Profile Of Players Research Articles

Somatotype and body composition profiles of children and adolescent male basketball players.

Somatotype and body composition (BC) are related to athletes' physical fitness and performance. The aims of this study were (a) to determine the somatotype and BC profiles of children and adolescent male basketball players and (b) to investigate the relationship between somatotype and BC. Four hundred forty-nine children and adolescent male basketball players between the ages of 7-17 participated in the study voluntarily. Somatotype scores were determined according to the Heath & Carter method, and BC was evaluated by the bioelectrical impedance analysis (BIA) method. Pearson correlation test was used to determine the relationship between somatotype and BC. A significant positive relationship between body mass (BM), body fat (BF), body mass index (BMI), and fat mass (FM) with endomorphy and mesomorphy scores; a significant negative relationship between body height (BH) with endomorphy and mesomorphy scores were found. In addition, ectomorphy scores were significantly positively correlated with BH and negative with other parameters. This current research shows that as age increases, BH, BM, BMI, and FM increase, and BF, endomorphy, and mesomorphy scores decrease. With increasing age, the somatotype score changes from endomorphic mesomorphy (5-7-2) to balanced mesomorphy (3-6-3). The comprehensive data presented in this study can serve as a reference value and be used as an indicator for children and adolescent basketball coaches.

Anthropometric Profile and Position-Specific Changes in Segmental Body Composition of Professional Football Players Throughout a Training Period.

Body and anthropometric profiles of football players vary depending on the physiological and technical demands imposed by different positions. The aim of this study was to evaluate the body composition of professional soccer players in relation to their position on the field during a training macrocycle. The Direct Segmental Multi-Frequency Bioelectrical Impedance Analysis method was used to analyze 58 players at six key moments of the macrocycle. The results show that body profiles are adjusted to the specific demands of each position. Midfielders showed the lowest muscle mass, while defenders showed many notable changes. In general, as the season progressed, all field players experienced an increase in trunk body fat. Fat and lean mass values of goalkeepers differed greatly from the rest. The greatest variations in body composition were observed during pre-season and transition in relation to variations in training load and competitive intensity. The results suggest that the phase of the macrocycle has a greater influence on these variations, although the physical characteristics of each position are relevant. Understanding these dynamics allows for the design of more personalized and efficient training programs to optimize the performance of footballers according to their roles and each stage of the season.

Basketball self-evaluation matrix: discrepancy between self-confidence and decision-making performance on psychological profiling of players.

In basketball training, self-evaluation plays a crucial role in the decision-making and execution of movements of players. The self-evaluation of players is influenced by their perception of own basketball ability and self-confidence state. This study aimed to explore potential discrepancies between self-confidence levels of players and their decision-making performance, while also characterizing different types of players. Data was collected from 20 youth basketball players who participated in a decision-making video task and a self-confidence assessment. Based on data from their self-confidence and decision-making awareness assessment, the K-means cluster analysis was used to categorize the players into different groups. Then, ANOVA and post hoc Scheffe test were conducted to compare these clusters. The cluster analysis identified four distinct profiles of players and the results of the ANOVA and post hoc Scheffe tests revealed significant differences between the four clusters. The "High Self-confidence & Low Decision-making Awareness" players might display an overconfident mindset, while the "High Self-confidence & High Decision-making Awareness" players potentially demonstrated the better performance and maintained a consistent and confident attitude. The "Low Self-confidence & High Decision-making Awareness" players appeared to lack confidence and needed to foster greater faith in their abilities. Finally, the "Low Self-confidence & Low Decision-making Awareness" players required a long-term and comprehensive training program to improve their skills. These preliminary findings informed the development of a self-evaluation matrix, designed to help coaches better understand player profiles and design tailored interventions. Moreover, this study contributes on sport calibration and enhances understanding of the behavioral and psychological states of players.

Comparative Profiling of Milk Somatic Cells Proteomes Revealed Key Players in Mammary Immune Mechanisms During Mastitis in Tropical Sahiwal (Bos indicus) Cows.

Bovine mastitis poses a significant economic burden on the dairy industry worldwide. This pioneering proteomic study conducted a comparative profiling of milk somatic cell (SC) proteins contributing to mammary immune defense during subclinical and clinical mastitis (CM) in Sahiwal (Bos indicus) cows. Based on California mastitis test (CMT) scores, milk SC counts, differential leukocyte counts (DLCs), and bacteriological culture results, quarter milk SC samples were categorized into healthy (H), subclinical mastitis (SCM), and CM groups. Comparative proteome profiling of milk SCs was done using a label-free liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) proteomic approach. The identified upregulated proteins in mastitis groups such as Vanin 2, Thioredoxin reductase-like selenoprotein T, Ceramidase, Lymphocyte antigen 75, Misshapen-like kinase 1 (MINK1), Thrombospondin 1, Macrophage scavenger receptor 1, Leupaxin, and Lipoamide acyltransferase, involved in immune responses. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed immune functions and pathways like antigen processing, complement cascades, extracellular matrix receptor interaction, efferocytosis, leukocyte migration, chemokine, peroxisome proliferator-activated receptors (PPARs), and transforming growth factor (TGF)-beta signaling. These findings provide essential information on proteomic profiling in milk SCs and contribute valuable insights into immune-related proteins regulated during mastitis in dairy cows. Further, validated proteins (Vanin 2, MINK1, and Thrombospondin 1) offer potential inflammatory biomarkers for early mastitis detection in dairy cows.

Analysis of the physical fitness and determinants of performance of beach handball athletes

IntroductionBeach handball, an emerging team sport derived from indoor handball, is characterized by high-intensity efforts. This study aimed to analyze the physical fitness profiles of elite beach handball players of both sexes and identify the characteristics that determine anaerobic power performance among these athletes. Material and methodsA cross-sectional study was conducted with 25 elite beach handball players. Anaerobic power, sprint performance, and change-of-direction ability were assessed. ResultsThere were no significant differences between men and women in anaerobic power and change-of-direction ability. Men showed better performance in the 15-meter sprint test (p = 004). A moderately strong positive correlation was found between anaerobic power and age. BMI did not significantly correlate with power performance. ConclusionsAge is an important determinant of anaerobic power, whereas body mass index does not play a significant role, especially among males.

Effects of High-Intensity Training on Complete Blood Count, Iron Metabolism, Lipid Profile, Liver, and Kidney Function Tests of Professional Water Polo Players.

Our goal was to examine the effect of high-intensity physical activity on changes in the lipid profile, complete blood count (CBC), iron metabolism, and kidney and liver function tests of professional water polo players. This study included twenty professional male water polo players. Blood sampling was carried out at the beginning of the season and during periods of high-intensity training. CBCs were determined with a Siemens Advia 2120i hematology analyzer. A Beckman CoulterAU680 chemistry analyzer was used to determine the serum concentrations/activities of lipid profiles and liver and kidney function test analytes. The lipid athlete scores were also determined. The mean corpuscular volume (p = 0.006), platelet count (p = 0.008), and mean platelet volume (p < 0.001) significantly decreased during the high-intensity period, compared with the beginning of the season. The total iron-binding capacity increased (p = 0.001), and ferritin concentrations significantly declined (p = 0.017). The lipid profiles revealed a significant difference between phases, with slight increases in serum total (p = 0.025) and LDL cholesterol (p = 0.002) levels and a decrease in triglyceride concentrations (p = 0.040) in the high-intensity period. During the high-intensity period, the liver and kidney function tests showed a substantial positive effect on lactate dehydrogenase levels (p < 0.001), aspartate aminotransferase (p = 0.028) serum activity, and total protein concentrations (p = 0.033), compared with the beginning of the season. Water polo players might exhibit a decrease in some CBC parameters, an increase in LDL cholesterol, and a decrease in liver function biomarkers due to intense training at the peak of the competitive season. Kidney function biomarkers remain unchanged.

Physical performance and technical specific skills of women football players with cerebral palsy

This study aimed to determine the physical performance profile (ability to change direction, vertical and horizontal jump, sprint ability, and dribbling-specific skills) of the first women football players with cerebral palsy (CP) who participated in an international CP football competition, accounting for their sport classes. We also examined the relationships between the different physical performance variables. Forty-five female players with CP (24.9 ± 7.5 years) were categorised into three sport classes based on their impairment severity: 19 were FT1 (severe impairments); 21 FT2; and 5 FT3 (mild impairments). Various physical performance tests were conducted, including the 505 change of direction test; vertical and horizontal jumps; 10 m sprint test; and the dribbling speed test. Significant correlations were observed between the change of direction ability, sprint (r = 0.89; p < 0.01), and dribbling tests (r = 0.71; p < 0.01), as well as between horizontal jump and sprint time (r = − 0.74; p < 0.01). FT1 players demonstrated poorer performance compared to FT3 in the 505 test and standing broad jump (p < 0.05; dg = −1.79 and 1.22 respectively), but also lower vertical jump heights (p < 0.05; dg = −0.91 to −1.57) and increased time required for sprint (p < 0.05; dg = 0.88 to 1.16) and dribbling tests (p < 0.05; dg = 0.85 to 1.44) compared to both FT2 and FT3 players. These findings offer valuable insights into the physical performance characteristics of female footballers with CP, which can guide training and sport enhancement programs for this unique para-sport population.

The isometric and isokinetic knee extension and flexion muscle strength profile of elite soccer players

BackgroundThis study aimed to further complete normative data sets for the strength profile of the thigh in soccer players by performing isometric and isokinetic measurements in a large sample per player position.MethodsIn total, 364 soccer players were divided into subgroups according to their pitch position. All players performed isometric and isokinetic strength measurements during active competition period using an isokinetic dynamometer (System 3, Biodex®, ENRAF-NONIUS, New York, USA).ResultsIsokinetic strength of m. Quadriceps was significantly (p = 0.023) higher in strikers compared to central midfielders in both the dominant (+ 9%) and the non-dominant (+ 4%) leg. No further differences were found in isometric or isokinetic strength per playing positions.ConclusionsWe have shown that strength profiles do not differ between playing positions on the field. This is valuable information for elite soccer high performance coaches and medical staffs aiming to improve daily training efficiency and rehabilitation of their players.

Extending a MAPE-K loop-based framework for Dynamic Difficulty Adjustment in single-player games

Dynamic Difficulty Adjustment (DDA) has emerged as a notable solution to address the demand for adaptive gameplay in digital games. However, the DDA domain presents various research challenges that require careful consideration. In response, this study introduces an approach that merges insights from self-adaptive systems with the specific requirements of adaptive gameplay. Our contribution involves extending the DDA-MAPEKit framework, which was previously presented. Constructed on the modular MAPE-K loop foundation, this solution facilitates the assimilation of multiple DDA strategies. The primary objective is to provide tailored treatment for distinct game mechanics (or groups of mechanics) by constructing individual MAPE-K loops for each of them. Notable enhancements include the development of a descriptive player model involving continuous player profile assessment, performance calculation, and modifications to the rules’ system to better align with the player’s conditions. A proof of concept is executed by applying DDA-MAPEKit in a Space Shooter game to assess the viability of the proposed model. Simulations are conducted both with and without the DDA mechanisms. Encouraging results are obtained through a comparative analysis of the gathered data. Evidence points out that incorporating the DDA mechanism, implemented with DDA-MAPEKit, may effectively lead to adapting variables depicting the complexity of game mechanics following the player’s performance. This fact underscores the potential effectiveness of our approach in addressing the challenges within the realm of DDA.

Physiological profile of professional handball players regarding playing position

In the handball game players occupied specific position which requires unique physiological and physical attributes relating to technical and tactical requirements of each position in order to maximize sport performance on the court. The aim of this study was to quantify anthropometrical and physiological characteristics in elite Macedonian handball players and compare them regarding four different playing positions. In this study were included55handball players, different nationality, from RNM, participated in ergometry testing with Bruce protocol and body mass analysis with bioelectrical impedance analyzer, InBody 720. The players were divided in four groups according to playing position: wings (W), backs (B), pivots (P) and goalkeepers (G). Anthropometric parameters for all players were following: mean height was 186.3±7.1 cm, weight =85.37±13.7 kg, skeletal muscle mass (SMM) = 42.04 ± 6.2 kg; BMI = 24.54±2.8; BF%=13.4 ± 4.75 and WHR = 0.85± 0.06. Regarding the position, B/W/P/G for height were: 187.14 cm /180.0 cm/191.77 cm/186.8 cm; weight: 85.72 kg/72.67 kg/ 99.67 kg/85.33 kg; body fat percent: 12.26 %/11.92 %/16.3 %/14.7 %. The mean values for maximal oxygen consumption for B/W/P/G were 48.86/44.31/44.09/47.78 ml/kg/min. The BIA parameters of body composition in handball players regarding the playing position, showed statistically significant differences for all lean body mass parameters and obesity diagnose parameters, except for the body fat percent. According the cardio-physiological parameters derived from Bruce protocol handball players at different playing position had similar aerobic capacity.

Match-related activity profiles of youth female and male football players during World Cup classification tournaments and their relationship to body composition.

The activity profiles of football players during competition can be affected by the athletes' competitive level and sex. However, evidence of this in youth South American athletes is scarce as is the effects of body composition on match activity profiles. Therefore, the present study compared the activity profiles of Chilean under-20 (U20) and under-17 (U17) male and female teams during the World Cup qualification tournaments (WC) using a multicomponent athlete monitoring system and explored the relationships between these profiles and the players' body composition. Athlete's body composition was measured as there were total distance, distance covered at different velocities, explosive efforts, sprints, and estimated player load (PL) during the 2018-2019 World Cup Qualifiers. Males had greater muscle and lower fat mass than females and covered 10.8% more total distance with maximal speed being 15.3% faster in match play (P<0.05). However, females covered more distance at higher running speeds and had a greater number of sprints (P<0.05). For males, the U20 club was 3.7% faster and performed 26.3% more explosive efforts than the U17 club (P<0.05). Contrastingly, the female U17 club covered more total distance, more distance at different speeds had more total sprints, greater PL, and muscle mass than the U20 club (P<0.05). Across all athletes, fat mass correlated negatively to total distance (R=-0.39; P=0.001), while muscle mass correlated positively with maximal speed (R=0.72; P=0.001). Gender, competitive level, and body composition seem to affect match-activity profiles in football players during WC qualifiers.

Personality Profile of Elite Male Badminton Players of Bangladesh

Background: Psychology is the scientific study of human mind and its functions, especially those which affect behaviour in a given context. A personality profile is a comprehensive assessment that provides insights into an individual's psychological characteristics, behavioural tendencies, and emotional attributes. Objective: The purpose of the present study was to analyze and understand the personality profile of elite male badminton players of Bangladesh. Methods: The personality profile was measured for the present study. For assessing personality profile, 16 PF questionnaire which was developed by Cattell was considered. Personality factors were assessed using Bengali version of Raymond Cattell’s 16 PF questionnaires (Form-C) developed and standardized by Bose and Chatterjee (1984), Department of Applied Psychology, University of Calcutta. The 16 PF questionnaire was included total sixteen factors i.e. Factor A-reserved v/s outgoing; Factor B- less intelligent v/s more intelligent; Factor C-economically less stable v/s economically stable; Factor E- humble v/s assertive; Factor F-sober v/s enthusiastic; Factor G-expedient v/s conscientious; Factor H- shy v/s venturesome; Factor I-tough minded v/s tender minded; Factor L- trusting v/s suspicious; Factor M-practical v/s imaginative; Factor N-forthright v/s shrewd; Factor O- self assured vs. apprehensive; Factor Q1- conservative vs. liberal; Factor Q2- Group oriented v/s self sufficient; Factor Q3- undisciplined self-conflict v/s following self image; Factor Q4- relaxed v/s tensed. Total hundred male badminton players (n=100) who were attending National Coaching Camp of Bangladesh were selected as subjects. The collected data of personality factors were analyzed using descriptive and analytical statistics. Results: The results of the present study revealed that the subjects were lower average in Factor H. On the other hand they were also found to be higher than the normal in Factors G and Q3. In respect of other factors they had found average standard mean values. Conclusions: National level male badminton players of Bangladesh appear to be average in personality traits including; A (warmth), C (emotional stability), E (dominance), F (liveliness), I (sensitivity), L (vigilance), N (privateness, O (apprehension), Q1 (openness to change), and Q4 (tensions ). It is also found that they have less reasoning ability (Factor B), be shy, sensitive, and hesitant (Factor H) in respect of social boldness. National level male badminton players of Bangladesh appear to be dutiful and rule bound (Factor G), imaginative (Factor M), self reliant (Factor Q2) and socially precise (Factor Q3)) conscientious in respect of rule consciousness.

Physical Profiles of All-Rounders, Batters, and Bowlers in Sub-Elite Women's Cricket.

Jacobs, J, Olivier, B, Brandt, C, and Jafta, G. Physical profiles of all-rounders, batters, and bowlers in sub-elite women's cricket. J Strength Cond Res 38(6): 1095-1102, 2024-The unique physical profile of each player's role in sub-elite women's cricket is vital for optimizing performance as these players progress to the elite levels. This quantitative, cross-sectional study investigates the physical profiles of sub-elite women's cricket players as a group and compares these profiles across different player roles. Sub-elite female cricket players in the South African domestic women's cricket league were included in this study. A battery of physical assessments were conducted at the start of the 2022/23 season. The physical assessments included body composition, individual muscle strength testing using dynamometry, 2-km time trial (TT), countermovement jump (CMJ), single-leg jump (SLJ), isometric mid-thigh pull, push-up, and hop test on force plates. A total of 44 female players (20.86 ± 1.6 years) were included in the study. Differences were found in muscle mass (p = 0.004) and peak power (p = 0.040) for all-rounders and bowlers. Player roles presented with different dominant (p = 0.006) and non-dominant (p = 0.066) knee flexion strength. The bowlers' body composition and physical strength profile are compromised compared with batters and all-rounders. There were several physical strength and power differences between pace and spin bowlers in CMJ and SLJ tests for jump height (p = 0.009) and peak power (p = 0.006). Batters performed the best in the 2-km TT. Body composition and musculoskeletal profiles for each player role can be baseline markers in sub-elite women's cricket. Stakeholders can use this information to guide physical preparation for players advancing to elite levels.

A comparative review of the physical conditioning profiles of male South African amateur and professional soccer players

A comparative review of the physical conditioning profiles of male South African amateur and professional soccer players

The Effect of Sleep on the Health and Dietary Behaviours of GAA Athletes.

Decreased sleep quality and duration is associated with an array of negative health outcomes. Evidence suggests athletes are susceptible to sleep inadequacies that may in turn affect their health and dietary behaviours. This study aimed to explore the sleep profile of both male and female Gaelic games players, at an elite and sub-elite level and compare how poor sleep relates to subjective health complaints and food cravings. One hundred and seventy Gaelic games players completed the Pittsburgh Sleep Quality Index (PSQI), Subjective Health Complaints Inventory (SHC) and Food Cravings Questionnaire-Trait-Reduced (FCQ-T-r). Participants were categorised into two groups: poor sleepers (PSQI ≥ 5) and good sleepers (PSQI < 5). Outcome measures of health and food cravings were analysed across the groups, Mann-Whitney U tests were used to assess differences, and Spearman's rank-order correlations were used to determine relationships between variables. Sixty-seven % of athletes were categorised as poor sleepers. There were no significant differences in PSQI scores across genders (p = 0.088) or playing level (p = 0.072). Poor sleepers experienced significantly increased SHC (p < 0.001) and female athletes had significantly more SHC compared to males (p < 0.001). Female athletes experienced more food cravings than males (p = 0.013). However, there were no significant differences in food cravings between good and poor sleepers (p = 0.104). The findings suggest a high prevalence of poor sleepers amongst GAA athletes. Furthermore, a significant relationship exists between poor sleep and health complaints with females at a higher risk of worsened health complaints and higher food cravings. Sleep screening and education interventions to enhance sleep in GAA athletes are advocated.

Position-Specific Movement Characteristics and Heart Rate Profile of Hearing-Impaired Futsal Players: A Simulated Game Analysis

The aim of this study is to compare the movement characteristics and heart rate (HR) response of hearing-impaired futsal players based on their playing positions during a simulated game. The study involved twelve players from the Turkish Deaf Men's Futsal National Team, and PlayerLoad (PL) metrics such as total PL (PLTOTAL), PL per minute (PL·min⁻¹), peak PL (PLPEAK), low to very high PL bands (PLLOW-PLVHIGH), and external load variables such as acceleration (ACC), deceleration (DEC), explosive efforts (EXPEFF), and right/left change of direction (COD-R, COD-L), were analyzed using inertial movement analysis (IMA). Additionally, the internal load metrics, including minimum, average, and maximum HR (HRMIN, HRAVE, HRMAX), percentage of HRMAX (%HRMAX) and percentage of time spent in different HR zones (HRZONE1 to HRZONE4) were continuously monitored. IMA variables and HR metrics, based on playing position, were analysed with the Kruskal-Wallis H test. Group comparisons were conducted using the Mann-Whitney U test, and Bonferroni correction was applied. As a result, PL variables change with notable distinctions between defenders and wingers. Additionally, the PLVHIGH stands out as the only significant difference when comparing wingers and pivots. Wingers generally exhibit different external load, including ACC and COD-L, compared to defenders. Additionally, differences were observed in COD-L between pivots and defenders, as well as in COD-R between pivots and wingers. In conclusion, external and internal load metrics during the simulated game vary depending on the players’ positions in hearing-impaired futsal players, highlighting the importance for coaches to consider this diversity in their athlete monitoring approaches.

Need a break? The locomotor and tackle pacing profile and loads of women’s rugby league match-play following various between-match turnaround durations

ABSTRACT Objectives The study investigated the locomotor and tackle pacing profile and loads of female rugby league players following various between-match turnaround durations. Specifically, the study examined the (1) pacing of locomotor and tackle loads across the time-course of a match and; (2) whole-match and peak locomotor and tackle loads of match-play. Methods Microtechnology data were collected from elite female rugby league players (n = 172) representing all National Rugby League Women’s teams (n = 6 teams) across two seasons. Players were categorised into backs, adjustables, forwards or interchange players. Data was calculated for the whole-match (m), per minute (m.min−1) and peak (running: m.min−1; acceleration: m.s−2) locomotor and tackle loads (number and efficiency (%)) of match-play. The pacing as well as the locomotor and tackle loads of match-play were examined following short (≤6 days), normal (7 days) or long (≥8 days) turnarounds. Results The pacing profile of playing positions varied across short, normal and long match turnarounds. Trivial to moderate differences existed in the whole-match, per minute and peak locomotor loads across match turnaround durations (effect size ≤ 1.2). Conclusions Following various between-match turnaround durations (i.e., short, normal and long match turnarounds), there were variations in the locomotor and tackle pacing profile and loads whereby, the pacing profile of positional groups was more affected than the load profile. The findings can be used in applied settings to guide the recovery strategies and training plans of female rugby league players to optimise performance and wellbeing across various match turnaround durations.

Profile of Accelerations and Decelerations in Young Basketball Players

Profile of Accelerations and Decelerations in Young Basketball Players

The effect of a 10-week TOCA Football System intervention program on sport-specific motor skills among junior footballers.

The objective of our study was to examine, in addition to using the TOCA Football System tool and training method, the effect of a 10-week intervention on elite youth athletes in terms of their sport-specific motor skills and anthropometric variables. The study covered a group of 32 young players practicing football (U14) (13.45 ± 0.64 years). The junior U14 footballers were randomly assigned to an intervention or TOCA group (TG, N = 15, 13.25 ± 0.58 years) and a control group (CG, N = 17, 13.63 ± 0.66 years). Before starting the test, we performed full anthropometric measurements and assessed the sample's agility with and without the ball and their sport-specific endurance. The measurements were then repeated after the 10-week intervention. Within-group analysis showed significant improvements in muscle mass (p < 0.001), sport-specific endurance (p < 0.001), (p < 0.004) and agility (in TG) both with and without the ball (p = 0.002), (p = 0.004) however, we did not find a significant change in body fat percentage in either group (p = 0.988, p = 0.288). In the CG, "agility with the ball" changed significantly only (p = 0.023). In the between-group analysis with a repeated-measures analysis of variance (mixed-design ANOVA), there was no significant interaction in any performance variables. The main findings of this study indicate that a TOCA Football training program in addition to normal training during the in-season period does not produce additional effects in anthropometric factors, sport-specific endurance and agility performance with the ball (dribbling) and without the ball in comparison with the control condition. From a practical point of view, the presented anthropometric and physical profiles of players can be useful for football coaches in optimizing soccer training. Overall, it also can be concluded that the device can be safely used in the sensitive age group in terms of the development of motor skills since we did not find any negative effects during the use of the device in terms of the parameters we examined. In addition to the expansion of the number of elements and the inclusion of other age groups, it is advisable to carry out further complex tests, as the TOCA Football System offers many research opportunities.

Vertical jump neuromuscular performance of professional female handball players-starters vs. non-starters comparison.

Given the complex nature of the handball as a game, players are required to possess a distinct set of physical and physiological attributes to attain peak performance. With the countermovement vertical jump (CVJ) being widely implemented as a non-invasive and time-efficient testing modality in sports settings, the purpose of the present study was twofold: (a) to establish a CVJ profile of professional female handball players and (b) to examine differences in force-time metrics between starters and non-starters. Forty-two professional female handball players (e.g., SuperLeague) volunteered to participate in this study. Each athlete performed three maximum-effort CVJs with no arm swing while standing on a uni-axial force plate system sampling at 1,000 Hz. Independent t-tests were used to examine differences in each variable between starters and non-starters. The results revealed that starters attained superior performance within the eccentric phase of the CVJ when compared to non-starters, particularly in terms of eccentric peak velocity (-0.957 ± 0.242 vs. -0.794 ± 0.177 m·s-1), eccentric mean power (320.0 ± 77.7 vs. 267.1 ± 75.2 W), and eccentric peak power (929.0 ± 388.1 vs. 684.4 ± 214.2 W). While not reaching the level of statistical significance, moderate-to-large effect sizes were observed for concentric impulse, peak velocity, and mean and peak force and power, all in favor of players included in the starting lineup (g = 0.439-0.655). Overall, these findings suggest that at the top-tier level of handball competition, the ability to secure a spot in a starting lineup may be possibly influenced by the athlete's eccentric performance capabilities. Thus, the development of lower-body eccentric strength and power may positively impact on-court athlete performance and ultimately help the team secure the desired game outcome.