scholarly journals Team sport players individual acceleration-speed profile in-situ: a proof of concept in professional football

2020 ◽  
Author(s):  
Jean-Benoit Morin ◽  
Yann Le Mat ◽  
Cristian Osgnach ◽  
Alessandro Pilati ◽  
Pierre Samozino ◽  
...  
Keyword(s):  
Performance Management ◽  
Team Sports ◽  
Return To Sport ◽  
Team Sport ◽  
Football Players ◽  
Proof Of Concept ◽  
Good Reliability ◽  
Force Velocity ◽  
The Individual

Assessing football players’ sprint mechanical outputs is key to the performance management process (e.g. talent identification, training, monitoring, return-to-sport). This is possible using linear sprint testing to derive force-velocity-power outputs (in laboratory or field settings), but (i) testing requires specific efforts and (ii) the movement assessed is not specific to the football playing tasks. This proof-of-concept short communication presents a method to derive the players’ individual acceleration-speed (AS) profile in-situ, i.e. from global positioning system data collected over several football sessions (without running specific tests). Briefly, raw speed data collected in 16 professional male football players over several training sessions were plotted, and for each 0.2 m/s increment in speed from 3 m/s up to the individual top-speed reached, maximal acceleration output was retained to generate a linear AS profile. Results showed highly linear AS profiles for all players (all R2>0.984) which allowed to extrapolate the theoretical maximal speed and accelerations as the individual’s sprint maximal capacities. Good reliability was observed between AS profiles determined 2 weeks apart for the players tested, and further research should focus on deepening our understanding of these methodological features. Despite the need for further explorations (e.g. comparison with conceptually close force-velocity assessments that require, isolated and not football-specific linear sprint tests), this in-situ approach is promising and allows direct assessment of team sport players within their specific acceleration-speed tasks. This opens several perspectives in the performance and injury prevention fields, in football and other team sports, and the possibility to “test players without testing them”.

scholarly journals Examination of Cognitive Flexibility Levels of Young Individual and Team Sport Athletes

2018 ◽  
Vol 6 (8) ◽  
pp. 149 ◽  
Author(s):  
Şehmus Aslan
Keyword(s):  
High School Students ◽  
Cognitive Flexibility ◽  
Female Athletes ◽  
Team Sports ◽  
Team Sport ◽  
Study Data ◽  
Validity And Reliability ◽  
School Students ◽  
The Individual ◽  
Individual Sports

The purpose of this study was to compare the level of cognitive flexibility of individual and team athletes who are students. The study included a total of 237 volunteer athletes, comprising 140 males (59.1%) and 97 females (40.9%) with a mean age of 18.98 ± 2.18 years (range, 16-26 years) who were licensed to participate in individual and team sports. Study data were collected using the Cognitive Flexibility Scale developed by Martin and Rubin (1995), which consists of 12 items in total. International validity and reliability studies were conducted by Martin and Rubin, and Turkish validity and reliability studies were conducted by Çelikkaleli on high school students (Çelikkaleli, 2014). The scores of the Cognitive Flexibility Scale were found to be higher in the team sports athletes compared with the individual sports athletes (p<0.05). No difference was determined between the levels of cognitive flexibility in male and female athletes. The results indicated that the cognitive flexibility levels of team athletes are higher than those of individual athletes.

As Iron Sharpens Iron? Athletes’ Perspectives of Positional Competition

2016 ◽  
Vol 30 (1) ◽  
pp. 55-67 ◽  
Author(s):  
Sebastian Harenberg ◽  
Harold A. Riemer ◽  
Erwin Karreman ◽  
Kim Dorsch
Keyword(s):  
Group Process ◽  
Team Sports ◽  
Team Sport ◽  
Future Research ◽  
Related Information ◽  
Semistructured Interviews ◽  
Playing Time ◽  
The Individual

The study explored the competition between teammates for playing time (i.e., positional competition) within university team sports from the athletes’ perspective. Sixteen Canadian interuniversity team sport athletes (11 women, 5 men) participated in semistructured interviews. Results revealed that positional competition (a) occurs between players in the same position, (b) is necessary to determine playing time, (c) is an ongoing, omni-present process, and (d) happens under the awareness of the coach. Furthermore, various inputs (by the individual athlete, team, coach), processes (performance-related, information-related), and outcomes (individual, collective) became apparent. Positional competition is a group process that occurs across multiple competitive situations (e.g., practices, games). Future research is needed to clearly define and operationalize it as its own construct.

Individual acceleration-speed profile in-situ: a proof of concept in professional football players

2021 ◽  
pp. 110524
Author(s):  
Jean-Benoit Morin ◽  
Yann Le Mat ◽  
Cristian Osgnach ◽  
Andrea Barnabò ◽  
Alessandro Pilati ◽  
...  
Keyword(s):  
Football Players ◽  
Professional Football ◽  
Speed Profile ◽  
Proof Of Concept

scholarly journals COMPARATIVE ANALYSIS OF COMPETITIVE STATE ANXIETY AMONG TEAM SPORT AND INDIVIDUAL SPORT ATHLETES IN IRAN

2016 ◽  
Vol 20 (5) ◽  
pp. 57-61 ◽  
Author(s):  
Soltani Hossein ◽  
Hojati Zahra ◽  
Reza Attarzadeh Hossini Seyed
Keyword(s):  
State Anxiety ◽  
Team Sports ◽  
Team Sport ◽  
Male Athletes ◽  
Persian Version ◽  
Cognitive Anxiety ◽  
The Mean ◽  
The Individual ◽  
Individual Sports ◽  
One Way Anova

Purpose: With respect to the fact that every sport field has its own special nature, the aim of present study was to compare competitive state anxiety among team sport and individual sport athletes in Iran. Material: The statistic sample included 120 male athletes, 60 athletes in individual sports (wrestling, taekwondo and karate) and 60 athletes in team sports (futsal, volleyball and basketball). The research instrument employed was the Persian version of the Competitive State Anxiety Inventory-2. This inventory was distributed among the subjects about 30 minutes before the first competition. Finally by one-way ANOVA data was analyzed. Results: The results indicated that the mean score of somatic anxiety and cognitive anxiety among individual sport athletes was significantly higher than that of team sport athletes (p0.05). Conclusion: It seems the being part of a team alleviates some of the pressure experienced by those who compete alone. It seems the individual sport athletes may be more exposed to evaluation and more engaged in their own skills and abilities than team sport athletes given that responsibility for performance is not distributed across several performers.

scholarly journals Estimation of the force–velocity properties of individual muscles from measurement of the combined plantarflexor properties

2020 ◽  
Vol 223 (18) ◽  
pp. jeb219980
Author(s):  
Mehrdad Javidi ◽  
Craig P. McGowan ◽  
David C. Lin
Keyword(s):  
Muscle Length ◽  
Muscle Architecture ◽  
Muscle Group ◽  
Cross Sectional ◽  
Fiber Properties ◽  
Group Modeling ◽  
Force Velocity ◽  
The Individual

ABSTRACTThe force–velocity (F–V) properties of isolated muscles or muscle fibers have been well studied in humans and other animals. However, determining properties of individual muscles in vivo remains a challenge because muscles usually function within a synergistic group. Modeling has been used to estimate the properties of an individual muscle from the experimental measurement of the muscle group properties. While this approach can be valuable, the models and the associated predictions are difficult to validate. In this study, we measured the in situ F–V properties of the maximally activated kangaroo rat plantarflexor group and used two different assumptions and associated models to estimate the properties of the individual plantarflexors. The first model (Mdl1) assumed that the percent contributions of individual muscles to group force and power were based upon the muscles' cross-sectional area and were constant across the different isotonic loads applied to the muscle group. The second model (Mdl2) assumed that the F–V properties of the fibers within each muscle were identical, but because of differences in muscle architecture, the muscles' contributions to the group properties changed with isotonic load. We compared the two model predictions with independent estimates of the muscles' contributions based upon sonomicrometry measurements of muscle length. We found that predictions from Mdl2 were not significantly different from sonomicrometry-based estimates while those from Mdl1 were significantly different. The results of this study show that incorporating appropriate fiber properties and muscle architecture is necessary to parse the individual muscles' contributions to the group F–V properties.

scholarly journals Comparison of maximal aerobic speeds of team-sport athletes and investigation of optimal training loads*

2021 ◽  
Author(s):  
Abdullah Çetindemir
Keyword(s):  
Heart Rate ◽  
Positive Relationship ◽  
Training Programs ◽  
Team Sports ◽  
Team Sport ◽  
Football Players ◽  
Significant Difference ◽  
Maximal Aerobic Speed ◽  
Run Test ◽  
Shuttle Run

Abstract Objective: To investigate maximal aerobic speed (MAS), participants of team sports in terms of certain variables and to determine relationship team sports.Design: Screening research.Setting: Elite soccer, basketball and handball players.Participants: 44 athletes.Main Outcome Measures: 20-meter shuttle run test (20MSRT) was used.Results: There was a positive relationship between age, VO2max and speed scores (p < 0.05). Besides, significant difference between VO2max, distance and speed also VO2max, distance and speed were found to be significantly different according to types of sports (p < 0.05). When distance and speed scores of athletes were examined, it was determined that mean scores of football players were higher compared to basketball and handball. Heart rate and MAS scores of participants were not significantly different according to type of sport played.Conclusions: This study will contribute to strength and strength coaches, trainers and physiotherapists in terms of training programs that they will apply to athletes of various sports.

scholarly journals Influence of Traditional Sporting Games on the Development of Creative Skills in Team Sports. The Case of Football

2020 ◽  
Vol 11 ◽  
Author(s):  
Alexandre Oboeuf ◽  
Sylvain Hanneton ◽  
Joséphine Buffet ◽  
Corinne Fantoni ◽  
Lazhar Labiadh
Keyword(s):  
Training Session ◽  
Team Sports ◽  
Team Sport ◽  
Control Group ◽  
Football Players ◽  
Fundamental Issue ◽  
Football Clubs ◽  
Post Test ◽  
The One ◽  
Social Uncertainty

The aim of this present study is to investigate the influence of three learning contexts on the development of motor creativity of young footballers (8–9 years old). In team sport, creativity is a fundamental issue because it allows players to adapt in an environment of high social uncertainty. To carry out this work, we suggest a method for assessing motor creativity into ecological situations based on the analysis of praxical communications. Creativity originates from an interaction between divergence and convergence. In our case, the number of communications (fluidity) and the diversity of updated communications (flexibility) are our divergence indicators. Convergence, understood as the ability to make good decisions, is assessed by two expert judges (R &gt; 0.90). Sixty boys’ football players (M = 8.67; SD = 0.3) coming from three football clubs participated in this research. The study lasted 2 years. Each year, a team of 10 players from each club participated in the research twice a week for 32 weeks (8 months), these groups attended different training sessions: (a) the control group (n = 20) followed a classical learning; (b) the decoding group (n = 20) attended training focused on learning the praxemes of football; (c) the traditional sporting games group (n = 20) followed a training session that was jointly focused on praxemes and the practice of traditional sporting games. The motor creativity of players and groups was assessed both at the beginning and at the end of the year during football matches. Compared to the control group, in the post-test, the group with the highest fluidity is the decoding group (p &lt; 0.001) and the one with the highest fluidity is the traditional sporting games group. The latter group is also the one with the best convergence (p &lt; 0.001). The results showed that traditional games can help develop players’ creative abilities. This research invites us to investigate the complementarity between the different offered training.

A novel clinical applicable bed-side tool for assessing conditioning pain modulation: proof-of-concept

2020 ◽  
Vol 20 (4) ◽  
pp. 801-807
Author(s):  
Lars Arendt-Nielsen ◽  
Jesper Bie Larsen ◽  
Stine Rasmussen ◽  
Malene Krogh ◽  
Laura Borg ◽  
...  
Keyword(s):  
Pain Modulation ◽  
Clinical Settings ◽  
Proof Of Concept ◽  
Finger Nail ◽  
Tonic Stimulus ◽  
Pressure Pain Thresholds ◽  
Custom Made ◽  
The Individual ◽  
Descending Pain Modulation ◽  
Finger Pressure

AbstractBackground and aimsIn recent years, focus on assessing descending pain modulation or conditioning pain modulation (CPM) has emerged in patients with chronic pain. This requires reliable and simple to use bed-side tools to be applied in the clinic. The aim of the present pilot study was to develop and provide proof-of-concept of a simple clinically applicable bed-side tool for assessing CPM.MethodsA group of 26 healthy volunteers participated in the experiment. Pressure pain thresholds (PPT) were assessed as test stimuli from the lower leg before, during and 5 min after delivering the conditioning tonic painful pressure stimulation. The tonic stimulus was delivered for 2 min by a custom-made spring-loaded finger pressure device applying a fixed pressure (2.2 kg) to the index finger nail. The pain intensity provoked by the tonic stimulus was continuously recorded on a 0–10 cm Visual Analog Scale (VAS).ResultsThe median tonic pain stimulus intensity was 6.7 cm (interquartile range: 4.6–8.4 cm) on the 10 cm VAS. The mean PPT increased significantly (P = 0.034) by 55 ± 126 kPa from 518 ± 173 kPa before to 573 ± 228 kPa during conditioning stimulation. When analyzing the individual CPM responses (increases in PPT), a distribution of positive and negative CPM responders was observed with 69% of the individuals classified as positive CPM responders (increased PPTs = anti-nociceptive) and the rest as negative CPM responders (no or decreased PPTs = Pro-nociceptive). This particular responder distribution explains the large variation in the averaged CPM responses observed in many CPM studies. The strongest positive CPM response was an increase of 418 kPa and the strongest negative CPM response was a decrease of 140 kPa.ConclusionsThe present newly developed conditioning pain stimulator provides a simple, applicable tool for routine CPM assessment in clinical practice. Further, reporting averaged CPM effects should be replaced by categorizing volunteers/patients into anti-nociceptive and pro-nociceptive CPM groups.ImplicationsThe finger pressure device provided moderate-to-high pain intensities and was useful for inducing conditioning stimuli. Therefore, the finger pressure device could be a useful bed-side method for measuring CPM in clinical settings with limited time available. Future bed-side studies involving patient populations are warranted to determine the usefulness of the method.

Peer Effects on Individual Performance in a Team Sport

2021 ◽  
pp. 152700252110003
Author(s):  
Mariia Molodchik ◽  
Sofiia Paklina ◽  
Petr Parshakov
Keyword(s):  
Video Game ◽  
Peer Effects ◽  
Team Sport ◽  
Individual Performance ◽  
Team Cohesion ◽  
Soccer Players ◽  
Marginal Benefit ◽  
The Individual

The paper investigates the variety of peer effects on individual performance in a team sport. The individual performance of more than 5,000 soccer players, from 234 teams, between 2010 and 2015, is measured with the help of the FIFA video game simulator developed by EA Sports. The study reveals positive peer effects on individual performance although the marginal benefit decreases. Additionally, team cohesion contributes to an improvement of players’ ranking.

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