bluuebunny/crossref_metadata_2025_split huggingface dataset:
Match Exposure, Consecutive Match Number, and Recovery Days Affect Match Running During International Women's Soccer Tournaments
Authors: Brown Georgia A. , Massard Tim , Wignell Tony , McCall Alan , Duffield Rob 
Published: December 2023

Abstract
Brown, G, Massard, T, Wignell, T, McCall, A, and Duffield, R. Match exposure, consecutive match number, and recovery days affect match running during international women’s soccer tournaments. J Strength Cond Res XX(X): 000–000, 2023—To determine the influence of tournament-specific factors (match exposure, consecutive matches, and days between matches) on match running in women's international soccer players (footballers), 28 players from 1 national team were observed over 4 international tournaments using 10 Hz global positioning system units. Linear mixed models with a forward selection approach were used to analyze the collective effect of tournament-specific factors of match exposure (playing time), consecutive matches (count), days between matches (count) and time on pitch on relative (min−1) match running metrics (total distance, high-speed running, very high-speed running, accelerations, and decelerations), and the change in these metrics between halves. The significance level was set at p < 0.05. Days between matches were included in the final models for total distance (p < 0.0001), high-speed running (p = 0.002), very high-speed running (p = 0.025), and change in accelerations (p < 0.0001) and decelerations (p = 0.002). Prior match exposure was included in the models for total distance (p = 0.021), change in total distance (p < 0.0001), and change in high-speed running (p = 0.0008). Consecutive match number was included in the model for deceleration (p = 0.030), change in very high-speed running (p = 0.016), change in acceleration (p < 0.0001), and change in deceleration (p < 0.0001). Time on pitch was included in the final total distance (p = 0.044), high-speed running (p < 0.0001), acceleration (p < 0.0001), and deceleration (p = 0.0003) models. Overall, reduced match running throughout tournaments was associated with increased time on pitch and ≤3 days between matches. Increasing match exposure and more time between matches minimizes reductions in match running between halves. Practitioners can use these variables to inform player monitoring during international soccer tournaments and on return to clubs.
Vertical Versus Horizontal Training for Improving the Change of Direction Speed in Adult Basketball Players: A Systematic Review and Meta-analysis
Authors: Barrera-Domínguez Francisco J. , Martínez-García Dario , Jerez-Mayorga Daniel , Chirosa-Ríos Luís Javier , Almagro Bartolomé J. , Molina-López Jorge 
Published: December 2023

Abstract
Barrera-Domínguez, FJ, Martínez-García, D, Jerez-Mayorga, D, Chirosa-Ríos, LJ, Almagro, BJ, and Molina-López, J. Vertical versus horizontal training for improving the change of direction speed in adult basketball players: a systematic review and meta-analysis. J Strength Cond Res XX(X): 000–000, 2023—The ability to perform changes of direction (COD) is a complex skill that involves the application of multiple force-orientations, and its execution at maximum speed is crucial in basketball players. The present study aimed to synthesize findings from previous interventions classified according to force-orientation (vertical, horizontal, or mixed) and determine their magnitude of the effect on COD performance in basketball players. A systematic review of the literature was performed in several databases (Web of Science, Scopus, SPORTDiscus, and PubMed) following the PRISMA statement and reviewed the quality of the included papers according to the Cochrane Collaboration Guidelines Assessment. Sixteen articles with a total of 21 reports were included to analyze the role of force-orientations in COD performance. For the meta-analysis, the standardized mean differences with 95% confidence intervals (CIs) were calculated to determine the chronic changes induced by training and performed an effect size (ES) analysis with a random-effects model. The results showed that all force-orientations generated improvements in COD performance (ES = −0.47 [95% CI −0.57, −0.36], Z = 8.74 [p < 0.01]). It was a mixed force-orientation that produced the greatest changes (ES = −0.91 [95% CI −1.27, −0.55], Z = 4.96 [p < 0.01]), followed by vertical training (ES = −0.45 [95% CI −0.70, −0.20], Z = 3.51 [p < 0.01]). Horizontal training was the least studied and showed the smallest change (ES = −0.10 [95% CI −0.14, −0.07], Z = 5,71 [p < 0.01]). This meta-analysis demonstrates that mixed vertical and horizontally oriented training may be the most optimal because it offers a greater variety of multidirectional stimuli that better prepares the athlete to deal with complex COD in real-game situations.
Concurrent Validity and Reliability of In-Field Vertical Jump Performance Measures on Sand Surfaces
Authors: Wirtz Svenja , Julian Ross , Schmale Rieke , Eils Eric 
Published: December 2023

Abstract
Wirtz, S, Julian, R, Schmale, R, and Eils, E. Concurrent validity and reliability of in-field vertical jump performance measures on sand surfaces. J Strength Cond Res XX(X): 000–000, 2023—Beach sports, such as handball, volleyball, and soccer, involve dynamic actions, primarily jumps. Nonetheless, there is a need for more established measurement devices that are both valid and feasible in accurately evaluating jumping performance on sand surfaces. This study aims to assess the reliability and concurrent validity of MyJump2 and an inertial measurement unit (VERT) for quantifying countermovement jump performance on the sand. Twenty-one subjects performed 5 countermovement jumps on the sand. Jumping height was measured simultaneously by a force plate, VERT, and MyJump2. The VERT and MyJump2 reliability measures were evaluated using the intraclass correlation coefficients (ICC) for both absolute agreement (ICC2,1) and consistency (ICC3.1). The day-to-day reliability of both devices and the interrater and intrarater reliability of the MyJump2 were assessed. The concurrent validity of the VERT and MyJump2 was assessed using ICCs2.1, 3.1 and Bland-Altman plots. A near-perfect agreement was seen for intrarater (ICC = 0.98) and interrater (ICC = 0.98) reliability of the MyJump2. Moreover, a near-perfect agreement was also observed when comparing the MyJump2 with the force plate (ICC = 0.92), with a mean bias of −2.31 cm. The VERT device only demonstrated a moderate agreement (ICC = 0.55) with a mean bias of 6.31 cm compared with the force plate, despite showing good day-to-day reliability (ICC = 0.79). The study's results indicate that MyJump2 is valid and reliable for assessing jump heights on sand surfaces, whereas VERT cannot be recommended.
The Countermovement Rebound Jump: Between-Session Reliability and a Comparison With the Countermovement and Drop Jump Tests
Authors: Xu Jiaqing , Turner Anthony , Comyns Thomas M. , Chavda Shyam , Bishop Chris 
Published: December 2023

Abstract
Xu, J, Turner, A, Comyns, TM, Chavda, S, and Bishop, C. The Countermovement rebound jump: between-session reliability and a comparison with the countermovement and drop jump tests. J Strength Cond Res XX(X): 000–000, 2023—The countermovement jump (CMJ) and drop jump (DJ) are widely used jump tests to evaluate an athlete's neuromuscular performance. Nevertheless, conducting both the CMJ and the DJ assessments during one testing session can demand a considerable time investment that practitioners or coaches might not always have available. This study investigated whether the countermovement rebound jump (CMRJ) could be considered a viable alternative to the CMJ and DJ tests, respectively. Thirty-three physically active students volunteered as subjects (age: 27.2 ± 5.9 years, height: 1.78 ± 0.8 cm, body mass: 77.5 ± 11.5 kg), with 18 jumps completed for each subject across 2 testing sessions. The jump height (JH) and strategy-based metrics (time to take-off [TTTO], countermovement depth [CM depth], and reactive strength index [RSI] modified for CMJ and the first jump of the CMRJ; leg stiffness [K
leg], ground contact time [GCT], and RSI for DJ and the second jump for the CMRJ) were calculated simultaneously via the impulse-momentum, flight time, double integration, and motion capture methods. All variables were examined by repeated-measures analysis of variance, 2-way random effects model intraclass correlation coefficient (ICC), coefficient of variation (CV), and standard error of measurement, with the significance set at p ≤ 0.05. All 3 jump tests showed good-to-excellent relative reliability (ICC = 0.79–0.98) and good-to-moderate CV (≤9.83), with the only exception being K
leg measured during the DJ and in the second jump of the CMRJ assessment (CV ≤ 16.01%). Of all measured metrics, significant differences were only observed regarding TTTO between jumps (p ≤ 0.027, effect size [ES] ≤ 0.49). The comparison of calculation methods indicated that the JH calculated by 4 methods were not significantly different between jump actions (p ≥ 0.254). These findings support the use of the CMRJ as a reliable alternative to the CMJ and DJ tests. However, practitioners should be mindful of using K
leg as a metric, whereas practitioners are also advised to allocate sufficient familiarization trials before implementing the CMRJ into their routine test batteries.
Combined Accentuated Eccentric Loading and Rest Redistribution in High-Volume Back Squat: Acute Kinetics and Kinematics
Authors: Chae Sungwon , Long S. Alexander , Lis Ryan P. , McDowell Kurt W. , Wagle John P. , Carroll Kevin M. , Mizuguchi Satoshi , Stone Michael H. 
Published: December 2023

Abstract
Chae, S, Long, SA, Lis, RP, McDowell, KW, Wagle, JP, Carroll, KM, Mizuguchi, S, and Stone, MH. Combined accentuated eccentric loading and rest redistribution in high-volume back squat: Acute kinetics and kinematics. J Strength Cond Res 38(4): 640–647, 2024—The purpose of this study was to explore acute kinetic and kinematic responses to combined accentuated eccentric loading and rest redistribution (AEL + RR). Resistance-trained men (n = 12, 25.6 ± 4.4 years, 1.77 ± 0.06 m, and 81.7 ± 11.4 kg) completed a back squat (BS) 1 repetition maximum (1RM) and weight releaser familiarization session. Three BS exercise conditions (sets × repetitions × eccentric/concentric loading) consisted of (a) 3 × (5 × 2) × 110/60% (AEL + RR 5), (b) 3 × (2 × 5) × 110/60% (AEL + RR 2), and (c) 3 × 10 × 60/60% 1RM (traditional sets [TS]). Weight releasers (50% 1RM) were attached to every first repetition of each cluster set (every first, third, fifth, seventh, and ninth repetition in AEL + RR 5 and every first and sixth repetition in AEL + RR 2). The AEL + RR 5 resulted in significantly (p < 0.05) greater concentric peak velocity (PV) (1.18 ± 0.17 m·s−1) and peak power (PP) (2,304 ± 499 W) compared with AEL + RR 2 (1.11 ± 0.19 m·s−1 and 2,148 ± 512 W) and TS (1.10 ± 0.14 m·s−1 and 2,079 ± 388 W). Furthermore, AEL + RR 5 resulted in significantly greater PV and PP across all 10 repetitions compared with TS. Although AEL + RR 5 resulted in significantly greater concentric mean force (MF) (1,706 ± 224 N) compared with AEL + RR 2 (1,697 ± 209 N) and TS (1,685 ± 211 N), no condition by set or repetition interactions existed. In conclusion, AEL + RR 5 increases PV and PP but has little effect on MF. Coaches might consider prescribing AEL + RR 5 to increase especially peak aspects of velocity and power outcomes.
Description of the Collective Behavior in Competition of Young Soccer Players Under-16 (U-16), Under-17 (U-17), Under-19 (U-19), and Under-23 (U-23), Considering the Areas of the Pitch and Phases of the Game
Authors: Nieto Sergio , Echeazarra Ibon , Errekagorri Ibai , Castellano Julen 
Published: December 2023

Abstract
Nieto, S, Echeazarra, I, Errekagorri, I, and Castellano, J. Description of the collective behavior in competition of young soccer players under-16 (U-16), under-17 (U-17), under-19 (U-19), and under-23 (U-23), considering the areas of the pitch and phases of the game. J Strength Cond Res 38(4): 714–723, 2024—The objective was to employ an integrated observational-notational record to describe collective behavior (CB) in competition matches of young soccer players from 4 teams, U-16, U-17, U-19, and U-23, playing for a professional soccer club academy. A total of 1,481 possessions were registered. Collective behavior, captured by GPS devices, was described with the variables: depth, surface area, stretch index, length, and width. In addition, from the notational analysis, the behavior depending on the area of the field (Z1, Z2, Z3, and Z4) and ball possession (POS), nonball possession (nPOS), and set pieces phases were contextualized. A 2-tailed analysis of variance was applied to compare the CB of the teams. Results show that: (a) in all ages/categories, CB varied significantly in and without the possession of the ball and was conditioned by the area of the pitch where the ball was; (b) CB showed higher values with the ball and greater variability without it; and (c) depending on the age, CB presented differences with larger effect sizes in depth and length, in and without the possession of the ball, in Z1 and Z2. Integrating positional data to the moment of play and areas of the field could help a more accurate analysis of the competition to better understand the CB evolution of young soccer players.
Establishing Phase Definitions for Jump and Drop Landings and an Exploratory Assessment of Performance-Related Metrics to Monitor During Testing
Authors: Harry John R. , Simms Anton , Hite Mia 
Published: December 2023

Abstract
Harry, JR, Simms, A, and Hite, M. Establishing phase definitions for jump and drop landings and an exploratory assessment of performance-related metrics to monitor during testing. J Strength Cond Res XX(X): 000–000, 2023—Landing is a common task performed in research, physical training, and competitive sporting scenarios. However, few have attempted to explore landing mechanics beyond its hypothesized link to injury potential, which ignores the key performance qualities that contribute to performance, or how quickly a landing can be completed. This is because a lack of (a) established landing phases from which important performance and injury risk metrics can be extracted and (b) metrics known to have a correlation with performance. As such, this article had 2 purposes. The first purpose was to use force platform data to identify easily extractable and understandable landing phases that contain metrics linked to both task performance and overuse injury potential. The second purpose was to explore performance-related metrics to monitor during testing. Both purposes were pursued using force platform data for the landing portion of 270 jump-landing trials performed by a sample of 14 NCAA Division 1 men's basketball players (1.98 ± 0.07 m; 94.73 ± 8.01 kg). The proposed phases can separate both jump-landing and drop-landing tasks into loading, attenuation, and control phases that consider the way vertical ground reaction force (GRF) is purposefully manipulated by the athlete, which current phase definitions fail to consider. For the second purpose, Pearson’s correlation coefficients, the corresponding statistical probabilities (α = 0.05), and a standardized strength interpretation scale for correlation coefficients (0 < trivial ≤ 0.1 < small ≤ 0.3 < moderate ≤ 0.5 < large ≤ 0.7 < very large) were used for both the group average (i.e., all individual averages pooled together) and individual data (i.e., each individual's trials pooled together). Results revealed that landing time, attenuation phase time, average vertical GRF during landing, average vertical GRF during the attenuation phase, average vertical GRF during the control phase, vertical GRF attenuation rate, and the amortization GRF (i.e., GRF at zero velocity) significantly correlated with landing performance, defined as the ratio of landing height and landing time (R ≥ ± 0.58; p < 0.05), such that favorable changes in those metrics were associated with better performance. This work provides practitioners with 2 abilities. First, practitioners currently assess jump capacity using jump-landing tests (e.g., countermovement jump) with an analysis strategy that makes use of landing data. Second, this work provides preliminary data to guide others when initially exploring landing test results before identifying metrics chosen for their own analysis.
The Influence of Strength Level on Handball-Specific Fitness Elements Between Stronger and Weaker Professional Players
Authors: Kyriacou-Rossi Andreas , Hadjicharalambous Marios , Zaras Nikolaos 
Published: December 2023

Abstract
Kyriacou-Rossi, A, Hadjicharalambous, M, and Zaras, N. The influence of strength level on handball-specific fitness elements between stronger and weaker professional players. J Strength Cond Res 38(5): 966–975, 2024—The aim of the study was to investigate the influence of strength level between stronger and weaker handball players on handball specific fitness elements and to explore the correlations between strength and sport-specific fitness elements. Twenty-one professional male handball-players (age: 25.9 ± 6.9 years; mass: 87.9 ± 13.9 kg; height: 1.81 ± 0.08 m), participated in the study. Players were divided into the stronger (SG) and weaker group (WG) according to their relative to body mass 1 repetition maximum strength (1RM). Measurements included body composition, countermovement jump (CMJ), isometric leg extension peak torque (IPT) and rate of torque development (RTD), 5-step long-jump, 0–20 m linear sprint, T-half test, throwing velocity, and 1RM in bench press and squat. No significant difference was found for body composition between SG and WG (p > 0.05). However, SG had significantly higher CMJ height (21.5%, p = 0.002), IPT (22.4%, p = 0.008), RTD relative to body mass (p < 0.05), 5-step long jump (10.9%, p = 0.005), lower 0–20 linear sprint (−6.3%, p = 0.012), lower T-half test time trial (−7.3%, p = 0.001), and higher throwing velocity compared with WG (p < 0.05). When all players included in one group, large to very large correlations were found between 1RM strength and IPT with fat-free mass (r = 0.518–0.774) and throwing velocity (r = 0.472–0.819). Very large correlations were found between RTD with fat-free mass (r = 0.760) and throwing velocity (r = 0.780–0.835). Stronger players have greater performance in all handball-fitness attributes compared with their weaker counterparts. The significant correlations between handball-specific fitness elements with strength and RTD suggest that strength training is essential for handball players as it may link to higher on court performance.
Relationships between haptoglobin and inter-alpha trypsin inhibitor heavy chain 4 levels in local and peripheral blood and systemic inflammatory response syndrome in bitches with pyometra
Authors: Kanafa Szymon , Domrazek Kinga , Dąbrowski Roman , Soler Lourdes , Kaszak Ilona , Witkowska-Piłaszewicz Olga , Dolka Izabella , Jurka Piotr 
Published: December 2023

AbstractWe aimed to assess the usefulness of monitoring inter-alpha trypsin inhibitor heavy chain 4 (ITIH4) and haptoglobin (Hp) in peripheral and local blood in canine pyometra, and evaluation the relationships among acute phase proteins (APPs), systemic inflammatory response syndrome (SIRS) and the presence of bacteria. The material was collected from bitches with pyometra and from healthy ones. Blood was taken from the cephalic and uterine veins. APPs levels were quantified by ELISA. In the peripheral circulation, the Hp was higher in animals with open-cervix pyometra (OCP) than in the closed-cervix pyometra (CCP) and the control group. The Hp concentration was not correlated with age, with the presence of SIRS or with the type of bacteria (Gram-negative, Gram-positive or mixed flora). The ITIH4 concentrations in the peripheral blood did not differ significantly in the cases of pyometra. The Hp concentration in the local circulation increased in the OCP but not in the CCP groups, although the histopathological changes in the endometrium were similar. Peripheral Hp concentrations may be a useful tool in differentiating between the types of pyometra.
Integrated Development of the Territory of the Tourist Center of the City of Kyakhta: A Development Approach
Authors: Tolstoukhova Ilona , Astafiev Sergey , Voronov Denis , Stepanov Evgeny 
Published: December 2023

The relevance of the topic of integrated development of tourist territories is due to the fact that the term «integrated development of territories» approved in the urban planning code takes into account the need for the construction of residential real estate, social and
other infrastructure, when developing urban areas providing comfortable living for residents on the territory, and it does not consider the needs of the tourists. The integrated development of tourist territories considers the need to create a comfortable consumer environment including display facilities for tourists and collective accommodation facilities. It also suggests developing a service model, an event calendar for foreign and Russian tourists, etc.
The aim of the study is to develop and substantiate a financial model for the integrated development of tourist areas and socio-economic effects the implementation of state support for regional programs for the design of the tourist code of the city center «Kyakhta — the city of the great trade routes».
The article discusses the methodology for substantiating the socio-economic effects as a result of the implementation of the project of the tourist code of the city center of Kyakhta. This project participates in the competition of the subjects of the Russian Federation for the implementation of state support for regional programs for the design of the tourist code of the city center, the operator of which is the Fe­deral Agency for Tourism (Hereinafter — the Competition). In interdisciplinary team of the Project involved experts from the Irkutsk region and the Republic of Buryatia, representatives of the Administration of the municipality «City of Kyakhta», representatives of the Ministry of Tourism of the Republic of Buryatia, active representatives of urban communities, and business corps. At the same time, the team of «ideologists» of the Project were experts from the consulting company «Novatsia», teachers and undergraduates of the Department of Construction Economics and Real Estate Management of Baikal State University who developed the project. Its main goal is to make Kyakhta one of the leading centers of the «Great Tea Road» from China to Europe, and to develop its domestic and cross-border tourism.
The result of the study was the construction of a financial model that showed that funding of 215 million will allow to create more than 80 new jobs; design 8 new user experience scenarios, and 32 new routes; double the flow of tourists and the time spent in the city center; build 13 new commercial facilities; increase the number of hotels, and prove the effectiveness of public and private investments.