Athletes' Social Identities: Their Influence on Precompetitive Group-Based Emotions.

This research studied the influence of multiple social identities on the emotions that athletes felt toward their teammates/partners and opponents. Athletes (N = 714) from individual and team-based sports reported their identification both as athletes of the sport and as athletes of their club before reporting their precompetitive emotions. The results showed that these multiple social identities influenced precompetitive emotions toward different targets, with higher levels of sport identification associated with increased positive and decreased negative emotions toward opponents and higher levels of club identification associated with increased positive and decreased negative emotions toward teammates/partners, although increased club identification was also associated with more positive emotions toward opponents. These findings extend intergroup emotions theory by showing its suitability and applicability to face-to-face task-oriented teams in sport. Particularly, they highlight the importance of investigating the simultaneous level of multiple social identities, rather than only a dichotomic self-categorization, on group-based emotions experienced toward multiple targets.

Reliability of EMG normalisation methods for upper-limb muscles.

The study investigated different electromyographic (EMG) normalisation methods for upper-limb muscles. This assessment aimed at comparing the EMG amplitude and the reliability of EMG values obtained with each method. Eighteen male tennis players completed isometric maximal voluntary contractions and dynamic strength exercises (push-ups and chin-ups) on three separate test sessions over at least 7 days. Surface EMG activity of nine upper body muscles was recorded. For each muscle, an analysis of variance for repeated measures was used to compare maximal EMG amplitudes between test conditions. The intra-class correlation coefficient, the coefficient of variation and the standard error of measurement were calculated to determine the EMG reliability of each condition. On the basis of a compromise between maximal EMG amplitude and high reliability, the chin-ups appeared to be the optimal normalisation method for M. latissimus dorsi, M. posterior deltoid, M. biceps brachii, M. flexor carpi radialis and M. extensor carpi radialis. The push-ups seemed relevant to normalise M. anterior deltoid and M. triceps brachii activity, while isometric maximal voluntary contraction remained the most appropriate method for M. pectoralis major and M. middle deltoid. Thus, original methods are proposed to normalise EMG signal of upper-limb muscles.

Modelling response time in a mental rotation task by gender, physical activity, and task features.

Mental rotation (MR) is a spatial skill considered to be a key-component of intellectual ability. Studies have suggested that the response time (RT) in a MR task (MRt) might be influenced, with possible gender differences, by the practice of a physical activity (PA) and depending on the plane, direction, degrees of the MR and the frame of reference to perform it. The present study aimed at examining the respective influences of all these variables on the RT by developing a linear mixed-effect model from the RTs varying according to the MR plane, direction, degrees and frame of reference. The MRt was performed by 96 males and females, all undergraduate students, distributed in three groups (sedentary subjects, artistic gymnasts, and futsal players). The results showed that only gender had a main effect (faster log RT in males), probably task-dependent. The other variables interacted among them showing that: (a) the log RT may be influenced by rotations experienced during PA, in particular during the locomotion on a horizontal ground and (b) such influence mainly depends on the compatibility of the physical rotations experienced with the plane and the degrees of the MRt.

Motor imagery effectiveness for mirror reversed movements.

Physical practice is known to enhance motor adaptation skills, which refer to the individual ability to compensate for environmental changes. So far, it is still unknown whether a similar effect can be observed following motor imagery (MI). Thirty-nine participants were tested during a joystick tracking task under both normal and mirror conditions (i.e., the inductive direction of the joystick was reversed), before and after a physical practice or MI training phase. Eye movements and electromyographic activity were recorded during MI. Motor performance was also evaluated after a 6 h interval during daytime. As compared to the control group, the results revealed that both MI and physical practice improved motor performance in the mirror condition, during the post-training test. Furthermore, the time to complete the task was further reduced after 6 hours, both in the normal and mirror conditions. These results demonstrate the effectiveness of MI for learning mirror-reversed movements, and for the consolidation process that follows motor adaptation.

Effect of Mental Calculation and Number Comparison on a Manual-Pointing Movement.

The present study aimed at examining the effect of mental calculation and number comparison on motor performance measured as the movement time of a fast manual-pointing movement. Three experiments, involving a total number of 65 undergraduate subjects, examined the effect of mental subtraction (complex) and, respectively, of (a) mental addition (simple or complex), (b) mental multiplication (simple or complex), and (c) the comparison of dot sets and number comparison. Each number was written in Arabic. The movement times were analyzed by using a multilevel linear mixed-effect model. The results showed significant improvement of manual-pointing movement performance only after the complex calculations and after number comparison. Possible implication of attentional mechanisms specific to this arithmetical activity is further discussed.

Relationship between muscle coordination and racket mass during forehand drive in tennis.

This study aimed at investigating the relationship between the trunk and upper limb muscle coordination and mass of the tennis racket during forehand drive. A total of 15 male tennis players performed seven series of ten crosscourt forehand drives, both with their personal racket and six rackets with increased mass ranging from 6 to 16% (step = 2%) of their personal racket mass. The electromyographic (EMG) activity was recorded from nine trunk and upper limb muscles. The onset before impact and EMGrms values of the bursts were individually calculated. Results showed that the ball speed and the muscle activation temporal sequences were similar, whatever the increase in racket mass. Interestingly, in all participants, the activation level of the pectoralis major, latissimus dorsi and biceps brachii decreased when the racket mass increased, while the variations in the anterior deltoid activation level were correlated to the individual personal racket mass. These findings strongly suggest that the study of muscle activity during tennis practice should be considered as a complementary technique to determine a better adequacy of the racket characteristics to those of the player.

Emotions and performance in rugby.

PURPOSE: This study investigated emotion-performance relationships in rugby union. We identified which emotions rugby players experienced and the extent to which these emotions were associated with performance, considering how emotions unfold over the course of a game, and whether the game was played at home or away. METHODS: Data were gathered from 22 professional male rugby union players using auto-confrontation interviews to help identify situations within games when players experienced intense emotions. We assessed the intensity of emotions experienced before each discrete performance and therefore could assess the emotion-performance relationship within a competition. RESULTS: Players identified experiencing intense emotions at 189 time-points. Experts in rugby union rated the quality of each performance at these 189 time-points on a visual analog scale. A Linear Mixed Effects model to investigate emotion-performance relationships found additive effects of game location, game time, and emotions on individual performance. CONCLUSION: Results showed 7 different pre-performance emotions, with high anxiety and anger associating with poor performance. Future research should continue to investigate emotion-performance relationships during performance using video-assisted recall and use a measure of performance that has face validity for players and coaches alike.

Group-Based Emotions: Evidence for Emotion-Performance Relationships in Team Sports.

PURPOSE: In team sports, players have to manage personal interests and group goals, emphasizing intricacies between personal and social identities. The focus of this article was to examine the effect of identity mechanisms on appraisal processes, based on the following research question: Does the level of self-abstraction (low [personal identity] versus high [social identity]) lead to group-based emotions and influence performances? METHOD: An experimental design was used in which the level of self-abstraction was manipulated through the induction of a self- versus a team-oriented goal. Thirty elite male rugby players (Mage = 19.06, SD = 0.78, randomly split) participated in a match reproducing conditions similar to those of official games. Individual and perceived team-level emotions and performance were measured 17 times during the match. RESULTS: Linear Mixed Effects models showed that a high level of self-abstraction: (a) led to more positive and less negative individual (variances explained: 52% and 46%) and perceived team-referent (variances explained: 57% and 40%) emotions; (b) reduced the correlation of team-referent emotions with individual ones; and (c) positively influenced team and individual performances (variances explained: 50% and 19%). Moreover, after controlling for potential effects of the level of self-abstraction, only positive team-referent emotions influenced performance. CONCLUSIONS: This study is the first to experimentally manipulate athletes' social identity to examine group-based emotions in sport. Challenging the usual intrapersonal approaches, these findings suggested that social identity and its association with team-referent emotions could be one of the key dimensions of emotion-performance relationships in team sports.

[Adapted physical activity and patient education in the French diabetes networks]. / Activité physique adaptée et éducation du patient dans les Réseaux Diabète français.

A thorough questionnaire-based survey of French diabetes networks depicts an accurate description of the services they offer, in particular concerning physical activity. Often considered as less important than medicinal monitoring and dietetics, physical activity is at the core of a new professional dynamic. Practical sessions of adapted physical activity are presently offered in half the networks, as either one-time awareness-raising sessions or a complete series of sessions. Sports medicine educators seem to constitute an emerging professional group within a framework which aims to complement information provided to patients by skills-building through group sessions. Two distinct perspectives emerge as being linked to intervention methods: the first one aims to educate about physical activity, while the second aims to educate through physical activity.

Disciplinarity and sport science in Europe: A statistical and sociological study of ECSS conference abstracts.

Abstracts of European College of Sports Science conferences (1995-2014) are studied. The number of abstracts has been increasing regularly (+90 per year). This rise is in recent years largely due to extra-European countries. The magnitude and accumulation of the different topics of discussion are examined. An operational criterion determines four stages of evolution of a topic: social network, cluster, specialty, and discipline. The scientific production can, therefore, be classified as disciplinary or non-disciplinary. The disciplinary part is more important but has been less dynamic recently. The cognitive content of sport science is then explored through a multidimensional scaling of the topics based on the keywords used in the abstracts. Three areas are visible: social sciences and humanities, sports medicine and physiology, and biomechanics and neurophysiology. According to the field theory of Bourdieu ( 1975 ), three scientific habitus are distinguished. The logic of academic disciplinary excellence is the consequence of the autonomy of this scientific field, its closure, peer-review process, and barriers to entry. The distribution of scientific capital and professional capital is unequal across the three areas. Basically, conservation strategies of academic disciplinary excellence are predicted in biomechanics and neurophysiology, subversion strategies of interdisciplinarity based on professional concerns can appear in the sports medicine and physiology area, and critical strategies of interdisciplinarity based on social utility in social sciences and humanities. Moreover, additional tensions within these areas are depicted. Lastly methods based on co-citations of disciplines and boundary objects are proposed to find tangible patterns of multidisciplinarity confirming these strategies.

Effects of Age and Task Load on Drivers' Response Accuracy and Reaction Time When Responding to Traffic Lights.

Due to population aging, elderly drivers represent an increasing proportion of car drivers. Yet, how aging alters sensorimotor functions and impacts driving safety remains poorly understood. This paper aimed at assessing to which extent elderly drivers are sensitive to various task loads and how this affects the reaction time (RT) in a driving context. Old and middle-aged people completed RT tasks which reproduced cognitive demands encountered while driving. Participants had to detect and respond to traffic lights or traffic light arrows as quickly as possible, under three experimental conditions of incremental difficulty. In both groups, we hypothesized that decision-making would be impacted by the number of cues to be processed. The first test was a simple measure of RT. The second and third tests were choice RT tasks requiring the processing of 3 and 5 cues, respectively. Responses were collected within a 2 s time-window. Otherwise, the trial was considered a no-response. In both groups, the data revealed that RT, error rate (incorrect answers), and no-response rate increased along with task difficulty. However, the middle-aged group outperformed the elderly group. The RT difference between the two groups increased drastically along with task difficulty. In the third test, the rate of no-response suggested that elderly drivers needed more than 2 s to process complex information and respond accurately. Both prolonged RT and increased no-response rate, especially for difficult tasks, might attest an impairment of cognitive abilities in relation to aging. Accordingly, casual driving conditions for young drivers may be particularly complex and stressful for elderly people who should thus be informed about the effects of normal aging upon driving.

Relations between female students' personality traits and reported handicaps to rhythmic gymnastics performance.

The present study evaluated the relative contributions of Self-esteem, Trait anxiety, and Public Self-consciousness to self-handicapping on a sex-typed task, within a specific academic sport context. Prior to the competitive examination used to recruit French Physical Education Teachers, female sport students (N = 74) were asked to list and rate on a 7-point scale handicaps which could be disruptive to their Rhythmic Gymnastics performance. Self-esteem did not account for significant variance in any category of handicaps. Trait Anxiety was negatively related to handicaps related to Rhythmic Gymnastics and to Social and Work Commitments. Public Self-consciousness was significantly related to endorsement of Friends and Family Commitments handicaps. These results were discussed in relation to the literature.

Selective influence of circadian modulation and task characteristics on motor imagery time.

In this study, we examined the effect of circadian modulation on motor imagery (MI) time while also considering the effects of task complexity and duration. The ability to imagine in real time was influenced by circadian modulation in a simple walking condition, with longer MI times in the morning and evening sessions. By contrast, there was no effect of circadian rhythm in the complex, short or long walking conditions. We concluded that motor imagery time is modulated during the course of the day, but the effect of task difficulty is stronger than circadian modulation in altering the temporal congruence between physical practice and MI performance. Practical applications in motor learning and rehabilitation are discussed.

Differences in motor imagery time when predicting task duration in alpine skiers and equestrian riders.

Athletes' ability to use motor imagery (MI) to predict the speed at which they could perform a motor sequence has received little attention. In this study, 21 alpine skiers and 16 equestrian riders performed MI based on a prediction of actual performance time (a) after the course inspection, (b) before the start, and (c) after the actual performance. MI and physical times were similar in expert skiers during each imagery session, while novice skiers and novice and expert riders underestimated the actual course duration. These findings provide evidence that the temporal accuracy of an imagery task prediction depends on the performer's expertise level and characteristics of the motor skill.

Relationship between muscle coordination and forehand drive velocity in tennis.

This study aimed at investigating the relationship between trunk and upper limb muscle coordination and stroke velocity during tennis forehand drive. The electromyographic (EMG) activity of ten trunk and dominant upper limb muscles was recorded in 21 male tennis players while performing five series of ten crosscourt forehand drives. The forehand drive velocity ranged from 60% to 100% of individual maximal velocity. The onset, offset and activation level were calculated for each muscle and each player. The analysis of muscle activation order showed no modification in the recruitment pattern regardless of the velocity. However, the increased velocity resulted in earlier activation of the erector spinae, latissimus dorsi and triceps brachii muscles, as well as later deactivation of the erector spinae, biceps brachii and flexor carpi radialis muscles. Finally, a higher level of activation was observed with the velocity increase in the external oblique, latissimus dorsi, middle deltoid, biceps brachii and triceps brachii. These results might bring new knowledge for strength and tennis coaches to improve resistance training protocols in a performance and prophylactic perspective.

Relationship between spatial abilities, mental rotation and functional anatomy learning.

This study investigated the relationship between visuo-spatial representation, mental rotation (MR) and functional anatomy examination results. A total of 184 students completed the Group Embedded Figures Test (GEFT), Mental Rotation Test (MRT) and Gordon Test of Visual Imagery Control. The time spent on personal assignment was also considered. Men were found to score better than women on both GEFT and MRT, but the gender effect was limited to the interaction with MRT ability in the anatomy learning process. Significant correlations were found between visuo-spatial, MR abilities, and anatomy examination results. Data resulting from the best students' analyzes underscore the effect of high MR ability which may be considered reliable predictor of success in learning anatomy. The use of specific tests during learning sessions may facilitate the acquisition of anatomical knowledge.

Assessing workload through physiological measurements in bus drivers using an automated system during docking.

The aim of the experiment was to test the effect of an automated system of bus docking on drivers' mental workload. Reduced workload is thought to be brought about by helping the driver to maneuver, as he or she is required only to monitor proper functioning of the system. However, the true impact of the system on drivers must be studied to guarantee good acceptance and minimal distraction from traffic. Workload was estimated by electrodermal activity recording while drivers tested 5 scenarios involving (or not involving) the docking system. Results showed that docking precision was improved when the system was used. When drivers monitored the functioning of the system, their workload was higher than that observed during manual docking; however, reduced workload was evidenced after a learning process. The docking system was also shown to increase workload in the event of dysfunction, especially when drivers had to take over control. Despite this particular situation, and after habituation, such a system could be integrated into buses to improve safety during boarding and egress.