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Perceived stress in Italian coaches and sport mental health were investigated during the rebooting of sport activities following the first COVID-19 lockdown period. A sample of 237 coaches from various sports were asked to answer the Italian version of the Perceived Stress Scale and the Sport Mental Health Continuum, together with reporting of demographic information. Coaches’ perceived stress levels were compared with data collected during the lockdown period. Women showed a significant decrease in their perceived stress levels compared to the lockdown period, whereas this was not true for men. Hierarchical regression indicated that, during the rebooting phase, increased age of coaches and their psychological well-being experienced in sporting contexts (a sport mental health dimension) were predictive of decreased perceived stress levels. Practical implications for practitioners working in this field are discussed in the conclusions.

Purpose: To identify motivational determinants explaining Physical Education teachers' behaviors promoting students' physical activity (PA) amidst the COVID-19 pandemic. Method: Nine hundred thirty-one Italian and French teachers completed a questionnaire assessing motivational determinants (self-determined motivation, self-efficacy, perceived ease and usefulness toward digital technologies, engagement at work), their intention and behaviors promoting PA, in reference to before and during the pandemic. Path analyses tested the associations of changes in motivational determinants with changes in intention and behaviors. Results: Increases in autonomous, controlled motivation, self-efficacy, and perceived usefulness toward digital technologies, and a decrease in amotivation were associated with an increase in the intention to promote PA. In turn, an increase in intention, but also in self-efficacy, autonomous motivation, and perceived usefulness toward digital technologies were paired with an increase in behaviors promoting PA. Conclusion: Implications regarding the commitment of Physical Education teachers to challenging pedagogical situations, such as promoting PA amidst the COVID-19 pandemic, are discussed.

The article discusses the influence of constraints in small-sided games (SSGs) on the technical-tactical actions of U-11 football players in Spain. It highlights the variability in players' performance within SSGs due to the unpredictable nature of game scenarios. The study by Garcia-Angulo et al. focuses on how task-specific constraints affect players' actions during SSGs, emphasizing the importance of understanding these effects for coaching young athletes. However, the commentary critiques the study's theoretical basis, study design, and lack of consideration for long-term effects, suggesting the need for interdisciplinary research and rigorous methodology in future studies. [Extracted from the article]

The influence of playing formations and team ranking on the physical performance of professional soccer players is an open question that needs to be explored. The present study aimed to investigate the impact of these factors on the physical exertion of Serie A soccer players. We analyzed match data from 375 players, categorizing teams based on their final ranking and comparing performance across different playing formations. The Kruskal–Wallis test and the Dunn test with Bonferroni adjustment revealed that high-ranking (HR) teams exhibited a higher percentage of high-intensity (HI) accelerations compared to mid-ranking teams, suggesting the critical role of HI efforts in achieving favorable match outcomes. Moreover, the 4-3-3 playing formation was associated with greater acceleration demands than other formations, particularly in HR teams. Our study also established benchmarks for various performance metrics, enabling coaches to assess player performance and identify potential signs of overtraining. These findings contribute to a deeper understanding of the physical demands in soccer and offer practical implications for coaches and players in optimizing training and performance strategies. [ABSTRACT FROM AUTHOR]

Grounded in achievement goal theory and basic psychological needs theory, the aim of this study was to examine the impact of the interaction of perceived motivational climate in physical education with psychological needs satisfaction (relatedness, competence and autonomy) and psychobiosocial states on student intention to engage in leisure-time physical activity. Participants (N = 470 Italian students, 287 boys and 183 girls, aged 16-19 years) completed the Teacher-Initiated Motivational Climate in Physical Education Questionnaire, the Psychological Needs Satisfaction Scale in Physical Education, the Psychobiosocial States Questionnaire, and a measure of intention to engage in leisure-time physical activity. Structural equation modelling analysis indicated that a perceived task-involving climate was related to intention to engage in physical activity through the serial mediation of competence need satisfaction and pleasant/functional psychobiosocial states. The findings highlight the importance of task-involving climate and competence need satisfaction in determining pleasant emotional states and, consequently, in promoting leisure-time physical activity. Teachers should apply curricular and pedagogical strategies that aim to create a task-involving motivational climate, make movement experiences personally meaningful and pleasant and therefore stimulate students to adopt an active lifestyle.

The aim of this research was to establish prevalence estimates for aphantasia, hypophantasia, typical imagery ability, and hyperphantasia in a large multi-national cohort. In Study 1, the Vividness of Visual Imagery Questionnaire was completed by 3,049 participants. Results indicated prevalence estimates of 1.2% for aphantasia, 3% for hypophantasia, 89.9% for typical imagery ability, and 5.9% for hyperphantasia. In Study 2, to replicate these findings in a larger sample, the Study 1 data were combined with openly available data from previous prevalence studies to create a total sample of 9,063 participants. Re-analysis of this data confirmed prevalence estimates of 0.9% for aphantasia, 3.3% for hypophantasia, 89.7% for typical imagery ability, and 6.1% for hyperphantasia. These robust and up-to-date estimates provide enhanced clarity to researchers regarding the prevalence of differing visual imagery abilities and provide a platform for future studies exploring the role of visual imagery in various cognitive and behavioral tasks. [ABSTRACT FROM AUTHOR]

The Multi‐Action Plan (MAP) model presents an idiosyncratic framework for human performance. MAP research has categorised four Performance Types (PTs; T1–T4) using self‐paced activities. Specifically, T1–4 present four distinct mental states experienced by athletes during performance, differing, among other aspects, in the level of effort and perceived control. However, transitions between PTs are yet to be empirically investigated. This study aimed to examine MAP in the hyperdynamic open‐skill combat context of judo. We explored how judoka experienced PTs and the transition processes between these mental states. Six British, high‐level judoka (n = 6; Mdnage = 19) were interviewed using a retrospective semi‐structured interview schedule. Interpretative phenomenological analysis indicated that judo presents a hyperdynamic difficult‐to‐predict performance context due to the opponent and fighting rhythm. Second, participants strongly related to T2 and T3 and less to T1 and T4. They also reported experiences 'between' T2 and T3. Lastly, participants reported common transition pathways (e.g., T2–T3), typical transition cues, and specific trainable strategies to optimise performance. Findings are discussed in relation to existing literature. Lastly, we present limitations, applied, and research considerations. Highlights: The Multi‐Action Plan model presents four distinct mental states experienced by athletes during performance, differing, among other aspects, in the level of effort and perceived control.The study findings indicate that judo presents a complex and dynamic performance environment, in which judoka (judo practitioners) mostly experience effortful and controlled mental states.Judoka experience specific transitions and respective self‐regulatory processes between mental states during a fight, which can lead to optimal (upregulation) or suboptimal (downregulation) performance. [ABSTRACT FROM AUTHOR]

(1) Background: Adolescents who are under the care of child and youth institutions are vulnerable due to factors that can include disruption to family structure or education and adverse experiences. They often experience poor or unstable support systems, leaving them at risk of delinquency. In this context, sports engagement may provide a stable structure and have positive effects in this population. Therefore, the purpose of this study was to explore the perceptions, knowledge, beliefs, and behaviors regarding social and emotional skills among at-risk adolescents, with a specific focus on their engagement in sports. (2) Methods: Ninety-six adolescents aged 12 to 17 years (66 female, 30 male), residing in child and youth care institutions across Italy, Portugal, the UK, and Turkey, participated in this study. The participants were divided into 14 focus groups, each with six to eight participants of similar ages. (3) Results: Thematic analysis revealed four main themes: Emotional causes of behavioral problems; Emotional skills to regain control; Social support makes sports worthwhile; Sport as a socio-emotional resource. (4) Conclusions: The study findings highlight that although sports create many challenging emotional situations for these adolescents, they also provides resources that may help them cope with their emotions within and beyond sports. [ABSTRACT FROM AUTHOR]

The effects of mindfulness-based interventions on performance have recently been investigated, with several studies assessing changes in brain activity. The aim of the current systematic review was to identify the neural correlates of mindfulness practice that enhance performance. We completed searches on Scopus, PubMed, EBSCO, and Web of Science in February 2020. Peer-reviewed studies that implemented mindfulness-based interventions or compared groups of mindfulness meditators with non-practitioners and measured the neural activity underpinning performance were eligible. The quality of the studies and evidence was assessed with the Cochrane risk of bias tool and the GRADE system. Of the 1836 records identified, 20 published articles (925 participants) were found, including 8 experimental, 5 quasi-experimental, and 7 cross-sectional studies. None of the studies were rated as having a low risk of bias. The quality of evidence was graded to be low and very low. The main finding that emerged was the potential enhancing effect of mindfulness practice on performance monitoring abilities, which are highly important to detect and adjust to errors. Overall findings did not provide a robust evidence for neural correlates of mindfulness practice aimed to enhance performance, highlighting the need for future research. This study is registered on PROSPERO, number CRD42020185471. [ABSTRACT FROM AUTHOR]

In sports, athletes might train or compete with some degree of mental fatigue that has an impact on performance. The present study investigated the effect of strategic motivational self-talk on endurance performance in mentally fatigued individuals. Twelve healthy men performed three cycling endurance tests at 80% peak power output until exhaustion. Two experimental conditions (mental fatigue [MF] and mental fatigue plus motivational self-talk [MF + M−ST]) and a control condition (CO) were set out. Mental fatigue was induced via 30 min Stroop task; an electroencephalogram of the frontal cerebral cortex was continually monitored. Affective state and perceived exertion were recorded during each session and subjective workload after the endurance exercise trials. Theta band power spectral density was significantly higher in both experimental condition (MF and MF + M−ST) compared to CO, without significant differences between MF and MF + M−ST. Endurance performance was significantly worse in MF (227 ± 63s) than in CO (329 ± 84s). However, motivational self-talk reversed the deleterious effect of MF on endurance performance as in MF + M−ST (368 ± 139s) it was significantly better than MF and not significantly different from CO. Displeasure and perceived exertion scores were similar at the end of exercise and presented similar rate of increase among conditions. Mental demand after exercise was significantly greater in MF than in CO condition. These results suggest that motivational self-talk mitigates the negative effect of MF on endurance performance due to an elevated engagement with the task. Lay summary: This study examined to what extent the deliberate and planned use of cue words to enhance motivation (i.e., motivational self-talk), influenced endurance performance in mentally fatigued individuals. The harmful impact of mental fatigue on endurance performance was mitigated by using motivational self-talk during cycling exercise. Strategic motivational self-talk can be used to mitigate the harmful effect of mental fatigue effect on endurance performance. Motivational self-talk can be used to slow down the athletes' perceived exertion and the feeling of displeasure during high-intensity endurance training and competitions. [ABSTRACT FROM AUTHOR]

Pompa, D, Carson, HJ, Beato, M, di Fronso, S, and Bertollo, M. Attentional focus effects on lower-limb muscular strength in athletes: A systematic review. J Strength Cond Res 38(2): 419-434, 2024--Evidence links an athlete's focus of attention to enhancing strength performance. However, additional research is needed to investigate the applicability of studies beyond the tasks and population currently examined. Therefore, we aimed to systematically review studies concerning attentional focus effects on strength characteristics on lower-limb tasks in athletes. Scopus, Web of Science, and EBSCO databases were searched using PRISMA PERSIST guidelines and keywords related to the focus of attention, force production processes, and athletes. Subjects were categorized: world class (tier 5); elite (tier 4); highly trained (tier 3); trained/developmental (tier 2); nonathletes (tiers 1-0); and mixed (different levels). Fifteen of 296 studies met the inclusion criteria. Included studies investigated the focus of attention effects on performance (n56), between skill levels (n52), and for learning (n55), with respect to subject preference (n51); one study did not state the aim. Studies achieved an average risk of bias score of "excellent"; however, findings suffered in the assessment of certainty. Only 2 studies reported an advantage for one type of attentional focus (external focus) across conditions (g 5 0.13-0.42) with tier 2 and mixed tier athletes. Research does not address the needs of elite athletes, and there is limited evidence on each type of strength characteristics and muscle action. There is also a need to incorporate methodological steps to promote task-relevant instructions. Research should focus on contextualized information within professional practice to offer stronger translational implications for athletes and coaches. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of the study was to investigate the individuals' dynamics of perceived control and hedonic tone over time, with respect to the 4 performance states as conceptualized within the multiaction plan (MAP) model. We expected to find idiosyncratic and differentiated trends over time in the scores of perceived control and hedonic tone, typified by fluctuations among 2 optimal and 2 suboptimal types of processing during performance. Method: Ten elite-level shooters participated in the study. They were asked to identify the most relevant, idiosyncratic core component of their shooting action and perform 120 shots distanced 10 m from the target. Subjective accounts of perceived control and hedonic tone of the core component of action were assessed prior to and after each shot. We used a probabilistic approach to derive the 4 performance categories according to 2 × 2 interactions of perceived control and performance and hedonic tone and performance. Results: Logistic ordinal regression analysis enabled the identification of 4 idiosyncratic performance types for each athlete with respect to perceived control and hedonic tone intensity scores. Within- and between-individual differences in intensity bandwidth and probability levels were apparent across the 4 performance types. Changes among 4 types of processing were also observed during performance. Conclusion: Consistent with the MAP model conceptualization, the findings provided support for the different patterns of perceived control and hedonic tone intensity scores during performance. The results suggest applied arguments for using action- and emotion-centered strategies to help athletes in reaching and sustaining optimal performance states.

A novel multimodal experimental setup and dyadic study protocol were designed to investigate the neurophysiological underpinnings of joint action through the synchronous acquisition of EEG, ECG, EMG, respiration and kinematic data from two individuals engaged in ecologic and naturalistic cooperative and competitive joint actions involving face-to-face real-time and real-space coordinated full body movements. Such studies are still missing because of difficulties encountered in recording reliable neurophysiological signals during gross bodymovements, in synchronizingmultiple devices, and in defining suitable study protocols. The multimodal experimental setup includes the synchronous recording of EEG, ECG, EMG, respiration and kinematic signals of both individuals via two EEG amplifiers and a motion capture system that are synchronized via a single-board microcomputer and custom Python scripts. EEG is recorded using new dry sports electrode caps. The novel study protocol is designed to best exploit the multimodal data acquisitions. Table tennis is the dyadic motor task: it allows naturalistic and face-to-face interpersonal interactions, free in-time and in-space full body movement coordination, cooperative and competitive joint actions, and two task difficulty levels to mimic changing external conditions. Recording conditions--including minimum table tennis rally duration, sampling rate of kinematic data, total duration of neurophysiological recordings--were defined according to the requirements of a multilevel analytical approach including a neural level (hyperbrain functional connectivity, Graph Theoretical measures and Microstate analysis), a cognitive-behavioral level (integrated analysis of neural and kinematic data), and a social level (extending Network Physiology to neurophysiological data recorded from two interacting individuals). Four practical tests for table tennis skills were defined to select the study population, permitting to skill-match the dyad members and to form two groups of higher and lower skilled dyads to explore the influence of skill level on joint action performance. Psychometric instruments are included to assess personality traits and support interpretation of results. Studying joint action with our proposed protocol can advance the understanding of the neurophysiological mechanisms sustaining daily life joint actions and could help defining systems to predict cooperative or competitive behaviors before being overtly expressed, particularly useful in real-life contexts where social behavior is a main feature. [ABSTRACT FROM AUTHOR]

Investment in outdoor parks is proposed as a promising large-scale strategy to promote physical activity (PA). This study aimed to systematically review the impact of park renovations or installing new ones in increasing PA. Searches were conducted using predefined terms in three databases (PubMed, Scopus, and Web of Science) in March 2022. Studies examining the effectiveness of park renovations or developing new ones in increasing PA and having control or comparison were eligible for inclusion. Study quality was assessed using the Quality Assessment Tool for Quantitative Studies. Data were extracted from the included records using a predefined extraction table. The database search yielded 959 records, and 26 were included. For park renovations (n = 17), 11 (65%) studies presented findings supporting a positive effect on PA. The other six (35%) studies found no PA benefits when compared to control or pre-renovations/improvement levels. Regarding new installations (n = 9), five (56%) studies presented improvements in PA, and four (44%) did not. A promising positive impact of park renovations and new installations on park use and PA was observed. The review findings reflect the need to understand the context, daily routines, and interests of the surrounding population before renovating or installing new outdoor parks. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this study was to examine the effects of task- and ego-involving climate manipulations on students' climate perception and psychobiosocial (PBS) states in a physical education setting. Method: Two subsamples of female students (N = 108, 14-15 years of age) participated in 12 lessons on either a task-or an ego-involving climate intervention as grounded in the TARGET (tasks, authority, recognition, grouping, evaluation, and time) model. Results: At the end of the treatment, the participants of the ego-involved group reported lower scores in the perceived task-involving climate and higher scores in the perceived ego-involving climate compared with their peers in the task-involved group. Lower scores in pleasant/functional PBS states and higher scores in unpleasant/dysfunctional PBS states were also observed in the ego-involved group as a consequence of the intervention. Conclusion: Findings suggested that teachers' induced achievement motivational climates can influence students' perceptions and prompt PBS states consistent with the motivational atmosphere.

The purpose of this study was to investigate the effectiveness of a sensorimotor rhythm (SMR) neurofeedback training (NFT) and biofeedback training (BFT) intervention on ice hockey shooting performance. Specifically, the purpose was to examine (a) whether an NFT/BFT program could improve ice hockey shooting performance, (b) whether the implementation of an SMR-NFT intervention leads to neurological adaptations during performance, and (c) whether such neurological changes account for improvement in shooting performance. Using a longitudinal stratified random control design, results demonstrated that while both SMR-NFT/BFT and control groups improved performance, the rate of improvement for the SMR-NFT/BFT group was significantly higher than the control. Participants in the SMR-NFT/BFT group demonstrated the ability to significantly increase SMR power from pre- to postintervention in the lab. However, no significant changes in SMR power were found during shooting performance. This result may be suggestive of differing cortical activity present during motor-skill preparation. [ABSTRACT FROM AUTHOR]

In the realm of sports performance, coping skills play a pivotal role, particularly within the stress)inducing environment of sports. The aim of this research was to explore differences between football athletes who had tested positive for COVID-19 and athletes who had not contracted the virus in terms of their utilization of coping strategies. Additionally, differences among countries were investigated, in the case of football players who had, at some point, battled COVID-19. A total of 147 (one hundred and forty-seven) male football players from five European countries - Italy, Latvia, Lithuania, Poland, and Romania – took part in this study. To assess coping skills, we employed the Brief COPE questionnaire, which encompassed fourteen coping strategies, grouped into three categories: emotion-oriented coping strategies, problem/task-oriented strategies, and dysfunctional coping strategies. Using the Dwass-Steel-Critchlow-Fligner pairwise comparison test, the differences between the five countries were scrutinized, starting from the three dependent variables (the grouped coping strategies). Notably, football athletes from Poland and Romania exhibited a higher frequency of employing emotion-focused coping strategies (during the pandemic). Conversely, athletes from Italy leaned towards employing problem-focused strategies more frequently. No significant differences were observed in terms of dysfunctional coping strategies among football players who had battled COVID-19 across the five countries. We discussed the frequency of using coping strategies among football athletes who reported no infection with the SARS-COV-2 virus (up to the 4 th wave of the pandemic) and those who had experienced COVID-19. The findings are of considerable interest to specialists, raising awareness on the coping skills employed by footballers during the pandemic. [ABSTRACT FROM AUTHOR]

Ambiguous silhouettes representing human individuals which perform unimanual actions are interpreted more often as right-handed. Such a preference might reflect a perceptual frequency effect, due to the fact that most social interactions occur with right-handers. As a consequence, observers would preferentially attend to the region in which others' dominant hand usually falls, thus increasing the efficiency in monitoring both aggressive and communicative acts. Given that men can be more dangerous compared with women, the right-hand bias should be larger when observing male rather than female individuals, and given that aggressive interactions involve men more frequently than women, it should be larger in male rather than female observers. However, previous studies did not specifically test whether: (i) male—compared with female—observers pay more attention to the right side of others (regardless of the observed individuals' sex), or (ii) observers (regardless of their sex) pay more attention to the right side of male—compared with female—individuals. Therefore, in the present study we used ambiguous human silhouettes rotating about their vertical axis with one arm extended in order to determine whether the rightward bias is larger for male rather than female figures and/or in male rather than female participants. According to our data, the bias toward the right side of human bodies was not significantly associated with either the figure's or the participant's sex. [ABSTRACT FROM AUTHOR]

Monitoring recovery in the context of athletic performance has gained significant importance during recent years. As a systematic process of data collection and evaluation, the monitoring of recovery can be implemented for various purposes. It may help prevent negative outcomes of training or competition, such as underrecovery, overtraining, or injuries. Furthermore, it aims to establish routines and strategies necessary to guarantee athletes' readiness for performance by restoring their depleted resources. Comprehensive monitoring of recovery ideally encompasses a multidimensional approach, thereby considering biological, psychological, and social monitoring methods. From a biological perspective, physiological (eg, cardiac parameters), biochemical (eg, creatine kinase), hormonal (eg, salivary cortisol), and immunological (eg, immunoglobulin A) markers can be taken into account to operationalize training loads and recovery needs. Psychological approaches suggest the application of validated and reliable psychometric questionnaires (eg, Recovery–Stress Questionnaire for Athletes) to measure a subjective perception of recovery, as well as the subjective degree of training- or competition-induced fatigue. Social aspects also play a role in performance monitoring and may hence provide essential performance-related information. The implementation of a monitoring routine in athletic environments represents a continuous process that functions as an effective addition to training and depends on a range of conditions (eg, organizational regulations, commitment of athletes). Current research in the field of monitoring aims to establish individualized monitoring regimens that refer to intraindividual reference values with the help of innovative technological devices. [ABSTRACT FROM AUTHOR]

The relationship between recovery and fatigue and its impact on performance has attracted the interest of sport science for many years. An adequate balance between stress (training and competition load, other life demands) and recovery is essential for athletes to achieve continuous high-level performance. Research has focused on the examination of physiological and psychological recovery strategies to compensate external and internal training and competition loads. A systematic monitoring of recovery and the subsequent implementation of recovery routines aims at maximizing performance and preventing negative developments such as underrecovery, nonfunctional overreaching, the overtraining syndrome, injuries, or illnesses. Due to the inter- and intraindividual variability of responses to training, competition, and recovery strategies, a diverse set of expertise is required to address the multifaceted phenomena of recovery, performance, and their interactions to transfer knowledge from sport science to sport practice. For this purpose, a symposium on Recovery and Performance was organized at the Technical University Munich Science and Study Center Raitenhaslach (Germany) in September 2016. Various international experts from many disciplines and research areas gathered to discuss and share their knowledge of recovery for performance enhancement in a variety of settings. The results of this meeting are outlined in this consensus statement that provides central definitions, theoretical frameworks, and practical implications as a synopsis of the current knowledge of recovery and performance. While our understanding of the complex relationship between recovery and performance has significantly increased through research, some important issues for future investigations are also elaborated. [ABSTRACT FROM AUTHOR]

This study examined the relations of physical education teachers' burnout with some individual variables, including teachers' self-perceived physical fitness and the perceived influence of personal fitness on teaching. Participants were 219 Italian physical education teachers in secondary school. Demographic and professional information, ratings of self-perception of physical condition, and the Italian version of the Maslach Burnout Inventory were recorded. Compared to the data of a normative sample, average scores on the three dimensions of the Maslach Burnout Inventory (Emotional Exhaustion, Depersonalisation, and Reduced Personal Accomplishment) were found. There were statistically significant associations among Reduced Personal Accomplishment, the self-perception of physical fitness, and the perception of the influence of personal fitness on teaching. Women reported scores on Emotional Exhaustion and Reduced Personal Accomplishment indicative of greater severity than men. No significant differences appeared to be related to the years of teaching. Recommendations for further studies are discussed. DOI 10.2466/06.07.11.14.PMS.111.6.790-798

This study investigated the role played by Blocked (low contextual interference) and Random (high contextual interference) schedules in the acquisition of rhythmic footstep sequences by adolescent females (N =40, M age = 15.8 yr., SD = 1.3). After a baseline assessment ([T.sub.0]), motor learning was assessed after six sessions ([T.sub.1]) in terms of the participants' ability to reproduce the step sequences using visual and auditory guidance. A retention test ([T.sub.2]) also occurred 21 days after [T.sub.1]. Analysis of variance yielded significant main effects of group, test, and an interaction. Both groups improved performance from [T.sub.0] to [T.sub.1], but the Blocked schedule group outperformed the Random schedule group at [T.sub.1]. Significant group differences were not observed at [T.sub.2]. The Random schedule group's performance did not significantly change from [T.sub.1] to [T.sub.2], and the Blocked schedule group's performance significantly decreased. Apparently, the learning of rhythmic footstep dance sequences was not influenced by practice organization. DOI 10.2466/PMS.110.1.77-84