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Erratum. Absence of Monotony and Strain Effects on Referees’ Physical Performance During International Basketball Federation World Cup Basketball Competition

International Journal of Sports Physiology and Performance

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Is the 5-Minute Time-Trial Cycling Test a Valid Predictor of Maximal Oxygen Uptake? An External Cross-Validation Study

Fernando Klitzke Borszcz, Artur Ferreira Tramontin, Ricardo Dantas de Lucas, and Vitor Pereira Costa

Purpose: This study aimed to cross-validate a recently proposed equation for the prediction of maximal oxygen uptake ( V ˙ O 2 max ) in cycling exercise by using the average power output normalized by the body mass from a 5-minute time trial (RPO5-min) as the independent variable. Further, the study aimed to update the predictive equation using Bayesian informative prior distributions and meta-analysis. Methods: On different days, 49 male cyclists performed an incremental graded exercise test until exhaustion and a 5-minute time trial on a stationary cycle ergometer. We compared the actual V ˙ O 2 max with the predicted value obtained from the RPO5-min, using a modified Bayesian Bland–Altman agreement analysis. In addition, this study updated the data on the linear regression between V ˙ O 2 max and RPO5-min, by incorporating information from a previous study as a Bayesian informative prior distribution or via meta-analysis. Results: On average, the predicted V ˙ O 2 max using RPO5-min underestimated the actual V ˙ O 2 max by −6.6 mL·kg–1·min–1 (95% credible interval, −8.6 to −4.7 mL·kg–1·min–1). The lower and upper 95% limits of agreement were −17.2 (−22.7 to −12.3) and 3.8 (−1.0 to 9.5) mL·kg–1·min–1, respectively. When the current study’s data were analyzed using the previously published data as a Bayesian informative prior distribution, the accuracy of predicting sample means was found to be better when compared with the data combined via meta-analyses. Conclusions: The proposed equation presented systematic bias in our sample, in which the prediction underestimated the actual V ˙ O 2 max . We provide an updated equation using the previous one as the prior distribution, which could be generalized to a greater audience of cyclists.

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Burnout, Help Seeking, and Perceptions of Psychological Safety and Stigma Among National Collegiate Athletic Association Coaches

Julie M. Slowiak, Rebecca R. Osborne, Jordyn Thomas, and Adna Haasan

Sport coaches face unique work-related demands that, over time, can lead to negative well-being outcomes, such as burnout. The link between burnout and mental health is supported in the literature, and public stigma around mental health has been identified as a prominent barrier to seeking help. The aim of this study was to investigate how burnout and help-seeking attitudes of National Collegiate Athletic Association coaches are impacted by psychological safety and public stigma associated with seeking help. A sample of 187 National Collegiate Athletic Association coaches participated in a cross-sectional online survey and reported sociodemographic and job-related characteristics, public stigma, self and team psychological safety, burnout, and attitudes toward help seeking. Regression-based mediation analyses revealed that greater psychological safety predicted lower levels of exhaustion and disengagement as well as more positive help-seeking attitudes. In addition, public stigma partially mediated the influence of psychological safety on exhaustion and disengagement and fully mediated the relationship between psychological safety and help-seeking attitudes. No differences in exhaustion, disengagement, and help-seeking attitudes among National Collegiate Athletic Association coaches across Divisions I, II, and III were observed. Findings lend support for intervention development to increase psychological safety as a burnout management strategy as well as to reduce public stigma associated with help seeking.

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Volume 41 (2024): Issue 2 (Apr 2024)

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Effect of Level of Competition and Drill Typology on Internal and External Load in Male Volleyball Players During the Preseason Period

Gilbertas Kerpe, Aurelijus Kazys Zuoza, and Daniele Conte

Purpose: This study aimed at evaluating the effect of level of competition and drill typology on loads during the preseason period in male volleyball players. Methods: Internal (percentage of peak heart rate [HR] and summated HR zone) and external (PlayerLoad per minute, total and high accelerations per minute [tACCmin and hACCmin], decelerations per minute [tDECmin and hDECmin], and jumps per minute [tJUMPmin and hJUMPmin]) loads were monitored across a 5-week preseason period in 12 Division 1 (age: 22.5 [3.9] y; stature: 188 [6.2] cm; body mass: 85 [11.6] kg; training experience: 9.4 [4.2] y) and 12 Division 2 (age: 20.7 [2.9] y; stature: 186 [6.2] cm; body mass: 77.8 [9.6] kg; training experience: 5.6 [2.3] y) male volleyball players. Furthermore, differences in load were assessed for each drill typology (warm-up, conditioning, technical, tactical, and integral). Results: No effects (P > .05) of level of competition on the internal (except for summated HR zone, P = .05) and external loads (except for tJUMPmin, P = .002) were found. Differently, drill typologies showed an effect (P < .001) on all the investigated internal- and external-load measures. The main post hoc results revealed higher (P < .05) percentage of peak HR, summated HR zone, PlayerLoad per minute, and tACCmin in warm-up and conditioning drills, while higher (P < .05) hDECmin and hJUMPmin were found in tactical and integral drills. Conclusions: These results suggest that volleyball coaches use warm-up and conditioning drills when aiming at increasing the internal loads, PlayerLoad per minute, and tACCmin, while tactical and integral drills should be preferred to enhance the number of hDECmin and hJUMPmin.

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Greater Psychophysiological Intensities in Conditioned Games May Impair Technical Performance: An Exploratory Study in Youth Male Soccer Players

Filipe Manuel Clemente

Purpose: The aim of this study was 2-fold: (1) to examine the relationships between psychophysiological responses and locomotor demands with variations in technical performance during 2v2 and 4v4 conditioned games and (2) to compare psychophysiological and locomotor responses among players exhibiting higher and lower technical performance levels during the conditioned games. Methods : Twenty-four male youth soccer players (16.3 ± 0.8 y old) participating at the trained/developmental level underwent monitoring for psychophysiological responses (including heart rate, rating of perceived exertion, and visual analog scale), locomotor demands (such as distance covered), and technical performance variables (including successful and unsuccessful passes and shots, as well as lost balls) across 2v2 and 4v4 formats. These formats were applied 4 times within a single session and were replicated twice over 2 weeks. Results: Large correlations between the number of lost balls per minute and mean heart rate were found in both the 2v2 and 4v4 games (r = .586 and r = .665, respectively). Successful shots were inversely and largely correlated with mean heart rate (r = −.518) in 4v4 games. The number of interceptions per minute was inversely and significantly correlated with the visual analog scale in 2v2 and 4v4 games (r = −.455 and r = −.710, respectively). The frequency of lost balls was significantly higher among players who attained a higher mean heart rate (2v2: +42.9%, P = .031, d = −0.965; 4v4: +57.1%, P < .001, d = −2.072). Conclusions: Coaches should be aware that highly psychophysiologically demanding scenarios may significantly impair technical performance. Therefore, prioritizing technical performance by deliberately adjusting the intensity should be considered.

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The Influence of Blind Tennis on Subjective Inclusion Experiences—An Ableism-Critical Analysis

Felix Oldörp, Martin Giese, and Michelle Grenier

In this paper, we analyze the subjective inclusion experiences of visually impaired (VI) adult tennis players from an ableism-critical perspective. The primary focus of this research is the inclusive potential of blind tennis from the perspective of VI individuals. Episodic interviews were conducted to capture subjective perspectives. A qualitative text analysis revealed that the interviewees were confronted with multiple ability assumptions by sighted people in their everyday lives. Deficit notions on the performance of VI people included sports, work, and general activities. Participation in blind tennis helped the interviewees build a “competent identity” and acquire various skills useful for their everyday lives as participation in blind tennis was a pathway for competence in sports. Further research is needed to identify exclusion experiences from the perspective of disabled people to recognize the potential of different sports in reducing barriers to participation.

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Volume 19 (2024): Issue 4 (Apr 2024)

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Volume 43 (2024): Issue 2 (Apr 2024)

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Understanding Well-Being in High-Performance Coaches: A Constructivist Grounded Theory Approach

Marketa Simova, Peter Olusoga, Christopher J. Brown, and Stiliani “Ani” Chroni

Objectives: The purpose of the study was to explore, in depth, well-being within the unique context of high-performance sports coaching. The aim was to capture the process of well-being while considering the contextual nuances and influences of high-performance coaching environments in a mid-range theory of coaches’ well-being. Design: Constructivist grounded theory served as a guiding approach for data collection and analysis. Method: Individual interviews (n = 20) were conducted with methodological rigour enhanced by originality, usefulness, resonance, and credibility. Aligned with the methodology, we utilised theoretical sampling to aid the development of individual categories. Results: Findings suggest that well-being is an integrating process between coaches’ personal values (identity) and culturally prescribed values (identity), with a degree of harmony as the overall goal. Conclusion: The mid-range theory presents a contextually bound process of coaches’ well-being. It provides a more practical insight into the area and highlights the importance of cultural considerations and competencies.