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Volume 19 (2024): Issue 6 (Jun 2024)

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Volume 32 (2024): Issue 3 (Jun 2024)

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Volume 18 (2024): Issue 2 (Jun 2024)

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

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Volume 38 (2024): Issue 2 (Jun 2024)

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The Autoregulation Rest-Redistribution Training Method Mitigates Sex Differences in Neuromuscular and Perceived Fatigue During Resistance Training

Antonio Dello Iacono, Kevin Watson, and Ivan Jukic

Purpose: To examine the sex differences in performance and perceived fatigue during resistance training prescribed using traditional (TRA) and autoregulation rest-redistribution training (ARRT) approaches. Methods: Twelve resistance-trained men and 12 women completed 2 sessions including the bench-press exercise matched for load (75% of 1-repetition maximum), volume (24 repetitions), and total rest (240 s). Sessions were performed in a counterbalanced randomized design with TRA consisting of 3 sets of 8 repetitions with 120-second interset rest and ARRT employing a personalized combination of clusters, repetitions per cluster, and between-clusters rest regulated with a 20% velocity-loss threshold. The effects of TRA and ARRT on velocity loss, unilateral isometric peak force, and rating of fatigue (ROF) were compared between sexes. Results: The velocity loss was generally lower during ARRT compared with TRA (−0.47% [0.11%]), with velocity loss being mitigated by ARRT to a greater extent among males compared with females (−0.37% [0.15%]). A smaller unilateral isometric peak force decline was observed after ARRT than TRA among males compared with females (−38.4 [8.4] N). Lower ROF after ARRT than TRA was found among males compared to females (−1.97 [0.55] AU). Additionally, males reported greater ROF than females across both conditions (1.92 [0.53] AU), and ARRT resulted in lower ROF than TRA overall (−0.83 [0.39] AU). Conclusions: The ARRT approach resulted in decreased velocity loss, peak force impairment, and ROF compared with TRA in both sexes. However, male subjects exhibited more pronounced acute within-session benefits from the ARRT method.

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Sport Management Research Productivity and Impact for Ranking Considerations

Chad Seifried, J. Michael Martinez, Yizhou Qian, Claire Zvosec, Per G. Svensson, Brian P. Soebbing, and Kwame Agyemang

The present essay aims to promote further dialogue within the sport management community about research productivity and impact by outlining various considerations that should take place within any potential ranking attempt. Some may question why examining research production and impact matters to sport management education, but the mission of many institutions of higher education is not exclusively centered on teaching and training the next generation of leaders. In many instances, sport management programs and faculty are collectively compelled by their host institution to develop theory and search for answers to important questions that can shape future sport management practices, including classroom activities and materials. In the present essay, a rationale is provided for why sport management programs and individual faculty should be interested in developing their own tailored research output and impact rankings. Next, a list of research product variables is offered for consideration, and a conversation is provided about their need and impact with respect to the uniqueness of sport management—a multi-interdisciplinary field. Finally, recommendations for the weighing of such variables to tailor an approach best suited to programs based on college or department home, faculty appointment/workload, and faculty-to-student ratio are submitted.

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Subjective and Objective Monitoring Markers: Are They Related to Game Performance Indicators in Elite Female Volleyball Players?

André Rebelo, Diogo V. Martinho, Inês G. Pires, Inês Arrais, Ricardo Lima, João Valente-dos-Santos, and João R. Pereira

Purpose: This cohort study aimed to investigate the relationship between subjective (wellness and internal training load [ITL]) and objective (neuromuscular fatigue) monitoring markers and performance aspects (reception quality [RQ] and attack efficiency [AE]) in professional female volleyball players. Methods: The study was conducted over an 8-week period during the final mesocycle of the competitive phase. A total of 24 training sessions and 10 matches were included in the analysis. Subjective measures of wellness and ITL were assessed, and neuromuscular fatigue was evaluated using countermovement-jump (CMJ) height. RQ and AE were determined based on game statistics. Results: The study found a positive relationship between wellness and RQ, particularly affecting outside hitters and liberos. ITL showed a positive association with AE, primarily impacting outside hitters, opposite hitters, and middle blockers. Additionally, ITL demonstrated a negative correlation with RQ, mainly affecting outside hitters and liberos. CMJ performance was associated with AE, where a decrease in CMJ height was linked to reduced AE. Conclusions: The findings highlight the importance of considering players’ wellness scores in training and match strategies for different positions. Careful management of training loads, considering both physical and technical demands, is crucial for optimizing performance outcomes. Monitoring neuromuscular fatigue, as indicated by CMJ performance, is particularly relevant for outside hitters, opposite hitters, and middle blockers involved in attack actions. Coaches, trainers, and sports practitioners can use these insights to develop position-specific training protocols and implement effective strategies for maintaining or improving performance metrics under various stressors.

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Erratum. Proportion and Correlates of Children in the US-Affiliated Pacific Region Meeting Sleep, Screen Time, and Physical Activity Guidelines

Journal of Physical Activity and Health

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Myths and Methodologies: Standardisation in Human Physiology Research—Should We Control the Controllables?

Lucy H. Merrell, Oliver J. Perkin, Louise Bradshaw, Harrison D. Collier-Bain, Adam J. Collins, Sophie Davies, Rachel Eddy, James A. Hickman, Anna P. Nicholas, Daniel Rees, Bruno Spellanzon, Lewis J. James, Alannah K.A. McKay, Harry A. Smith, James E. Turner, Francoise Koumanov, Jennifer Maher, Dylan Thompson, Javier T. Gonzalez, and James A. Betts

The premise of research in human physiology is to explore a multifaceted system whilst identifying one or a few outcomes of interest. Therefore, the control of potentially confounding variables requires careful thought regarding the extent of control and complexity of standardisation. One common factor to control prior to testing is diet, as food and fluid provision may deviate from participants’ habitual diets, yet a self-report and replication method can be flawed by under-reporting. Researchers may also need to consider standardisation of physical activity, whether it be through familiarisation trials, wash-out periods, or guidance on levels of physical activity to be achieved before trials. In terms of pharmacological agents, the ethical implications of standardisation require researchers to carefully consider how medications, caffeine consumption and oral contraceptive prescriptions may affect the study. For research in females, it should be considered whether standardisation between- or within-participants in regards to menstrual cycle phase is most relevant. The timing of measurements relative to various other daily events is relevant to all physiological research and so it can be important to standardise when measurements are made. This review summarises the areas of standardisation which we hope will be considered useful to anyone involved in human physiology research, including when and how one can apply standardisation to various contexts.