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Chen JT, Kan NW, Barquero C, Teo MMJ, Wang CA. Saccade Latency and Metrics in the Interleaved Pro- and Anti-Saccade Task in Open Skill Sports Athletes. Scand J Med Sci Sports 2024; 34:e14713. [PMID: 39155402 DOI: 10.1111/sms.14713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/17/2024] [Accepted: 07/29/2024] [Indexed: 08/20/2024]
Abstract
Evidence has demonstrated that athletes exhibit superior cognitive performance associated with executive control. In the oculomotor system, this function has been examined using the interleaved pro-saccade and anti-saccade task (IPAST), wherein participants, prior to target appearance, are instructed to either automatically look at the peripheral target (pro-saccade) or suppress the automatic response and voluntarily look in the opposite direction (anti-saccade). While the IPAST has provided much insight into sensorimotor and inhibitory processing, it has yet to be performed in athletes. Moreover, limited research has examined saccade metrics in athletes. Here, we examined saccade latency and movement kinematics in the IPAST among athletes (N = 40) and nonathletes (NON) (N = 40). Higher direction error rates were obtained in the anti-saccade compared to the pro-saccade condition, with no differences between athletes and NON noted. Significantly faster saccade latencies were observed in athletes compared to NON in both conditions, in addition to faster pro-saccades compared to anti-saccades. Furthermore, athletes showed significantly higher frequencies and faster latencies of express saccades compared to NON in correct pro-saccades. Additionally, athletes exhibited significantly faster latencies of express saccades compared to NON in erroneous anti-saccades. Differences in saccade metrics between athletes and NON were not seen. Overall, these findings demonstrate that athletes display altered saccade performance likely associated with sensorimotor and preparatory processing, highlighting the potential of using IPAST to objectively investigate sensorimotor and cognitive functions in athletes.
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Affiliation(s)
- Jui-Tai Chen
- Department of Anesthesiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei City, Taiwan
- Department of Anesthesiology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Nai-Wen Kan
- Center of General Education, Taipei Medical University, Taipei City, Taiwan
| | - Cesar Barquero
- Department of Physical Activity and Sport Science, Universidad Peruana de Ciencias Aplicadas, Lima, Peru
- Institute of Cognitive Neuroscience, College of Health Science and Technology, National Central University, Taoyuan City, Taiwan
| | - Moeka Mong Jia Teo
- Graduate Institute of Injury Prevention and Control, Taipei Medical University, Taipei City, Taiwan
| | - Chin-An Wang
- Department of Anesthesiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei City, Taiwan
- Department of Anesthesiology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Eye-Tracking Laboratory, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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Vicente R, Bittencourt J, Costa É, Nicoliche E, Gongora M, Di Giacomo J, Bastos VH, Teixeira S, Orsini M, Budde H, Cagy M, Velasques B, Ribeiro P. Differences between hemispheres and in saccade latency regarding volleyball athletes and non-athletes during saccadic eye movements: an analysis using EEG. ARQUIVOS DE NEURO-PSIQUIATRIA 2023; 81:876-882. [PMID: 37852289 PMCID: PMC10631850 DOI: 10.1055/s-0043-1772830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 06/16/2023] [Indexed: 10/20/2023]
Abstract
BACKGROUND The saccadic eye movement is responsible for providing focus to a visual object of interest to the retina. In sports like volleyball, identifying relevant targets quickly is essential to a masterful performance. The training improves cortical regions underlying saccadic action, enabling more automated processing in athletes. OBJECTIVE We investigated changes in the latency during the saccadic eye movement and the absolute theta power on the frontal and prefrontal cortices during the execution of the saccadic eye movement task in volleyball athletes and non-athletes. We hypothesized that the saccade latency and theta power would be lower due to training and perceptual-cognitive enhancement in volleyball players. METHODS We recruited 30 healthy volunteers: 15 volleyball athletes (11 men and 4 women; mean age: 15.08 ± 1.06 years) and 15 non-athletes (5 men and 10 women; mean age: 18.00 ± 1.46 years). All tasks were performed simultaneously with electroencephalography signal recording. RESULTS The latency of the saccadic eye movement presented a significant difference between the groups; a shorter time was observed among the athletes, associated with the players' superiority in terms of attention level. During the experiment, the athletes observed a decrease in absolute theta power compared to non-athletes on the electrodes of each frontal and prefrontal area. CONCLUSION In the present study, we observed the behavior of reaction time and absolute theta power in athletes and non-athletes during a saccadic movement task. Our findings corroborate the premise of cognitive improvement, mainly due to the reduction of saccadic latency and lower beta power, validating the neural efficiency hypothesis.
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Affiliation(s)
- Renan Vicente
- Universidade Federal do Rio de Janeiro, Escola de Educação Física e Desportos, Rio de Janeiro RJ, Brazil.
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
| | | | - Élida Costa
- Universidade Federal do Rio de Janeiro, Escola de Educação Física e Desportos, Rio de Janeiro RJ, Brazil.
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
| | - Eduardo Nicoliche
- Universidade Federal do Rio de Janeiro, Escola de Educação Física e Desportos, Rio de Janeiro RJ, Brazil.
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
| | - Mariana Gongora
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
| | - Jessé Di Giacomo
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro RJ, Brazil.
| | - Victor Hugo Bastos
- Universidade Federal do Piauí, Departamento de Fisioterapia, Teresina PI, Brazil.
| | - Silmar Teixeira
- Universidade Federal do Piauí, Departamento de Fisioterapia, Teresina PI, Brazil.
| | - Marco Orsini
- Universidade Federal Fluminense, Hospital Universitário Antônio Pedro, Niterói RJ, Brazil.
| | - Henning Budde
- Medical School Hamburg, Faculty of Human Sciences, Hamburg, Germany.
- Reykjavik University, Department of Sport Science, Reykjavik, Iceland.
| | - Mauricio Cagy
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
- Universidade Federal do Rio de Janeiro, Departamento de Engenharia Biomédica, Rio de Janeiro RJ, Brazil.
| | - Bruna Velasques
- Universidade Federal do Rio de Janeiro, Escola de Educação Física e Desportos, Rio de Janeiro RJ, Brazil.
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
| | - Pedro Ribeiro
- Universidade Federal do Rio de Janeiro, Escola de Educação Física e Desportos, Rio de Janeiro RJ, Brazil.
- Universidade Federal do Rio de Janeiro, Instituto de Psiquiatria, Rio de Janeiro RJ, Brazil.
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Kunita K, Fujiwara K. Influence of sports experience on distribution of pro-saccade reaction time under gap condition. J Physiol Anthropol 2022; 41:4. [PMID: 35081976 PMCID: PMC8793195 DOI: 10.1186/s40101-022-00277-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/12/2022] [Indexed: 11/23/2022] Open
Abstract
Background Previous studies indicated that substantial individual variation exists in the distribution of pro-saccade reaction times under gap condition. To investigate the influence of sports experience on the distribution, we examined distribution of the pro-saccade reaction time under overlap and gap conditions, for the basketball club, table tennis club, and non-sporting control groups. Methods Subjects performed pro-saccade tasks under the overlap and gap conditions, in which the intentional and reflexive disengagement of fixation are important, respectively. Under the overlap condition, the central fixation point was illuminated for a random duration of 1–3 s, then the fixation point was turned off. Just after the switch-off of the fixation point, one of the peripheral targets was illuminated for a duration of 1 s. The visual stimulus under the gap condition was almost the same as that under the overlap condition. However, only the temporal gap between the switch-off of the fixation point and the onset of the target differed between those conditions. The gap duration in the gap condition was set at 200 ms. The mean of median value of the bandwidth showing the earliest peak in the histogram was calculated for each group. Thereafter, for each subject, the bandwidth showing the earliest peak under the gap condition was defined as the criterion bandwidth (0 ms bandwidth). Based on this criterion bandwidth, the mean of the relative frequency was calculated for every 10 ms of bandwidth, for the overlap and gap conditions, in each group. Results Under the overlap condition, for all subjects, the pro-saccade reaction times showed unimodal distribution. The means of the median value of the bandwidth showing the earliest peak for the basketball and table tennis groups (approximate 170 ms) were significantly earlier than that for the control group (approximate 190 ms). Under the gap condition, the distribution was bimodal for 11 of 15 subjects in the basketball group and for 5 of 15 subjects in the control group. In the table tennis group, the distribution was not bimodal but unimodal for all 15 subjects. For the basketball group, mean of the relative frequency showed bimodal distribution with approximate 120 ms and 170 ms peaks. For the table tennis and control groups, the mean of the relative frequency showed unimodal distribution with approximate 130 ms and 140ms peak, respectively. Conclusions The present study indicated that under the gap condition, the sports experience influenced on the distribution of the pro-saccade reaction time. The pro-saccade reaction time under the condition would show a distinct bimodal distribution for the basketball group and show a distinct and early unimodal distribution for the table tennis group. It was suggested that the physiological factor leading the group difference in the distribution was the effect of sports experience on the disengagement function of fixation.
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Silva AF, Afonso J, Sampaio A, Pimenta N, Lima RF, Castro HDO, Ramirez-Campillo R, Teoldo I, Sarmento H, González Fernández F, Kaczmarek A, Oniszczuk A, Murawska-Ciałowicz E. Differences in visual search behavior between expert and novice team sports athletes: A systematic review with meta-analysis. Front Psychol 2022; 13:1001066. [PMID: 36211897 PMCID: PMC9536317 DOI: 10.3389/fpsyg.2022.1001066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/01/2022] [Indexed: 12/01/2022] Open
Abstract
Background For a long time, in sports, researchers have tried to understand an expert by comparing them with novices, raising the doubts if the visual search characteristics distinguish experts from novices. Therefore, the aim of the present study was to review and conduct a meta-analysis to evaluate the differences in visual search behavior between experts and novices in team sports athletes. Methods This systematic review with meta-analysis followed the PRISMA 2020 and Cochrane's guidelines. Healthy team athletes were included, which engaged in regular practice, from any sex or competitive level, specifically classified a priori as expert or novice in the original research (i.e., if they were classified after the experiment, based on one of the tests, the study would be excluded). We considered only research published in peer-reviewed journals, with no limitations regarding date or language. It was considered healthy team sport athletes engaged in regular practice. The scenarios could be in situ or film-based. The databases of EBSCO (Academic Search Complete, Academic Search Ultimate, APA PsycArticles, and APA PsycINFO), PubMed, Scopus, SPORTDiscus, and Web of Science were used to perform the searches. The risk of bias was calculated through the RoBANS tool. Results From a total of 6,257 records, of which 985 were duplicates, titles and abstracts of 5,272 were screened, and 45 required full-text analysis. Of those, 23 were excluded due to not fulfilling the eligibility criteria regarding participants. In the end, 22 studies were selected, however, as two studies were part of the same trial and were analyzed conjointly. Discussion Experts showed to be older and with more years of practice. The ability to distinguish experts from novices was not so clear regarding the variables analyzed. This could be due to the strategies chosen in each study, which were specific to each scenario, and when grouping all together, it was lost information within non-representative averages. The distinction between experts and novices was not clear, showing a lot of heterogeneity in the included studies. The expert classification itself may have been the conditioning aspect for these results, retaining the doubt and the need for more studies in the field. Systematic review registration The protocol was pre-registered in OSF (project https://osf.io/3j4qv/, register https://osf.io/dvk2n).
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Affiliation(s)
- Ana Filipa Silva
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal
- The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), Vila Real, Portugal
- Sport Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, Portugal
| | - José Afonso
- Faculty of Sport, Centre of Research, Education, Innovation, and Intervention in Sport (CIFI2D), University of Porto, Porto, Portugal
| | | | - Nuno Pimenta
- Sport Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, Portugal
- N2i, Polytechnic Institute of Maia, Maia, Portugal
| | - Ricardo Franco Lima
- Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal
- The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), Vila Real, Portugal
- Sport Performance, Recreation, Innovation and Technology (SPRINT), Melgaço, Portugal
| | | | - Rodrigo Ramirez-Campillo
- Department of Physical Activity Sciences, Universidad de Los Lagos, Santiago, Chile
- Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile
| | - Israel Teoldo
- Centre of Research and Studies in Soccer (NUPEF), Universidade Federal de Viçosa, Viçosa, Brazil
| | - Hugo Sarmento
- University of Coimbra, Research Unit for Sport and Physical Activity (CIDAF), Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | | | - Agnieszka Kaczmarek
- Department of Physiology and Biochemistry, University School of Physical Education, Wrocław, Poland
| | - Anna Oniszczuk
- Department of Physiology and Biochemistry, University School of Physical Education, Wrocław, Poland
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Topical Review: Perceptual-cognitive Skills, Methods, and Skill-based Comparisons in Interceptive Sports. Optom Vis Sci 2021; 98:681-695. [PMID: 34328450 DOI: 10.1097/opx.0000000000001727] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
SIGNIFICANCE We give a comprehensive picture of perceptual-cognitive (PC) skills that could contribute to performance in interceptive sports. Both visual skills that are low level and unlikely influenced by experience and higher-level cognitive-attentional skills are considered, informing practitioners for identification and training and alerting researchers to gaps in the literature.Perceptual-cognitive skills and abilities are keys to success in interceptive sports. The interest in identifying which skills and abilities underpin success and hence should be selected and developed is likely going to grow as technologies for skill testing and training continue to advance. Many different methods and measures have been applied to the study of PC skills in the research laboratory and in the field, and research findings across studies have often been inconsistent. In this article, we provide definitional clarity regarding whether a skill is primarily visual attentional (ranging from fundamental/low-level skills to high-level skills) or cognitive. We review those skills that have been studied using sport-specific stimuli or tests, such as postural cue anticipation in baseball, as well as those that are mostly devoid of sport context, considered general skills, such as dynamic visual acuity. In addition to detailing the PC skills and associated methods, we provide an accompanying table of published research since 1995, highlighting studies (for various skills and sports) that have and have not differentiated across skill groups.
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Properties of fast vergence eye movements and horizontal saccades in athletes. Physiol Behav 2021; 235:113397. [PMID: 33775660 DOI: 10.1016/j.physbeh.2021.113397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/19/2021] [Accepted: 03/21/2021] [Indexed: 11/20/2022]
Abstract
Visual information based on eye movements influences sports performance in 3-D space. The purpose of this study was to clarify the properties of fast vergence eye movements and horizontal saccades in athletes. Thirty-four college students were classified into three groups: twelve baseball players (BAS), ten track and field athletes (TRA) and twelve non-athletes (NON). The oculomotor tasks consisted of vergence eye movements (vergence task) including convergence and divergence, and horizontal saccades (saccade task). The participants made a rapid gaze shift toward a visual target. For the vergence task, the target was irradiated at 5 different vergence angles (3, 5, 10, 15, 20°) randomly. For the saccade task, the target was irradiated at 5 different saccade amplitudes (0, ±5, ±10°) randomly. The results showed that the peak eye velocity was higher in order of saccade, convergence, and divergence eye movements. The gain of convergence and saccades was higher than that of divergence. Furthermore, the latency of saccades was shorter than that of convergence and divergence. These results suggest that saccades and convergence are superior compared with divergence, and the dynamic property of convergence is partially analogous to horizontal saccades. The results of the comparison between the three groups showed that the latency of convergence was shorter for BAS than for NON. Therefore, different visual experience and baseball training could influence the gaze-shift dynamics during convergence eye movements.
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Shull PB, Zhu X, Cutkosky MR. Continuous Movement Tracking Performance for Predictable and Unpredictable Tasks with Vibrotactile Feedback. IEEE TRANSACTIONS ON HAPTICS 2017; 10:466-475. [PMID: 28368831 DOI: 10.1109/toh.2017.2689023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The purpose of this paper was to determine human movement tracking performance in response to vibrotactile feedback tracking for predictable and unpredictable continuous movement tasks. Thirteen subjects performed elbow flexion/extension and knee flexion/extension continuous movement tracking tasks while receiving tactile stimulation proportional to limb joint position error. Subjects followed 0.2-2.0 Hz desired movements for predictable tasks (single sinusoid) and unpredictable tasks (combination of three sinusoids). Tactile stimulation reaction times at the forearm to induce elbow flexion/extension and at the shank to induce knee flexion/extension were also recorded. Results of frequency tracking showed that 100 percent of participants correctly tracked unpredictable tasks at all frequencies, but only 60-80 percent of participants correctly tracked predictable tasks at frequencies less than 1 Hz and only 20-60 percent of participants correctly tracked predictable tasks at frequencies greater than 1 Hz. Subjects had less phase lag for predictable tasks than for unpredictable tasks. Reaction times at the forearm were 379 ms and at the shank 437 ms. These findings suggest that continuous vibrotactile feedback based on position errors may not be the most effective means of training higher frequency human movements and serve to inform future vibrotactile feedback design related to training human limb movements for predictable and unpredictable tasks.
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Wasserman EB, Abar B, Shah MN, Wasserman D, Bazarian JJ. Concussions are associated with decreased batting performance among Major League Baseball players. Am J Sports Med 2015; 43:1127-33. [PMID: 25784627 DOI: 10.1177/0363546515576130] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Concussions impair balance, visual acuity, and reaction time--all of which are required for high-level batting performance--but the effects of concussion on batting performance have not been reported. The authors examined this relationship between concussion and batting performance among Major League Baseball (MLB) players. HYPOTHESIS Batting performance among concussed MLB players will be worse upon return to play than batting performance among players missing time for noninjury reasons. STUDY DESIGN Cohort study; Level of evidence, 3. METHODS The authors identified MLB players who sustained a concussion between 2007 and 2013 through league disabled-list records and a Baseball Prospectus database. For a comparison group, they identified players who went on paternity or bereavement leave during the same period. Using repeated-measures generalized linear models, the authors compared 7 batting metrics between the 2 groups for the 2 weeks upon return, as well as 4 to 6 weeks after return, controlling for pre-leave batting metrics, number of days missed, and position. RESULTS The authors identified 66 concussions and 68 episodes of bereavement/paternity leave to include in the analysis. In the 2 weeks after return, batting average (.235 vs .266), on-base percentage (.294 vs .326), slugging percentage (.361 vs .423), and on-base plus slugging (.650 vs .749) were significantly lower among concussed players relative to the bereavement/paternity leave players (time×group interaction, P<.05). In weeks 4 to 6 after leave, these metrics were slightly lower in concussed players but not statistically significantly so. CONCLUSION Although concussed players may be asymptomatic upon return to play, the residual effects of concussion on the skills required for batting may still be present. Further work is needed to clarify the mechanism through which batting performance after concussion is adversely affected and to identify better measures to use for return-to-play decisions.
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Affiliation(s)
- Erin B Wasserman
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Emergency Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Beau Abar
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Emergency Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Manish N Shah
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Emergency Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Division of Geriatrics, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Daniel Wasserman
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Emergency Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Division of Geriatrics, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Physical Medicine & Rehabilitation, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester, New York, USAD.W. performed this work on his own time independent of any affiliation.Investigation performed at the University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Jeffrey J Bazarian
- Department of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Emergency Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Physical Medicine & Rehabilitation, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
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Jajtner AR, Hoffman JR, Scanlon TC, Wells AJ, Townsend JR, Beyer KS, Mangine GT, McCormack WP, Bohner JD, Fragala MS, Stout JR. Performance and Muscle Architecture Comparisons Between Starters and Nonstarters in National Collegiate Athletic Association Division I Women's Soccer. J Strength Cond Res 2013; 27:2355-65. [DOI: 10.1519/jsc.0b013e31829bd7c5] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jafarzadehpur E, Mirzajani A, Hatami M, Musavian R, Abbasi E. Comparison of Blue-Yellow Opponent Color Contrast Sensitivity Function between Female Badminton Players and Non-athletes. Asian J Sports Med 2013; 4:107-13. [PMID: 23802052 PMCID: PMC3690730 DOI: 10.5812/asjsm.34491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 11/28/2012] [Indexed: 12/02/2022] Open
Abstract
Purpose To compare the chromatic contrast sensitivity function (CSF) for the blue-yellow opponent channel (BYOC) between female badminton players and non-athlete controls. Methods We recruited 40 young females (18-25 years old) who played badminton for at least 5 consecutive years as the test group, and 30 age-matched female controls who had no history of regular physical activity. The Pattern Generator™ system was used to test the CSF for the BYOC which was performed at three spatial frequencies (SFs) of 2 cycles per degree (cpd), 5 cpd, and 25 cpd. Results Comparison of BYOC thresholds showed significantly better results in the test group for all three SFs (P<0.001). Band pass shift (better CSF in the middle SF) was seen in the test group. The control group had low pass (better CSF in the low SF). Ocular motility (heterophoria, fusional convergence and divergence at far and near distances, and near point of convergence) was better in the test group, but the inter-group difference was not significant. Conclusions The BYOC threshold results for badminton players indicated a better visual performance which may be a result of enhanced performance of the parallel processing of the parvocellular and magnocellular systems. This may be inherent and/or acquired in badminton players. In addition, badminton players appear to have developed sensory-motor programmed activities. Testing the CSF for BYOC may be useful for athlete selection in different levels and/or used as a criterion for screening players in the field of badminton.
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Affiliation(s)
- Ebrahim Jafarzadehpur
- Optometry Department, Tehran University of Medical Science, Tehran, Iran
- Noor Ophthalmology Research Center, Tehran, Iran
- Address: Rehabilitation Faculty, Optometry Department of Tehran University of Medical Science, Shahnazary St., Mohseni Square, Mirdamad Blvd, Tehran, Iran.
| | - Ali Mirzajani
- Optometry Department, Tehran University of Medical Science, Tehran, Iran
| | - Maryam Hatami
- Optometry Department, Tehran University of Medical Science, Tehran, Iran
| | - Razieh Musavian
- Optometry Department, Tehran University of Medical Science, Tehran, Iran
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Wimshurst ZL, Sowden PT, Cardinale M. Visual Skills and Playing Positions of Olympic Field Hockey Players. Percept Mot Skills 2012; 114:204-16. [PMID: 22582689 DOI: 10.2466/05.22.24.pms.114.1.204-216] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Many sports require fine spatiotemporal resolution for optimal performance. Previous studies have compared anticipatory skills and the decision-making process in athletes; however, there is little information on visual skills of elite athletes, particularly hockey players. To assess visual skills of Olympic hockey players and analyze differences by playing position, and to analyze improvement of visual skills after training, 21 Olympic field hockey players were pre- and post-tested on 11 visual tasks following a 10-wk. visual training program consisting of computer-based visual exercises. There were no mean differences at pre-test between players of different positions, suggesting that performance on these visual skills was independent of playing position. However, after training, an improvement was seen in all players (when scores were averaged across all 11 visual tasks) with goalkeepers improving significantly more than any other position. This suggests the possibility of improving visual skills even in an elite population.
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Affiliation(s)
- Z. L. Wimshurst
- University of Surrey, British Olympic Medical Institute, London, Division of Surgical and Interventional Medicine, University College London
| | | | - M. Cardinale
- British Olympic Medical Institute, London, Division of Surgical and Interventional Medicine, University College London, School of Medical Science, University of Aberdeen
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