scholarly journals Performance Effects of Repetition Specific Gluteal Activation Protocols on Acceleration in Male Rugby Union Players

2016 ◽  
Vol 54 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Lorna Barry ◽  
Ian Kenny ◽  
Thomas Comyns
Keyword(s):  
Repeated Measures ◽  
Rugby Union ◽  
Response Analysis ◽  
Individual Response ◽  
Rest Interval ◽  
Post Intervention ◽  
Warm Up ◽  
Dual Beam ◽  
Intervention Protocol ◽  
The Individual

Abstract Warm-up protocols have the potential to cause an acute enhancement of dynamic sprinting performance. The purpose of this study was to evaluate the effects of three repetition specific gluteal activation warm-up protocols on acceleration performance in male rugby union players. Forty male academy rugby union players were randomly assigned to one of 4 groups (control, 5, 10 or 15 repetition gluteal activation group) and performed 10 m sprints at baseline and 30 s, 2, 4, 6 and 8 min after their specific intervention protocol. Five and ten meter sprint times were the dependent variable and dual-beam timing gates were used to record all sprint times. Repeated measures analysis of variance found no significant improvement in 5 and 10 m sprint times between baseline and post warm-up scores (p ≥ 0.05) for all groups. There were no reported significant differences between groups at any of the rest interval time points (p ≥ 0.05). However, when individual responses to the warm-up protocols were analyzed, the 15 repetition gluteal activation group had faster 10 m times post-intervention and this improvement was significant (p = 0.021). These results would indicate that there is no specific rest interval for any of the gluteal interventions that results in a potentiation effect on acceleration performance. However, the individual response analysis would seem to indicate that a 15 repetition gluteal activation warm-up protocol has a potentiating effect on acceleration performance provided that the rest interval is adequately and individually determined.

scholarly journals Effects of Pre-Activation with Variable Intra-Repetition Resistance on Throwing Velocity in Female Handball Players: A Methodological Proposal

2021 ◽  
Vol 77 (1) ◽  
pp. 235-244
Author(s):  
Darío Martínez-García ◽  
Ángela Rodríguez-Perea ◽  
Álvaro Huerta-Ojeda ◽  
Daniel Jerez-Mayorga ◽  
Daniel Aguilar-Martínez ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Repeated Measures ◽  
Initial Velocity ◽  
Acute Effect ◽  
Rest Interval ◽  
Maximum Voluntary Isometric Contraction ◽  
Variable Resistance ◽  
Ball Velocity ◽  
The Mean ◽  
The Individual

Abstract The purpose of this study was to investigate the acute effect of pre-activation with Variable Intra-Repetition Resistance and isometry on the overhead throwing velocity in handball players. Fourteen female handball players took part in the study (age: 21.2 ± 2.7 years, experience: 10.9 ± 3.5 years). For Post-Activation Potentiation, two pre-activation methods were used: (I) Variable Intra-Repetition Resistance: 1 x 5 maximum repetitions at an initial velocity of 0.6 m·s-1 and a final velocity of 0.9 m·s-1; (II) Isometry: 1 x 5 s of maximum voluntary isometric contraction. Both methods were "standing unilateral bench presses" with the dominant arm, using a functional electromechanical dynamometer. The variable analysed was the mean of the three overhead throws. Ball velocity was measured with a radar (Stalker ATS). The statistical analysis was performed using ANOVA with repeated measures. No significant differences were found for either method (variable resistance intra-repetition: p = 0.194, isometry: p = 0.596). Regarding the individual responses, the analysis showed that 86% of the sample increased throwing velocity with the variable resistance intra-repetition method, while 93% of the sample increased throwing velocity with the isometric method. Both the variable intra-repetition resistance and isometric methods show improvements in ball velocity in female handball players. However, the authors recommend checking individual responses, since the results obtained were influenced by the short rest interval between the pre-activation and the experimental sets.

Can Previewing Sport-Specific Video Influence Reactive-Agility Response Time?

2017 ◽  
Vol 12 (2) ◽  
pp. 224-229 ◽  
Author(s):  
Ryan Holding ◽  
Rudi Meir ◽  
Shi Zhou
Keyword(s):  
Response Time ◽  
Learning Strategies ◽  
Repeated Measures ◽  
Response Times ◽  
Rugby Union ◽  
Control Group ◽  
Warm Up ◽  
3D Motion Analysis ◽  
Reactive Agility ◽  
Analysis System

The purpose of this study was to examine whether a video-based warm-up could provide an acute performance benefit to response time for athletes in a sport-specific agility task. In addition, 2 learning strategies, explicit and implicit, were compared for their effectiveness in facilitating an improvement in sport-specific agility. Thirty representative male junior rugby union players (age 14–16 y, mean age 14.6 ± 1.09 y) were placed in 3 experimental groups (explicit, implicit, and control) and completed 2 intervention sessions. Testing sessions included preintervention testing, completion of the video-based warm-up intervention, and postintervention testing. A 3D motion-analysis system was used to assess response time in the testing battery. The athletes’ response times on the pre- to postintervention tests were compared to determine the effectiveness of the video-based warm-up. A 2-way general linear model with repeated-measures analysis indicated that both the explicit (P = .030, d = 0.28) and implicit (P = .049, d = 0.33) groups significantly improved their response time by the intervention compared with the control group (P = .367, d = 0.08). The mean postintervention response time for the explicit group improved by 19.1% (from 0.246 s pre to 0.199 s post), and the implicit group improved by 15.7% (from 0.268 s to 0.226 s). Findings suggest that a video-based warm-up may provide an acute benefit to sport-specific agility performance for junior athletes.

scholarly journals Effects of Open (Racket) and Closed (Running) Skill Sports Practice on Children’s Attentional Performance

2020 ◽  
Vol 13 (1) ◽  
pp. 105-113
Author(s):  
Maria Chiara Gallotta ◽  
Valerio Bonavolontà ◽  
Giovanna Zimatore ◽  
Sara Iazzoni ◽  
Laura Guidetti ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Training Session ◽  
Lower Percentage ◽  
Specific Training ◽  
Post Intervention ◽  
Sport Practice ◽  
Attentional Performance ◽  
Improved Performance ◽  
The Individual ◽  
And Training

Aims: The first aim of the study was to examine the attentional performance of children (8–13 years of age) who practiced two different sport disciplines: Open skill sport – racket and closed skill sport – running and also to investigate the acute effects of these two specific training sessions on children’s immediate and delayed attentional performance. The second aim of the present study was to verify gender differences in attentional performance. Eighteen children+ (8 girls and 10 boys; age = 10.6 ± 1.5 yrs; height = 144.3 ± 12.2 cm; weight = 44.2 ± 12.5 kg; BMI = 20.8 ± 2.7 kg/m2) engaged in a racket sports and eighteen children (9 girls and 9 boys; age = 9.9 ± 1.2 yrs; height = 142.4 ± 9.5 cm; weight = 40.0 ± 8.6 kg; BMI = 19.6 ± 2.4 kg/m2) engaged in running were enrolled. Methods: Children’s training and experience with these activities averaged 2.3 (± 1.0) years. Children’s attentional capacity was measured before, immediately after and 50 minutes after each specific training session by the d2 test of attention. This paper -and -pencil letter cancellation test evaluated concentration and sustained attention under stress induced by a fixed executing time. A 2 (Sport: open vs closed skill) x 2 (Gender: boys vs girls) x 3 (Time: pre vs 0’ post vs 50’ post) repeated measures ANOVA for time was used to compare the effect of an open skill session and a closed skill session on the individual attentional variables. Results: Children of open skill sport showed higher attentional scores (higher processing speed - TN, higher concentration performance - CP and lower percentage of errors - E%; p < 0.01), improved CP from pre to 0’ post intervention (p = 0.01) and maintained this improved performance at 50’ post intervention (50’ post vs pre; p < 0.01), and decreased E% from pre to 0’ post intervention (p = 0.01) and maintained this improvement at 50’ post intervention (50’ post vs pre; p < 0.001). Children of closed skill sport significantly decreased their CP from pre to 50’ post intervention (50’ post vs pre; p = 0.001 and 50’ post vs 0’ post; p < 0.0001) and worsened their E% across the time (50’ post vs pre; p = 0.001 and 50’ post vs 0’ post; p < 0.0001). Boys showed significantly higher TN values than girls only in closed skill sport (p = 0.023). Finally, all girls of both open and closed skill sports significantly improved their CP from pre to 0’ post intervention (p = 0.04). Conclusion: Results of the study showed that open skill sport practice and training session positively affects children’s attentional performance.

scholarly journals Post-Activation Potentiation on Squat Jump Following Two Different Protocols: Traditional vs. Inertial Flywheel

2019 ◽  
Vol 69 (1) ◽  
pp. 271-281 ◽  
Author(s):  
Rafael Timon ◽  
Silvia Allemano ◽  
Marta Camacho-Cardeñosa ◽  
Alba Camacho-Cardeñosa ◽  
Ismael Martinez-Guardado ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Rest Interval ◽  
Significant Interaction Effect ◽  
Jump Performance ◽  
Physically Active ◽  
Squat Jump ◽  
Warm Up ◽  
Squat Exercise ◽  
Eccentric Actions ◽  
Effect Time

Abstract Post‐activation potentiation (PAP) has been defined as a major enhancement of muscular performance following a preload stimulus. The eccentric actions seem to cause a potentiating effect on subsequent explosive exercises. The aim of this study was to determine whether a protocol of squat exercise using an inertial flywheel could have a potentiating effect on jump performance. Sixteen physically active volunteers participated in the study (age: 21.8 ± 2.7 years; body mass index: 23.6 ± 3). All participants completed two different protocols on separate days: a Traditional Protocol (using a half squat with a guided barbell) and an Inertial Flywheel Protocol (using a half squat with an inertial flywheel). Both protocols were similar and consisted of 3 x 6 reps at the load that maximized power, with a 3‐minute rest interval between sets. The squat jump (SJ) was measured by a contact platform at baseline, and four, eight and twelve minutes after the PAP stimulus. A two‐way ANOVA with repeated measures was performed to analyze significant differences over time. There were significant increases of SJ height (p = 0.004, d = 0.665), velocity (p = 0.003, d = 0.688) and power (p = 0.004, d = 0.682) from baseline after the inertial flywheel protocol. A significant interaction effect (time x protocol) was observed, showing that the inertial flywheel protocol had a potentiating effect on the jump performance compared to the traditional protocol, more specifically at 4 and 8 minutes after the PAP stimulus. In conclusion, the inertial flywheel protocol showed a potentiating effect on the squat jump performance, thus this pre‐ conditioning activity could be useful during the warm‐up before the competition.

Effect of catechol-O-methyltransferase Val(108/158)Met polymorphism on antidepressant efficacy of fluvoxamine

2010 ◽  
Vol 25 (8) ◽  
pp. 476-478 ◽  
Author(s):  
F. Benedetti ◽  
S. Dallaspezia ◽  
C. Colombo ◽  
C. Lorenzi ◽  
A. Pirovano ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Plasma Levels ◽  
Repeated Measures ◽  
Individual Response ◽  
Antidepressant Response ◽  
Major Depressive ◽  
Factors Affecting ◽  
Antidepressant Efficacy ◽  
Drug Plasma Levels ◽  
The Individual

AbstractRationaleThe catechol-O-methyltransferase (COMT) enzyme inactivates catecholamines, and the COMT Val(108/158)Met polymorphism (rs4680) influences the enzyme activity. Recent clinical studies found a significant effect of rs4680 on antidepressant response to fluoxetine and paroxetine, but several other studies were negative. No study considered drug plasma levels as possible nuisance covariate.ObjectivesWe studied the effect of rs4680 on response to fluvoxamine antidepressant monotherapy.Patients and methodsForty-one consecutively admitted inpatients affected by a major depressive episode in course of major depressive disorder were administered fluvoxamine for 6 weeks. Changes in severity of depression were assessed with weekly Hamilton Depression ratings and analyzed with repeated measures ANOVA in the context of General Linear Model, with rs4680 and fluvoxamine plasma levels as factors.Resultsrs4680 significantly interacted with time in affecting antidepressant response to fluvoxamine, with outcome being inversely proportional to the enzyme activity: better effects in Met-carriers, worse effects in Val/Val homozygotes. The effect became significant at the fourth week of treatment, and influence final response rates. Fluvoxamine plasma levels had marginal effects on outcome.ConclusionsThis is the first study that reports a positive effect of rs4680 on response to fluvoxamine, and the third independent report of its influence on response to selective 5-HT reuptake inhibitors (SSRIs). Our findings support the hypothesis that factors affecting catecholaminergic neurotransmission might contribute to shape the individual response to antidepressants irrespective of their primary molecular target.

scholarly journals Effects of 4 Weeks of a Technique-Specific Protocol with High-Intensity Intervals on General and Specific Physical Fitness in Taekwondo Athletes: An Inter-Individual Analysis

2021 ◽  
Vol 18 (7) ◽  
pp. 3643
Author(s):  
Alex Ojeda-Aravena ◽  
Tomás Herrera-Valenzuela ◽  
Pablo Valdés-Badilla ◽  
Jorge Cancino-López ◽  
José Zapata-Bastias ◽  
...  
Keyword(s):  
Body Composition ◽  
Physical Fitness ◽  
High Intensity ◽  
Female Athletes ◽  
Interval Training ◽  
Control Group ◽  
Individual Response ◽  
Post Intervention ◽  
Time Interaction ◽  
Specific Protocol

The aim of this research was to compare the effects of a technique-specific high-intensity interval training (HIIT) protocol vs. traditional taekwondo training on physical fitness and body composition in taekwondo athletes, as well as to analyse the inter-individual response. Utilising a parallel controlled design, sixteen male and female athletes (five females and 11 males) were randomly divided into an experimental group (EG) that participated in the technique-specific HIIT and a control group (CG) that participated in traditional taekwondo training. Both groups trained three days/week for four weeks. Squat jump (SJ), countermovement jump (CMJ), 5-metre sprint (5M), 20-metre shuttle run (20MSR), taekwondo specific agility test (TSAT), multiple frequency speed of kick test (FSKTMULT), total kicks, and kick decrement index (KDI), as well as body composition were evaluated. Results indicate that there are no significant differences (p > 0.05) in the factors group and time factor and group by time interaction (p > 0.05). Although percentage and effect size increases were documented for post-intervention fitness components in TSAT, total kicks, KDI, and 20MSR, responders and non-responders were also documented. In conclusion, a HIIT protocol based on taekwondo-specific technical movements does not report significant differences in fitness and body composition compared to traditional taekwondo training, nor inter-individual differences between athletes.

scholarly journals Boxing vs Sensory Exercise for Parkinson’s Disease: A Double-Blinded Randomized Controlled Trial

2021 ◽  
pp. 154596832110231
Author(s):  
Kishoree Sangarapillai ◽  
Benjamin M. Norman ◽  
Quincy J. Almeida
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Randomized Controlled Trial ◽  
Repeated Measures ◽  
Rating Scale ◽  
Controlled Trial ◽  
Motor Symptoms ◽  
Post Intervention ◽  
Randomized Controlled ◽  
Double Blinded

Background. Exercise is increasingly becoming recognized as an important adjunct to medications in the clinical management of Parkinson’s disease (PD). Boxing and sensory exercise have shown immediate benefits, but whether they continue beyond program completion is unknown. This study aimed to investigate the effects of boxing and sensory training on motor symptoms of PD, and whether these benefits remain upon completion of the intervention. Methods. In this 20-week double-blinded randomized controlled trial, 40 participants with idiopathic PD were randomized into 2 treatment groups, (n = 20) boxing or (n = 20) sensory exercise. Participants completed 10 weeks of intervention. Motor symptoms were assessed at (week 0, 10, and 20) using the Unified Parkinson’s Disease Rating Scale (UPDRS-III). Data were analyzed using SPSS, and repeated-measures ANOVA was conducted. Results. A significant interaction effect between groups and time were observed F(1, 39) = 4.566, P = .036, where the sensory group improved in comparison to the boxing group. Post hoc analysis revealed that in comparison to boxing, the effects of exercise did not wear off at washout (week 20) P < .006. Conclusion. Future rehabilitation research should incorporate similar measures to explore whether effects of exercise wear off post intervention.

scholarly journals Factors associated to functioning and health in relation to home rehabilitation in Sweden: a non-randomized pre-post intervention study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Anette Johansson ◽  
Marie Ernsth Bravell ◽  
Eleonor I. Fransson ◽  
Sofi Fristedt
Keyword(s):  
Repeated Measures ◽  
Linear Models ◽  
Medical Condition ◽  
Rehabilitation Program ◽  
Community Dwelling ◽  
Rehabilitation Service ◽  
Post Intervention ◽  
Factors Associated ◽  
Rehabilitation Outcomes ◽  
Self Rated Health

Abstract Background Home rehabilitation is a growing rehabilitation service in many countries, but scientific knowledge of its components and outcomes is still limited. The aim of this study was to investigate; 1) which changes in functioning and self-rated health could be identified in relation to a home rehabilitation program in a population of community-dwelling citizens, and 2) how socio-demographic factors, health conditions and home rehabilitation interventions were associated to change in functioning and self-rated health after the home rehabilitation program. Method The sample consisted of participants in a municipal home rehabilitation project in Sweden and consisted of 165 community-dwelling citizens. General Linear Models (ANOVA repeated measures) was used for identifying changes in rehabilitation outcomes. Logistic regressions analysis was used to investigate associations between rehabilitation outcomes and potential factors associated to outcome. Result Overall improvements in functioning and self-rated health were found after the home rehabilitation program. Higher frequencies of training sessions with occupational therapists, length of home rehabilitation, and orthopaedic conditions of upper extremities and spine as the main health condition, were associated with rehabilitation outcomes. Conclusion The result indicates that the duration of home rehabilitation interventions and intensity of occupational therapy, as well as the main medical condition may have an impact on the outcomes of home rehabilitation and needs to be considered when planning such programs. However, more research is needed to guide practice and policymaking.

Pilot evaluation of a group stabilisation intervention for refugees and asylum seekers with PTSD

2021 ◽  
pp. 1-6
Author(s):  
Mary Griggs ◽  
Cheng Liu ◽  
Kate Cooper
Keyword(s):  
Repeated Measures ◽  
Asylum Seekers ◽  
Preliminary Evidence ◽  
Behavioural Therapy ◽  
Post Traumatic Stress ◽  
Group Setting ◽  
Post Intervention ◽  
Treatment Delivery ◽  
Cognitive Behavioural ◽  
The Uk

Abstract Background: Post-traumatic stress disorder (PTSD) is commonly experienced by asylum seekers and refugees (ASR). Evidence supports the use of cognitive behavioural therapy-based treatments, but not in group format for this population. However, group-based treatments are frequently used as a first-line intervention in the UK. Aims: This study investigated the feasibility of delivering a group-based, manualised stabilisation course specifically developed for ASR. The second aim was to evaluate the use of routine outcome measures (ROMs) to capture psychological change in this population. Method: Eighty-two participants from 22 countries attended the 8-session Moving On After Trauma (MOAT) group-based stabilisation treatment. PHQ-9, GAD-7, IES-R and idiosyncratic outcomes were administered pre- and post-intervention. Results: Seventy-one per cent of participants (n = 58) attended five or more of the treatment sessions. While completion rates of the ROMs were poor – measures were completed at pre- and post-intervention for 46% participants (n = 38) – a repeated-measures MANOVA indicated significant improvements in depression (p = .001, ηp2 = .262), anxiety (p = .000, ηp2 = .390), PTSD (p = .001, ηp2 = .393) and idiosyncratic measures (p = .000, ηp2 = .593) following the intervention. Conclusions: Preliminary evidence indicates that ASR who attended a low-intensity, group-based stabilisation group for PTSD experienced lower mental health scores post-group, although the lack of a comparison group means these results should be interpreted with caution. There are significant challenges in administering ROMs to individuals who speak many different languages, in a group setting. Nonetheless, groups have benefits including efficiency of treatment delivery which should also be considered.

scholarly journals Spectral Pitch Similarity is a Predictor of Perceived Change in Sound- as Well as Note-Based Music

2019 ◽  
Vol 2 ◽  
pp. 205920431984735
Author(s):  
Roger T. Dean ◽  
Andrew J. Milne ◽  
Freya Bailes
Keyword(s):  
Time Series ◽  
Piano Music ◽  
Individual Response ◽  
Discrete Events ◽  
Acoustic Intensity ◽  
Spectral Parameters ◽  
Cross Sectional ◽  
Perceived Change ◽  
Predictive Role ◽  
The Individual

Spectral pitch similarity (SPS) is a measure of the similarity between spectra of any pair of sounds. It has proved powerful in predicting perceived stability and fit of notes and chords in various tonal and microtonal instrumental contexts, that is, with discrete tones whose spectra are harmonic or close to harmonic. Here we assess the possible contribution of SPS to listeners’ continuous perceptions of change in music with fewer discrete events and with noisy or profoundly inharmonic sounds, such as electroacoustic music. Previous studies have shown that time series of perception of change in a range of music can be reasonably represented by time series models, whose predictors comprise autoregression together with series representing acoustic intensity and, usually, the timbral parameter spectral flatness. Here, we study possible roles for SPS in such models of continuous perceptions of change in a range of both instrumental (note-based) and sound-based music (generally containing more noise and fewer discrete events). In the first analysis, perceived change in three pieces of electroacoustic and one of piano music is modeled, to assess the possible contribution of (de-noised) SPS in cooperation with acoustic intensity and spectral flatness series. In the second analysis, a broad range of nine pieces is studied in relation to the wider range of distinctive spectral predictors useful in previous perceptual work, together with intensity and SPS. The second analysis uses cross-sectional (mixed-effects) time series analysis to take advantage of all the individual response series in the dataset, and to assess the possible generality of a predictive role for SPS. SPS proves to be a useful feature, making a predictive contribution distinct from other spectral parameters. Because SPS is a psychoacoustic “bottom up” feature, it may have wide applicability across both the familiar and the unfamiliar in the music to which we are exposed.

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