scholarly journals Player Chronotype Does Not Affect In-Game Performance during the Evening (>18:00 h) in Professional Male Basketball Players

2021 ◽  
Vol 3 (4) ◽  
pp. 615-623
Author(s):  
Michael Pengelly ◽  
Nathan Elsworthy ◽  
Joshua Guy ◽  
Aaron Scanlan ◽  
Michele Lastella
Keyword(s):  
Performance Measures ◽  
Team Sports ◽  
Time Of Day ◽  
Effective Field ◽  
Basketball Players ◽  
Skill Performance ◽  
Specific Skill ◽  
Morning Type ◽  
Player Performance ◽  
Game Performance

Sport-specific skills display diurnal variation across various team sports such as badminton and tennis serving accuracy and soccer dribbling, volleying, and chipping execution. However, the effects of athlete chronotype on in-game sport-specific skill performance according to time of day across team sports is not well understood. Therefore, the aim of this study was to identify the effect of player chronotype on in-game basketball performance during evening games. Professional male basketball players (n = 11) completed a morningness–eveningness questionnaire and were categorized according to chronotype (morning-type: n = 4; neither-type: n = 6; evening-type: n = 1). Box score data from the 2019/20 season were utilized to determine individual in-game performance during evening games played after 18:00 h. Composite metrics (i.e., effective field goal percentage, offensive rating, defensive rating, and player efficiency) were used as indicators of player performance. Non-significant (p ≥ 0.21) differences were evident between M-types and N-types for most performance measures. Small to very large effects were observed in the number of rebounds favoring M-types, and three-point shots attempted and made, assists, and steals favored N-types. In-game performance appeared to not be affected by chronotype (i.e., M-type vs. N-type) in evening games among professional male basketball players. The lack of observed effect between chronotype and in-game performance suggest coaching staff may not need to consider player chronotype when developing a match strategy or assigning player roles if largely dealing with M-types and N-types. However, to ensure the greatest specificity, coaching staff may endeavor to schedule habitual training times in line with that of competition in an effort to align player circadian rhythms to games.

Heart Rate Recovery Changes during Competition Period in High-Level Basketball Players

2018 ◽  
Vol 1 (80) ◽  
Author(s):  
Audrius Gocentas ◽  
Anatoli Landõr ◽  
Aleksandras Kriščiūnas
Keyword(s):  
Heart Rate ◽  
Heart Rate Recovery ◽  
Team Sports ◽  
Basketball Players ◽  
Coeffi Cients ◽  
Competition Period ◽  
Monitoring Training ◽  
Intense Training ◽  
High Level

Research background and hypothesis. Replete schedule of competitions and intense training are features of contemporary team sports. Athletes, especially the most involved ones, may not have enough time to recover. As a consequence, aggregated fatigue can manifest in some undesirable form and affect athlete’s performance and health.Research aim. The aim of this study was to evaluate the changes in heart rate recovery (HRR) and investigate possible relations with sport-specifi c measures of effi cacy in professional basketball players during competition season.Research methods. Eight male high-level basketball players (mean ± SD, body mass, 97.3 ± 11.33 kg; height 2.02 ± 0.067 m, and age 23 ± 3.12 years) were investigated. The same basketball specifi c exercise was replicated several times from September till April during the practice sessions in order to assess the personal trends of HRR. Heart rate monitoring was performed using POLAR TEAM SYSTEM. Investigated athletes were ranked retrospectively according to the total amount of minutes played and the coeffi cients of effi cacy. Research results. There were signifi cant differences in the trends of HRR between the investigated players. The most effective players showed decreasing trends of HRR in all cases of ranking.Discussion and conclusions. Research fi ndings have shown that the quality of heart rate recovery differs between basketball players of the same team and could be associated with sport-specifi c effi cacy and competition playing time.Keywords: adaptation, autonomic control, monitoring training.

LAX-Score

2021 ◽  
Vol 5 (3) ◽  
pp. 1-28
Author(s):  
Woosub Jung ◽  
Amanda Watson ◽  
Scott Kuehn ◽  
Erik Korem ◽  
Ken Koltermann ◽  
...  
Keyword(s):  
Ncaa Division I ◽  
Athletic Performance ◽  
High Performance ◽  
Performance Enhancement ◽  
Ground Truth ◽  
Division I ◽  
Sports Science ◽  
Player Performance ◽  
The Relationship ◽  
Game Performance

For the past several decades, machine learning has played an important role in sports science with regard to player performance and result prediction. However, it is still challenging to quantify team-level game performance because there is no strong ground truth. Thus, a team cannot receive feedback in a standardized way. The aim of this study was twofold. First, we designed a metric called LAX-Score to quantify a collegiate lacrosse team's athletic performance. Next, we explored the relationship between our proposed metric and practice sensing features for performance enhancement. To derive the metric, we utilized feature selection and weighted regression. Then, the proposed metric was statistically validated on over 700 games from the last three seasons of NCAA Division I women's lacrosse. We also explored our biometric sensing dataset obtained from a collegiate team's athletes over the course of a season. We then identified the practice features that are most correlated with high-performance games. Our results indicate that LAX-Score provides insight into athletic performance beyond wins and losses. Moreover, though COVID-19 has stalled implementation, the collegiate team studied applied our feature outcomes to their practices, and the initial results look promising with regard to better performance.

scholarly journals Effects of Cool-Down Exercise and Cold-Water Immersion Ther-apy on Basic Fitness and Sport-Specific Skills among Korean College Soccer Players

2021 ◽  
Author(s):  
Yoon-Hyung Lee ◽  
Jin-Ho Yoon ◽  
Ki-Jae Song ◽  
Jae-Keun Oh
Keyword(s):  
Cold Water ◽  
Water Immersion ◽  
Group Interaction ◽  
Cold Water Immersion ◽  
Soccer Players ◽  
Power Balance ◽  
Balance Test ◽  
Group Interactions ◽  
Skill Performance ◽  
Specific Skill

Background: We aimed to examine the effects of cool-down exercise and cold-water immersion therapy on agility, speed, power, balance, and sport-specific skill performance in college soccer players, and to provide baseline data for the development of effective recovery programs. Methods: In August 2020, 21 male college soccer players in Seoul, Korea, were randomly divided into the following groups: control group (CG, n=7), cool-down exercise group (CDG, n=7), and cool-down exercise plus cold-water immersion group (CDCWG, n=7). Agility, speed, power, balance, and sport-specific skill performance were assessed before and after the intervention. Results: No significant differences in Southeast Missouri (SEMO) Agility Test, 20-m sprint test, vertical jump test, or Y-balance test (right) were observed among the groups; however, there was a significant effect of time (P<0.05) and a significant time × group interaction (P<0.05). Significant effects of time (P<0.001), group (P=0.043), and a time × group interaction (P=0.009) were observed in the Y-balance test (left). There were no between-group differences in the 22-m dribble test, shooting test (left), or shooting test (right); however, there were significant effects of time (P<0.05) and significant time × group interactions (P<0.05). No significant effects of group or time × group interactions were observed for the kicking test (left or right); however, there were significant effects of time (P<0.001). Conclusion: Addition of cold-water immersion therapy to a recovery program including cool-down exercise can promote recovery of basic and sport-specific abilities among college soccer players.

scholarly journals PREVALENCE OF PROBLEM DRINKING AND ALCOHOL RELATED PROBLEMS AMONG TEAM SPORTS PLAYERS

2011 ◽  
Vol 2 (3) ◽  
pp. 24-28
Author(s):  
S A Medvedev ◽  
Yu P Zverev
Keyword(s):  
Alcohol Consumption ◽  
Problem Drinking ◽  
Team Sports ◽  
Alcoholic Beverages ◽  
Basketball Players ◽  
Psychometric Instrument ◽  
Russian Version ◽  
Professional Soccer ◽  
Typical Day ◽  
Alcohol Related Problems

The aim of the present study was to assess the reasons and the pattern of alcohol consumption and the prevalence of alcohol related problems among professional soccer and basketball players. Psychometric instrument included Russian version of "AUDIT". The results demonstrated presence of significant alcoholization of sportsmen, which was reflected in the absence of responders abstaining from alcohol, preference for strong alcoholic beverages, high mean "AUDIT" score (7,4 ± 3,1) and alcohol consumption (401,7 ± 271,2 ml of ethanol per month). About one third of sportsmen consumed alcohol at dangerous level. The typical pattern of alcohol consumption was characterized by frequent intake of alcohol and consumption of 5 and more drinks on a typical day of drinking. About 93% of athletes experienced alcohol related problems.

Their Hands Communicate and Their Eyes Listen: Perceptions of Small Group Messages Amongst Deaf College Basketball Players

2020 ◽  
pp. 216747952091307
Author(s):  
Andrew Dix
Keyword(s):  
Small Group ◽  
American Sign Language ◽  
Focal Point ◽  
Team Sports ◽  
Basketball Players ◽  
Small Group Communication ◽  
College Basketball ◽  
Sports Communication ◽  
Post Test ◽  
Practical Implications

This study concentrated on small group communication amongst Deaf basketball players. The central aim of the current research was to explore how outsiders perceive the communication of Deaf athletes who communicate via American Sign Language (ASL) in the sport of college basketball. Cultural identity theory (CIT) provided a theoretical foundation for the current research, while the extant literature on small groups was discussed to provide insight on intrateam messages. The participants in this study completed a pretest that centered on sports communication, partook in a distraction exercise, were informed they were analyzing Deaf athletes who communicate in ASL, and then completed a post-test that centered on sports communication. One of the main findings was that Deaf basketball players were perceived to share messages of acceptance with one another. Additional results revealed that Deaf basketball players were perceived to resolve conflict in a positive manner and were less likely to engage in negative conflict while communicating with teammates. Implications for CIT were a focal point in the study discussion as were practical implications tied to effective communication in team sports.

scholarly journals Concussions in the National Basketball Association: An Analysis from 1999-2018

2019 ◽  
Vol 7 (7_suppl5) ◽  
pp. 2325967119S0040
Author(s):  
Kelechi Okoroha ◽  
Bhavik H. Patel ◽  
Yining Lu ◽  
Alexander J. Idarraga ◽  
Brian Forsythe
Keyword(s):  
Standardized Testing ◽  
Media Coverage ◽  
Medical Knowledge ◽  
National Basketball Association ◽  
Return To Play ◽  
Before And After ◽  
Education Medical ◽  
Player Performance ◽  
First Time ◽  
Game Performance

Objectives: Several studies have examined the incidence and effects of concussions in professional football, baseball, and hockey, but there has been limited evaluation of the effects of concussions in National Basketball Association (NBA) players. This study aims to evaluate the epidemiologic trends of concussions, as well as the effects of concussions on in-game performance, in NBA players. Methods: Publicly available records were searched to include all players who sustained an in-game concussion while playing in the NBA from the beginning of the 1999 NBA season to the conclusion of the 2018 season. For each player the following variables were collected: date of injury, number of days and games missed before returning to game play, player efficiency rating (PER) in the season of injury, the season preceding the injury, and the season following the injury, position of the injured player, and the incidence of multiple concussions for a single player. Concussion trends before and after the institution of the NBA Concussion Protocol were calculated, as well as the effects on PER after return to play. Results: From the start of the 1999 season to the end of the 2018 season, 185 basketball-related concussions were incurred across 149 NBA players. All players were able to return to play following a first-time concussion after missing an average of 7.7 days and 3.5 games. The NBA Concussion Protocol was instituted ahead of the 2011-2012 season, prior to which there were 5.7 concussions recorded/season, with an average of 6.7 days and 3.0 games missed per first-time concussion. Following the institution of the concussion protocol, there were approximately 11 more concussions recorded/season (16.7 vs. 5.7, P = 0.007), with 1.7 more days missed (8.4 vs. 6.7, P = 0.27) and 0.9 more games missed (3.9 vs. 3.0, P = 0.24) per concussion, compared to prior seasons. Of the 149 players who suffered concussions, 27 were concussed multiple times (18.1%). There was no difference found in the incidence of recurrent concussions within the same season before vs. after the institution of the concussion protocol (4 vs. 5, P > 0.05). PER was almost identical for concussed players in the season prior to the injury, the season in which the injury occurred, and the season following the injury (13.93 vs. 13.94 vs. 13.91, P = 0.998). Conclusion: There has been a significant increase in the incidence of concussions in the NBA player following the institution of a league-wide concussion protocol. This likely reflects more accurate reporting secondary to advances in player education, medical knowledge, national media coverage, and standardized testing protocols. Despite this increase in reported concussions, the amount of time missed following injury has remained relatively constant. Player performance as reported by PER was not significantly affected by sustaining a concussion. [Figure: see text][Table: see text]

The Effects of an Imagery Rehearsal, Relaxation, and Self-Talk Package on Basketball Game Performance

1990 ◽  
Vol 12 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Gail Kendall ◽  
Dennis Hrycaiko ◽  
Garry L. Martin ◽  
Tom Kendall
Keyword(s):  
Social Validity ◽  
Multiple Baseline ◽  
Single Subject ◽  
Intervention Package ◽  
Basketball Players ◽  
Basketball Game ◽  
Self Talk ◽  
Validity Measures ◽  
Game Performance ◽  
Imagery Rehearsal

This study investigated the effects of an imagery rehearsal, relaxation, and self-talk package on the performance of a specific defensive basketball skill during competition. Subjects were four female intercollegiate basketball players. A single-subject multiple-baseline-across-individuals design was employed to evaluate the intervention package. The intervention was clearly effective in enhancing a basketball skill during games, and social validity measures were very positive. The need for further research in this area is discussed.

scholarly journals Epidemiology and Impact on Performance of Lower Extremity Stress Injuries in Professional Basketball Players

2017 ◽  
Vol 10 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Moin Khan ◽  
Kim Madden ◽  
M. Tyrrell Burrus ◽  
Joseph P. Rogowski ◽  
Jeff Stotts ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Performance Metrics ◽  
Surgical Intervention ◽  
Return To Play ◽  
Basketball Players ◽  
Professional Basketball ◽  
Stress Injuries ◽  
Improved Performance ◽  
And Performance ◽  
Player Performance

Background: Professional basketball players in the National Basketball Association (NBA) subject their lower extremities to significant repetitive loading during both regular-season and off-season training. Little is known about the incidence of lower extremity bony stress injuries and their impact on return to play and performance in these athletes. Hypothesis: Stress injuries of the lower extremity will have significant impact on performance. Study Design: Case series. Level of Evidence: Level 4. Methods: All bony stress injuries from 2005 to 2015 were identified from the NBA. Number of games missed due to injury and performance statistics were collected from 2 years prior to injury to 2 years after the injury. A linear regression analysis was performed to determine the impact of injury for players who returned to sport. Results: A total of 76 lower extremity bony stress injuries involving 75 NBA players (mean age, 25.4 ± 4.1 years) were identified. Fifty-five percent (42/76) involved the foot, and most injuries occurred during the regular season (82.9%, 63/76), with half occurring within the first 6 weeks. Among players who sustained a fifth metatarsal stress fracture, 42.9% were unable to return to professional play. Players who sustained stress injuries had reduced play performance, specifically related to number of games played ( P = 0.014) and number of steals per game ( P = 0.004). Players who had surgery had significantly better performance at 2 years than those who were managed nonoperatively, independent of the type of injury (β = 4.561; 95% CI, 1.255-7.868). Conclusion: Lower extremity bony stress injuries may significantly affect both short- and long-term player performance and career length. Stress injuries result in decreased player performance, and surgical intervention results in improved performance metrics compared with those treated using conservative methods. Clinical Relevance: Stress injuries result in decreased player performance, and surgical intervention results in improved performance metrics.

scholarly journals The Association Between Facial Width-to-Height Ratio (fWHR) and Sporting Performances: Evidence From Professional Basketball Players in Japan

2021 ◽  
Vol 12 ◽  
Author(s):  
Shintaro Sato ◽  
Keita Kinoshita ◽  
Koichi Sekino ◽  
Haruka Amano ◽  
Yoshifumi Bizen ◽  
...  
Keyword(s):  
Potential Role ◽  
Effect Sizes ◽  
Performance Rating ◽  
Height Ratio ◽  
Real World Data ◽  
Basketball Players ◽  
Professional Basketball ◽  
Behavioral Tendencies ◽  
Player Performance

Previous research in evolutionary psychology has highlighted the potential role of facial structures in explaining human behavior. The facial width-to-height ratio (fWHR) was found to be associated with testosterone-driven behavioral tendencies like achievement drive, aggression, and sporting success. The current study aimed to replicate such relationships using real-world data (i.e., professional basketball players; N = 482). Achievement drive, aggression, and sporting success were operationalized as field-goal attempts (FGA), the number of fouls committed (Foul), and player performance rating (EFF), respectively. The results indicated that fWHR was significantly associated with FGA and EFF, controlling for minutes of play and body-mass-index. The same results were obtained for separate analyses focusing on outsider players. However, analyses of inside players demonstrated that fWHR was associated only with EFF. The current research further provides empirical evidence supporting the effects of fWHR on achievement drive and sporting successes, although the effect sizes are notably small.

scholarly journals Evaluation of Wheelchair Basketball Skill Performance of Wheelchair Basketball Players in Different Game Positions

2018 ◽  
Vol 4 (75) ◽  
Author(s):  
Kęstutis Skučas ◽  
Stanislovas Stonkus ◽  
Bartosz Molik ◽  
Vytautas Skučas
Keyword(s):  
Social Interaction ◽  
Wheelchair Basketball ◽  
Basketball Players ◽  
Skill Performance ◽  
Center Position ◽  
Physical Abilities ◽  
Playing Time ◽  
Social Interaction Skills ◽  
Better Than

In wheelchair basketball the evaluation of the quality of disabled players’ movement, motion and action variety, sensomotoric, intelectual, social interaction skills, coordinative and physical abilities besides the natural tests (Brasile, 1986), quantitative and qualitative play results (technical actions carried out by a player during a game and during a minute of a game) are considered to be objective and informative. The aim of the research was to state and evaluate the playing skills of wheelchair basketball players in different game positions (a playmaker, a forward, a center) in official competitions. The play of 32 baketball players was under research. Aiming to analyse playing results of wheelchair basketball players in different game positions 20 games were video recorded by camera ”Panasonic NV-GS27“. The following actions of the players (playmakers, forwards, centers) with different functions in the team were recorded: playing time, passing, dribbling, shooting and its efficiency, rebounding and other important technical actions characterizing the activity of the players during the game. The integral preparation, ability to play, the playing quality were evaluated according to the methods of D. Byrnes and B. Hendrick (1994), giving high or low marks for each action. Results showed that centers were the most active ones, carrying out on average 2.5 actions per minute (forwards — 2.1, playmakers — 1.2), shooting 16 times per game (forwards — 7.7, playmakers — 5). The most universal players were also the centers, their passing and dribbling actions making up 25%, shooting actions — 20% of all the movements. The most accurate main technical actions were carried out by the centers: their shooting accuracy was 36% (that of wing players and playmakers being 30%). Centers’ integral qualification and playing skills (according to the methods used) were the highest rated + 42 points. Quantitative and qualitative playing results and the results of integral preparation of wheelchair basketball players in center position were significantly better than those of the playmakers and forwards.Keywords: wheelchair basketball, quantitative and qualitative playing results, integral qualification, player’s game positions.

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