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1.
The purpose of this study was to examine whether whole-body vibration (WBV) training results in short-term performance improvements in flexibility, strength and balance tests in comparison to an equivalent exercise program performed without vibration. Eleven elite rhythmic gymnasts completed a WBV trial, and a control, resistance training trial without vibration (NWBV). The vibration trial consisted of eccentric and concentric squatting exercises on a vibration platform that was turned on, whereas the NWBV involved the same training protocol with the platform turned off. Balance was assessed using the Rhythmic Weight Shift (RWS) based on the EquiTest Dynamic Posturography system; flexibility was measured using the sit & reach test, and lower limb explosive strength was evaluated using standard exercises (squat jump, counter movement jump, single leg squat). All measurements were performed before (pre) immediately after the training program (post 1), and 15 minutes after the end of the program (post 15). Data were analyzed using repeated measures ANOVA was used with condition (WBV-NWBV) as the primary factor and time (pre, post 1, post 15) as the nested within subjects factor, followed by post-hoc pairwise comparison with Bonferroni corrections. Results confirmed the hypothesis of the superiority of WBV training, especially in the post 15 measurement, in all flexibility and strength measures, as well as in a number of balance tests. 相似文献
2.
Drop jumps and their adaptations to training have been extensively investigated. However, the influence of augmented feedback (aF) on stretch-shortening cycle (SSC) was not scrutinized so far despite the well-known positive effects of aF on motor performance and motor learning. The aim of the present study was therefore to investigate the effects of aF by evaluating immediate within-session effects and long-term adaptations. 34 participants were assigned to three groups that trained drop jumps with different relative frequencies of aF about their jump height: 100%, 50%, or 0%. A significant within-session effect of aF on jump height was observed before and also after the training period (pre: +4.6%; post: +2.6%). In the long-term (comparing pre- to post-measurement), the 100% group showed the greatest increase in jump height (+14%), followed by the 50% (+10%) and the 0% group (+6%). The importance of aF on drop jumps is therefore twofold: (i) to immediately increase jump performance and (ii) to improve long-term training efficacy. In contrast to the proposition of the guidance hypothesis, high frequency of aF seems to be beneficial when maximizing SSC-performance. As jump height cannot be quantified without objective technical measures it is recommended to include them into daily training. 相似文献
3.
PurposeTo evaluate the effects of demographics and hormonal variations on knee muscle performance in patients with acromegaly and develop explanatory models of peripheral muscle function in these individuals. MethodsThis was a cross-sectional study in which 53 acromegalics and 27 healthy subjects underwent knee isokinetic dynamometry to evaluate the peak torque value for leg extension at 75°/s (PTE75) and 240°/s (PTE240). Separate multivariable linear regression models for the prediction of PTE75 and PTE240 were tested using variables commonly used as predictors in the clinical setting and other specific variables related to acromegaly. ResultsThe final prediction model for PTE75 (R 2 = 0.888; adjusted R 2 = 0.820, SE of bias = 16.2 Nm, p < 0.001) was −0.221 × growth hormone + 36.791 × sex male = 1 − 27.407 × status active = 1 − 0.690 × age + 148.071. The final prediction model for PTE240 (R 2 = 0.816; adjusted R 2 = 0.805, SE of bias = 8.8 Nm, p < 0.001) was −0.174 × growth hormone + 12.522 × sex male = 1 − 0.520 × age + 98.099. ConclusionsIn acromegalics, high growth hormone levels, female gender, and older age are associated with reduced muscle strength and endurance. Additionally, active disease negatively affects peripheral muscle strength in these patients. 相似文献
4.
Three experimental studies tested whether a priming procedure intended to activate an autonomy orientation would lead to nondefensiveness
and enhanced performance, whether activated control orientation would lead to higher defense and impaired performance, and
whether activated impersonal orientation would lead to the greatest defense and worst performance. Study 1 showed that autonomy-primed
participants report lower desire for escape compared to control-primed, and that impersonally-primed showed most desire to
escape. In Study 2, autonomy-primed participants showed the least self-serving bias, control-primed were in the middle, and
impersonally-primed participants showed the most. In Study 3, rowers autonomy-primed showed the least self-handicapping and
best performance, control-primed showed moderate levels, and impersonally-primed showed the most self-handicapping and worst
performance. Results are discussed in terms of motivation orientation, defensiveness, and performance.
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5.
This study examined the relationship between pre-performance motivational states (challenge vs. threat) and subsequent performance in athletic competition. Prior to the season, college baseball and softball players imagined and gave a speech about a specific baseball/softball playing situation while cardiovascular indexes of challenge and threat were recorded. These physiological challenge/threat indexes significantly predicted athletic performance during the subsequent season, such that players who experienced challenge in the laboratory performed better relative to those who experienced threat. The implications for personnel selection and the biopsychosocial model of challenge and threat are discussed. 相似文献
6.
ObjectivesThis study aimed to investigate the effects of mental training applied to combat sports athletes. MethodsA systematic review was conducted, following the criteria recommended by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement, from inception up to February 2021, with an electronic search in PubMed, Scopus, Web of Science, PsycINFO, and SPORTDiscus databases. As eligibility criteria, this review included original studies that carried out any type of mental training, with or without a control group, acute or chronic, in combat sports athletes, of both sexes, age >16 and < 45 years old, from any competitive level, and evaluated the effect of these interventions on psychological measures. The quality assessment was conducted through the application of the Cochrane Collaboration tool. ResultsIn total, 1921 studies were found and after application of the inclusion and exclusion criteria, 21 articles were included in this review. A total of 417 subjects were investigated from the 21 studies. As results, despite the variations in the type and characteristics of the interventions, studies showed that mental training seems to improve anxiety, mood, self-confidence, emotions, cohesion, emotional balance, and relaxation, in addition to physical and athletic performance. ConclusionsThis systematic review based on the evidence from the selected studies indicates that mental training seems to be beneficial for athletes in combat modalities, while combat sports can benefit from mental training in preparation, competition, and recovery. However, the interpretation of these findings must consider that there is limited scientific production with good quality studies investigating the effects of psychological intervention protocols in athletes of combat sports in different combat modalities. Prospero register numberCRD42020169793. 相似文献
7.
Background and Objectives: The present study assessed the extent to which individual differences in psychological coping resources are related to athletic performance; whether they can attenuate the amount of performance variance accounted for by physical/technical skills; and whether coping resources remain significant predictors of performance when physical/technical skill level is statistically controlled. Methods: Twenty college golf coaches rated the physical/technical skills of 189 men and women varsity golfers on their teams. Athletes completed the Athletic Coping Skills Inventory (ACSI-28), with the total (Personal Coping Resources) score serving as a global measure of sport-relevant psychological coping resources. Subsequent performance (stroke average per round) of 105 golfers was assessed over a mean of 12.04 competitive rounds during the remainder of the season. Results: Physical/technical skills and psychological coping resource measures were minimally correlated and both were significant and similarly influential predictors of performance. With psychological resources controlled, performance variance accounted for by physical/technical skills was reduced from 21.2% to 10.6%. With physical/technical skills statistically controlled, psychological coping resources, though reduced from 18.2% to 7.5% of accountable variance, remained a significant predictor of performance. Conclusion: Results support the significant role played by psychological coping resources as predictors of athletic performance, together with their ability to “level the field” by reducing the influence of physical/technical talent. 相似文献
8.
Objectives“Stereotype threat” occurs when people perform worse at a task due to the pressure of a negative stereotype of their group's performance. We examined whether female athletes may underperform at an athletic task if prompted to think about gender stereotypes of athleticism. We also explored whether gender stereotypes regarding general athletic ability would be affected by a standard stereotype threat induction. DesignWe used a 2 (participant gender) × 2 (stereotype threat manipulation) factorial design with task performance and gender stereotypes of athleticism as dependent measures. MethodFemale and male tennis and basketball college student athletes performed two athletic tasks relevant to their sport: a difficult concentration task and an easier speed task. Participants were told beforehand that (1) there was a gender difference on the tasks (to induce stereotype threat) or (2) there was no gender difference (to remove any preexisting stereotype threat). ResultsOn the difficult task, women performed worse than men only when stereotype threat was induced. Performance on the easier speed task was unaffected by the stereotype information. Interestingly, women's beliefs regarding women's and men's general athleticism were also affected by the manipulation. ConclusionsWe concluded that one minor comment regarding a very specific athletic task may sometimes impair task performance and alter gender stereotypes of athleticism among women. Some implications for preventing negative stereotype threat effects are discussed. 相似文献
9.
Associations among personality as measured by the Five Factor Model, physical activity, and muscle strength were assessed using data from the Baltimore Longitudinal Study of Aging ( N = 1220, age: mean = 58, SD = 16). General linear modeling with adjustment for age, sex, race, and body mass index, and bootstrapping for mediation were used. We found neuroticism and most of its facets to negatively correlate with strength. The extraversion domain and its facets of warmth, activity, and positive-emotions were positively correlated with strength, independent of covariates. Mediation analysis results suggest that these associations are partly explained by physical activity level. Findings extend the evidence of an association between personality and physical function to its strength component and indicate health behavior as an important pathway. 相似文献
10.
Studies about strategies used by adults to solve multi-digit written additions are very scarce. However, as advocated here, the specificity and characteristics of written calculations are of undeniable interest. The originality of our approach lies in part in the presentation of two-digit addition problems on a graphics tablet, which allowed us to precisely follow and analyse individuals’ solving process. Not only classic solution times and accuracy measures were recorded but also initiation times and starting positions of the calculations. Our results show that adults largely prefer the fixed columnar strategy taught at school rather than more flexible mental strategies. Moreover, the columnar strategy is executed faster and as accurately as other strategies, which suggests that individuals’ choice is usually well adapted. This result contradicts past educational intuitions that the use of rigid algorithms might be detrimental to performance. We also demonstrate that a minority of adults can modulate their strategy choice as a function of the characteristics of the problems. Tie problems and additions without carry were indeed solved less frequently through the columnar strategy than non-tie problems and additions with a carry. We conclude that the working memory demand of the arithmetic operation influences strategy selection in written problem-solving. 相似文献
11.
The goal of this study was to determine if there was a relationship between athletic identity, a relatively stable individual difference, and athlete satisfaction. A second goal was to evaluate the structure of athletic identity to examine potential differences between facets. Analyzing data from 175 NCAA student athletes, results indicated that use of overall athletic identity hid meaningful relationships between this self-identity concept and level of athlete satisfaction. When examined at the facet level, results indicated that athletic social identity and negative affectivity were positively related to athlete satisfaction while the exclusivity facet of athletic identity was negatively related to athlete satisfaction. 相似文献
12.
While strategic self-talk interventions are well documented, less is known regarding organically occurring self-talk. Previously, eight organic self-talk content categories were identified, however contextual and personal factors relating to these categories is unexplored. The aim of the study was to explore the relationships between stress, coping, athletic identity, demographic and sport-related factors and the eight organic self-talk categories of anxiety control, confidence, disengagement, instruction, psych-up, somatic fatigue, worry, and irrelevant. 216 NCAA student-athletes were recruited. Regression was used to determine the relationships between the contextual and personal variables and organic self-talk. Stress, coping and self-talk categories were compared in and out-of-season. Stress was associated with all self-talk frequencies except confidence. Coping was associated with psych-up, confidence and worry. Athletic identity was associated with psych-up, confidence, instruction and disengagement. Age was associated with anxiety control and instruction. Lastly, sport type and division level were associated with disengagement and instruction self-talk respectively. 相似文献
13.
The purpose of this study was to induce both trunk extensor and abdominal muscle fatigue, on separate occasions, and compare their effects on standing postural control and trunk proprioception, as well as look at the effects of a recovery period on these outcome measures. A total of 20 individuals participated, with 10 (5 males and 5 females) completing either a standing postural control or lumbar axial repositioning protocol. Participants completed their randomly assigned protocol on two occasions, separated by at least 4 days, with either their trunk extensor or abdominal muscles being fatigued on either day. Postural control centre of pressure variables and trunk proprioception errors were compared pre- and post-fatigue. Results showed that both trunk extensor and abdominal muscle fatigue significantly degraded standing postural control immediately post-fatigue, with recovery occurring within 2 min post-fatigue. In general, these degradative effects on postural control appeared to be greater when the trunk extensor muscles were fatigued compared to the abdominal muscles. No statistically significant changes in trunk proprioception were found after either fatigue protocol. The present findings demonstrate our body’s ability to quickly adapt and reweight somatosensory information to maintain postural control and trunk proprioception, as well as illustrate the importance of considering the abdominal muscles, along with the trunk extensor muscles, when considering the impact of fatigue on trunk movement and postural control. 相似文献
14.
ObjectivesDetachment, getting a physical, cognitive, and emotional break from the effortful demands of training and competition, is a recovery experience that can buffer the adverse effects of high sport demands on health and well-being. The matching hypothesis states that recovery strategies are most effective when they match particular sport demands. The main aim of this study was to investigate the matching hypothesis with respect to the relation between daily sport demands, detachment, and recovery state among elite athletes. DesignA one-week online daily diary study was conducted. Multilevel regression analyses tested within-subject associations between daily sport demands, detachment, and recovery state at bedtime, while controlling for recovery state in the morning. MethodSixty-eight elite athletes completed a daily diary survey after waking up (T1) and at bedtime (T2) across eight consecutive days. ResultsResults showed that daily physical detachment was positively related to daily physical recovery, whereas daily emotional detachment was positively related to daily cognitive recovery and emotional recovery. Moderating effects of daily detachment on the relation between daily sport demands and daily recovery state occurred more often when there was a match between specific types of sport demands, detachment, and recovery state rather than when there was less match or no match. ConclusionsFindings indicate that physical and emotional detachment are effective recovery strategies for elite athletes. Moreover, it is important that detachment matches the type of effort that has been spent to find the strongest stress-buffering effects. 相似文献
15.
The current study extends existing sport psychology research by developing a more comprehensive athlete attitudinal survey—the Sports Performance Inventory (SPI). A multiple item survey consisting of sport-related attitudinal items was distributed to 274 students enrolled in a large Division I Midwestern university. A principal components analysis with varimax rotation performed on the original survey items resulted in an 83 item survey with six interpretable factors: Competitiveness, Team Orientation, Mental Toughness, Emotional Control, Positive Attitude, and Safety Consciousness. All subscales demonstrated adequate item discriminability and internal consistency. Important statistically significant differences between college/novice and male/female athletes were found: (1) College athletes were found to have a higher SPI composite than novice athletes; (2) College athletes were found to have a more positive attitude than novice athletes; (3) College athletes were more competitive than novice athletes; (4) Females were more team oriented than males; and (5) Novice males were more competitive than novice females, while college females were more competitive than college males. Implications of these findings and suggestions for future research are discussed. 相似文献
17.
Previous studies have indicated that temporal concepts such as the past and future are associated with horizontal (left–right) space. This association has been interpreted as reflecting left‐to‐right writing systems. The Japanese language, however, is written both horizontally and vertically and, when texts are presented vertically, the sequence of columns runs from right to left. This study examines whether the associations between time and space are changed by the direction of the character strings using a word categorization task. Consistent with previous studies, response times and error rates indicated left‐past and right‐future associations when participants read words presented horizontally. On the other hand, response times indicated the opposite (i.e., left‐future and right‐past associations) when participants read words presented vertically. These results suggest that temporal concepts are not associated with one's body or physical space in an inflexible manner, but rather the associations can flexibly change through experience. 相似文献
18.
PurposeInvolvement in sport has the potential to cause athletes, coaches, and parents to experience stress. However, the extent to which experiences of stress are shared within the athletic triad is unknown. The purpose of this study was to examine the individual and shared stress experiences among youth swimmers, their mothers, and coach within the context of training, tapering, and competition. DesignMulti-case study design. MethodFour female swimmers, their mother, and one coach completed daily diaries for six weeks and up to three semi-structured interviews. Data were analyzed through within- and cross-case thematic analysis. ResultsThe study showed evidence of shared stress experiences between all three members of the athletic triad. Participants predominately encountered organizational stressors, which they appraised in relation to movements between squad, interpersonal relationships, and overall progress towards performance goals/outcomes. Numerous coping strategies were employed by participants, with varying degrees of effectiveness, such as seeking social support, distancing, and lift sharing. The coping strategies used by coaches, swimmers, and parents were often interrelated with participants frequently seeking emotional support from one another. The majority of stressors and appraisals cited by parents and swimmers were shared, with both heavily relying on social support to help each other cope with the stressors encountered. ConclusionAthletes, parents, and coaches have the capacity to influence one another's stress experiences and as such their experiences should be considered simultaneously to maximize the impact of interventions. 相似文献
19.
Aggressive players who intentionally cause injury to their opponents are common in many sports, particularly collision sports such as Rugby Union. Although some acts of aggression fall within the rules (sanctioned), others do not (unsanctioned), with the latter tending to be less acceptable than the former. This study attempts to identify characteristics of players who are more likely to employ unsanctioned methods in order to injure an opponent. Male Rugby Union players completed questionnaires assessing aggressiveness, anger, past aggression, professionalization, and athletic identity. Players were assigned to one of two groups based on self‐reported past unsanctioned aggression. Results indicated that demographic variables (e.g., age, playing position, or level of play) were not predictive of group membership. Measures of aggressiveness and professionalization were significant predictors; high scores on both indicated a greater probability of reporting the use of unsanctioned aggressive force for the sole purpose of causing injury or pain. In addition, players who had been taught how to execute aggressive illegal plays without detection were also more likely to report using excessive force to injure an opponent. Results provide further support that highly professionalized players may be more likely to use methods outside the constitutive rules of Rugby Union in order to intentionally injure their opponents. Results are discussed within the context of the increasing win‐at‐all‐cost attitude that is becoming more prevalent in sport and its implications for youth athletes. Aggr. Behav. 35:237–243, 2009. © 2009 Wiley‐Liss, Inc. 相似文献
20.
Despite the widely accepted belief that meaning making is essential for mental health following adversity, the available research continues to provide mixed findings: meaning making is sometimes evident, sometimes not, and more frequently than we would expect associated with poor health outcomes. The papers that comprise this special issue of Memory put flesh to those bones by approaching the question from a narrative memory perspective. Meaning making, these studies demonstrate, is a multi-faceted phenomenon and whether it is necessary or adaptive depends on which particular form of meaning making is considered and on the context and timing in which it occurs. To situate these insights in a broader framework I consider parallels with the emergent literature on regulatory flexibility and briefly review recent research and theory on that construct as it has been applied in the literatures on coping and emotion regulation. Finally, I close by suggesting a basic framework, informed by the flexibility construct, that might guide future research on meaning making. 相似文献
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