Postural stability, clicker reaction time and bow draw force predict performance in elite recurve archery

2017 ◽  
Vol 17 (5) ◽  
pp. 539-545 ◽  
Author(s):  
Wayne Spratford ◽  
Rhiannon Campbell
Keyword(s):  
Reaction Time ◽  
Postural Stability ◽  
Draw Force

Exercise improves gait, reaction time and postural stability in older adults with type 2 diabetes and neuropathy

2014 ◽  
Vol 28 (5) ◽  
pp. 715-722 ◽  
Author(s):  
Steven Morrison ◽  
Sheri R. Colberg ◽  
Henri K. Parson ◽  
Aaron I. Vinik
Keyword(s):  
Type 2 Diabetes ◽  
Older Adults ◽  
Reaction Time ◽  
Postural Stability

scholarly journals Physical, physiological and psychological profiles of elite Turkish taekwondo athletes

2020 ◽  
Vol 12 (1) ◽  
pp. 187-196
Author(s):  
Hadi Nabizadeh Khayyat ◽  
Sibel Güler Sağır ◽  
Özkan Hataş ◽  
Marcin Smolarczyk ◽  
Cengiz Akalan
Keyword(s):  
Reaction Time ◽  
Postural Stability ◽  
Vertical Jump ◽  
Stability Index ◽  
Peak Torque ◽  
Mood States ◽  
Psychological Characteristics ◽  
Mental Skills ◽  
Shuttle Run ◽  
Isokinetic Peak Torque

SummaryStudy aim: To identify the physical, physiological and psychological profiles of elite Turkish taekwondo athletes.Material and methods: Twelve players of the Turkish national taekwondo team (age = 22.7 ± 2.8 years, BMI = 22.2 ± 1.4 kg/m2, body fat = 12.8 ± 3.4%) participated in the study. Anthropometric measurements including leg length and foot size were assessed. Maximal oxygen uptake, explosive power of leg extensors, isokinetic peak torque, muscular endurance, anaerobic power, agility, flexibility, maximal speed, reaction time, and postural balance were examined by incremental treadmill running, vertical jump, isokinetic strength, sit-ups and push-ups, Wingate, shuttle run, sit-and-reach, 30-meter sprint, multiple-choice reaction time, and General Postural Stability and Athlete Single Leg stability tests, respectively. Psychological characteristics including mental skills and mood states were evaluated using OMSAT-3 and POMS tests.Results: VO2max, isokinetic peak torque and Wingate test mean power values were 54.1 ± 4.4 mL ∙ kg−1 ∙ min−1, 191.7 ± 19.2 N ∙ m, and 9 ± 0.7 W/kg, respectively. Postural stability index 0.18 ± 0.06, single leg stability index 0.82 ± 0.11, reaction time 0.344 ± 0.032 s, 10 × 5-m shuttle run 17.09 ± 0.68 s, 30-meter sprint 4.60 ± 0.23 s, and vertical jump 43.5 ± 6.1 cm were the other values reported. The highest scores for the 12 mental skills in OMSAT-3 were for goal setting (6.25 ± 0.45) and self-confidence (6.16 ± 0.45). The lowest score was for Imagery (5.64 ± 0.36). The results of six mood states of POMS showed higher scores on the Vigor-activity, Anger-Hostility and Tension-Anxiety scales and lower scores on Depression-Dejection, Fatigue-Inertia and Confusion-Bewilderment than norms.Conclusions: The findings of this study revealed the physical, physiological, and psychological characteristics in taekwondo. The results of the tests could be useful for performance assessment of taekwondo players.

The Influence of Ankle Taping on Changes in Postural Stability during Soccer-Specific Activity

2009 ◽  
Vol 18 (4) ◽  
pp. 482-492 ◽  
Author(s):  
Monika Lohkamp ◽  
Simon Craven ◽  
Colin Walker-Johnson ◽  
Matt Greig
Keyword(s):  
Reaction Time ◽  
Postural Stability ◽  
Outcome Measure ◽  
Prolonged Exposure ◽  
Specific Activity ◽  
Plantar Flexion ◽  
Match Play ◽  
Main Outcome Measure ◽  
And Inversion ◽  
Treadmill Protocol

Context:Postural stability diminishes with longer activity, which may increase the risk of injury. Tape can increase stability, but this effect diminishes after exercise.Objective:To investigate the influence of ankle taping on postural stability during soccer-specific activity.Participants:10 male, injury-free, semiprofessional soccer players.Intervention:A 45-min treadmill protocol replicating the activity profile of soccer match play—with and without ankle tape. Postural stability was assessed every 7.5 min, requiring response to sudden ankle plantar flexion and inversion during single-leg stance.Main Outcome Measure:Reaction time to perturbation and center- of-gravity (CoG) displacement.Results:Reaction time was significantly longer (P < .05) with longer exercise for both movements and conditions. No significant effect was evident in CoG displacement. For both outcome measures a nonsignificant benefit of taping was observed during the first 22.5 min of activity.Conclusion:Prolonged exposure to soccer-specific activity negates any beneficial effect of taping in improving postural stability.

Utility of a Postural Stability/Perceptual Inhibition Dual Task for Identifying Concussion in Adolescents

2021 ◽  
pp. 1-6
Author(s):  
Shawn R. Eagle ◽  
Patrick J. Sparto ◽  
Cynthia L. Holland ◽  
Abdulaziz A. Alkathiry ◽  
Nicholas A. Blaney ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Reaction Time ◽  
Dual Task ◽  
Postural Stability ◽  
Postural Sway ◽  
Area Under The Curve ◽  
Spatial Discrimination ◽  
Discriminative Ability ◽  
Visual Spatial ◽  
Time Accuracy

Context: Research in the area of dual-task paradigms to assess sport-related concussion (SRC) status is growing, but additional assessment of this paradigm in adolescents is warranted. Design: This case-control study compared 49 adolescent athletes aged 12–20 years with diagnosed SRC to 49 age- and sex-matched controls on visual–spatial discrimination and perceptual inhibition (PIT) reaction time tasks performed while balancing on floor/foam pad conditions. Methods: The SRC group completed measures at a single time point between 1 and 10 days postinjury. Primary outcomes were dual-task reaction time, accuracy, and sway. General linear models evaluated differences between groups (P < .05). Logistic regression identified predictors of concussion from outcomes. Area under the curve evaluated discriminative ability of identifying SRC. Results: Results supported significantly higher anterior–posterior (AP) sway values in concussed participants for visual–spatial discrimination and PIT when balancing on the floor (P = .03) and foam pad (P = .03), as well as mediolateral sway values on the floor during visual–spatial discrimination (P = .01). Logistic regression analysis (R2 = .15; P = .001) of all dual-task outcomes identified AP postural sway during the PIT foam dual task as the only significant predictor of concussed status (ß = −2.4; P = .004). Total symptoms (area under the curve = 0.87; P < .001) and AP postural sway on foam (area under the curve = 0.70; P = .001) differentiated concussed from controls. Conclusion: The AP postural sway on foam during a postural stability/PIT dual task can identify concussion in adolescents between 1 and 10 days from injury.

Relationship between Mental Rotation of Body Parts and Postural Stability during Quiet Stance

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Tsubasa Kawasaki ◽  
Kazuhiro Yasuda ◽  
Kazunobu Fukuhara ◽  
Takahiro Higuchi
Keyword(s):  
Reaction Time ◽  
Mental Rotation ◽  
Postural Stability ◽  
Postural Sway ◽  
Reaction Times ◽  
Body Parts ◽  
Quiet Stance ◽  
Mean Velocity ◽  
Unipedal Standing ◽  
Posterior Direction

AbstractThe present study was designed to investigate a relationship between the ability to quickly perform a mental rotation (MR) task using body (particularly foot) stimuli and postural stability during unipedal and bipedal quiet stance. Twenty-four healthy young adults participated in this study to measure reaction times for the MR (stimuli: foot, hand, and car), postural sway values during unipedal and bipedal standings, and lower extremity functions. Results showed significant correlations between the reaction time for the MR of the foot stimuli (but not for hand and car stimuli) and some of postural sway values (total length of sway and mean velocity in the anterior–posterior direction) during unipedal standing (but not for bipedal standing). Consistently, participants who performed the MR task quickly showed significantly smaller sway values during unipedal standing than those who performed the task slowly. These findings suggest that the ability to mentally imagine the foot movement is likely to relate to postural stability, while involving a challenging postural task, such as unipedal standing. The reaction time for the MR of foot stimuli was also correlated with two-point discrimination (TPD) distance on the plantar skin. Given that the TPD distance not only represents cutaneous acuity but also reflects participants’ body image relating to their feet, MR performance may have been related to postural stability because both involve cognitive processes used for both motor imagery and motor execution of the foot movement.

REACTION TIME AND INTELLIGENCE

1991 ◽  
Vol 1 (1) ◽  
pp. 211-221 ◽  
Author(s):  
Edward Neçka
Keyword(s):  
Reaction Time

Modeling Within-Person Variance in Reaction Time Data of Older Adults

GeroPsych ◽  
2011 ◽  
Vol 24 (4) ◽  
pp. 169-176 ◽  
Author(s):  
Philippe Rast ◽  
Daniel Zimprich
Keyword(s):  
Reaction Time ◽  
Cognitive Aging ◽  
Reaction Times ◽  
Reaction Time Task ◽  
Reaction Time Data ◽  
Scale Model ◽  
Time Data ◽  
Time Task ◽  
The Mean ◽  
Second Wave

In order to model within-person (WP) variance in a reaction time task, we applied a mixed location scale model using 335 participants from the second wave of the Zurich Longitudinal Study on Cognitive Aging. The age of the respondents and the performance in another reaction time task were used to explain individual differences in the WP variance. To account for larger variances due to slower reaction times, we also used the average of the predicted individual reaction time (RT) as a predictor for the WP variability. Here, the WP variability was a function of the mean. At the same time, older participants were more variable and those with better performance in another RT task were more consistent in their responses.

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