author(s):  
Panagiotis Poulios ◽  
Athanasios Serlis ◽  
Peter P Groumpos ◽  
Ioannis Gliatis
Keyword(s):  
Artificial Intelligence ◽  
Literature Review ◽  
Data Processing ◽  
Injury Risk ◽  
Team Sports ◽  
Competitive Sports ◽  
Sports Performance

Artificial intelligence (AI) application opens an exciting perspective for predicting injury risk and team sports performance. A better understanding of the techniques of AI employed and of the sports that are using AI is warranted. The purpose of this study is to identify which AI approaches have been applied to investigate sports performance and injury risk

scholarly journals The Acceleration and Deceleration Profiles of U-18 Women’s Basketball Players during Competitive Matches

Sports ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 165 ◽  
Author(s):  
María Reina ◽  
Javier García-Rubio ◽  
José Pino-Ortega ◽  
Sergio J. Ibáñez
Keyword(s):  
High Intensity ◽  
Team Sports ◽  
Fourth Quarter ◽  
Basketball Players ◽  
Basketball Game ◽  
Women's Basketball ◽  
Acceleration And Deceleration ◽  
Intensity Category ◽  
Acceleration Profile

The ability of a player to perform high-intensity actions can be linked to common requirements of team sports, and the ability to accelerate can be an important factor in successfully facing the opponent. The aim of this study was to determine the acceleration and deceleration profiles of U-18 women’s basketball players during competitive matches. This study categorized accelerations and decelerations by playing position and quarter. Forty-eight U-18 female basketball players from the same Spanish league participated in this study. Each player was equipped with a WimuProTM inertial device. Accelerations/decelerations were recorded. The number of accelerations and decelerations, intensity category, and type were recorded. These variables varied between quarters (first quarter, second quarter, third quarter, and fourth quarter) and playing positions (Guard, Forward and Center). The shorter but more intense accelerations took place in the last quarter, due to the tight results of the matches. Besides, players in the Guard positions performed more accelerations and their intensity was greater than that of other positions. An acceleration profile was established for the quarters of a basketball game, and was shown to depend on the playing position, being different for Guards, Forwards and Centers in U-18 women’s basketball players.

Labor’s Denial: A Case Study of How Labor Used the Media and Public Relations to Block the First NBA–ABA Merger Attempt

2017 ◽  
Vol 10 (1) ◽  
pp. 105-123
Author(s):  
William B. Anderson
Keyword(s):  
Public Relations ◽  
National Basketball Association ◽  
Basketball Players ◽  
Professional Basketball ◽  
Public Debates ◽  
The Media ◽  
Effective Use ◽  
The Impact ◽  
Basketball Teams

The owners of professional basketball teams in the National Basketball Association (NBA) and the American Basketball Association (ABA) wanted to merge the 2 leagues because a war between them over players had led to escalating salaries. The National Basketball Players Association (NBPA) responded with a lawsuit to block the merger citing antitrust regulations. When the owners went to Congress to ask for a special antitrust exemption, they were denied. This case study discusses the impact of communication on legislative lobbying, specifically how the NBPA used direct and indirect lobbying techniques to block the first NBA–ABA merger attempt. This case study offers a means to understand how and why some entities succeed in their public debates, while others fail. For the scholar, this case study adds to the limited literature on legislative lobbying from a communication perspective. For the practitioner, this study provides some guidelines for the effective use of lobbying.

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