scholarly journals Effect of Plyometric Training on Speed and Change of Direction Ability in Elite Field Hockey Players

2018 ◽  
Author(s):  
Jasdev Singh ◽  
Brendyn B Appleby ◽  
Andrew P Lavender
Keyword(s):  
Repeated Measures ◽  
Controlled Trial ◽  
Plyometric Training ◽  
Field Hockey ◽  
Performance Variables ◽  
Change Of Direction ◽  
Jump Exercise ◽  
Parallel Group ◽  
Repeated Measures Analysis ◽  
Hockey Players

This study investigated the effects of two plyometric training protocols on sprint and change of direction (COD) performance in elite hockey players. A parallel-group randomized controlled trial design was used and seventeen elite male and female field hockey players were randomly allocated into either low-to-high (L-H, n = 8) or high-to-low (H-L, n = 9) training groups. Each group performed separate variations of the drop jump exercise twice weekly for six weeks, with an emphasis on either jump height (L-H) or drop height (H-L). Performance variables assessed included sprint times over 10 m and 20 m, as well as 505 time. A two-way repeated measures analysis of variance was performed and Cohen’s d effect sizes were calculated. The H-L group displayed significant small ES improvement from baseline to post-training in the 10 m sprint (1.893 ± 0.08 s pre vs 1.851 ± 0.06 s post) (ES = −0.44) (P = <0.05). Small but not statistically significant differences between groups were observed for 10 m and 20 m sprint performance, and no significant differences were observed within or between groups for 505 time. These findings highlight the difficulty in substantially enhancing speed and COD ability in highly trained athletic populations through the addition of a low volume, short duration plyometric training protocol.

scholarly journals Effect of Plyometric Training on Speed and Change of Direction Ability in Elite Field Hockey Players

Sports ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 144 ◽  
Author(s):  
Jasdev Singh ◽  
Brendyn Appleby ◽  
Andrew Lavender
Keyword(s):  
Repeated Measures ◽  
Controlled Trial ◽  
Statistical Significance ◽  
Plyometric Training ◽  
Field Hockey ◽  
Performance Variables ◽  
Change Of Direction ◽  
Jump Exercise ◽  
Parallel Group ◽  
Hockey Players

This study investigated the effects of two plyometric training protocols on sprint and change of direction (COD) performance in elite hockey players. A parallel-group randomized controlled trial design was used and seventeen elite male and female field hockey players were randomly allocated into either low-to-high (L-H, n = 8) or high-to-low (H-L, n = 9) training groups. Each group performed separate variations of the drop jump exercise twice weekly for six weeks, with an emphasis on either jump height (L-H) or drop height (H-L). Performance variables assessed included sprint times over 10 m and 20 m, as well as 505 time. A two-way repeated measures analysis of variance was performed and Cohen’s d effect sizes (ESs) were calculated. The H-L group displayed a significant small ES improvement from baseline to post-training in the 10 m sprint (1.893 ± 0.08 s pre vs. 1.851 ± 0.06 s post) (ES = −0.44) (p < 0.05). Differences between groups for 10 m and 20 m sprint performance failed to reach statistical significance, and no significant differences were observed within or between groups for 505 time. These findings highlight the difficulty in substantially enhancing speed and COD ability in highly trained athletic populations through the addition of a low volume, short duration plyometric training protocol.

scholarly journals Dental arch effects after early and later timed cervical headgear treatment—a randomized controlled trial

2019 ◽  
Vol 41 (6) ◽  
pp. 622-630
Author(s):  
Johanna Julku ◽  
Matti Hannula ◽  
Kirsi Pirilä-Parkkinen ◽  
Mimmi Tolvanen ◽  
Pertti Pirttiniemi
Keyword(s):  
Repeated Measures ◽  
Controlled Trial ◽  
Class Ii ◽  
Dental Arch ◽  
Maxillary Molars ◽  
Parallel Group ◽  
Repeated Measures Analysis ◽  
Size Groups ◽  
T1 And T2

Summary Background Cervical headgear (CH) is a commonly used orthodontic appliance and its dentoalveolar changes are known. However, the effects related to gender and timing have gained less attention. Objectives To examine dimensions of dental arches among children with Class II occlusion without posterior mandibular rotation according to timing of Kloehn-type CH treatment. Trial design Prospective, randomized, parallel-group controlled trial. Methods Sixty-seven seven-year-old children with a Class II occlusion were included in the study. The children were randomized into two equal-size groups in 1:1 ratio by sealed-envelope randomization. The early group (EG, n = 33) was treated between T0 and T1 (26 months), right after eruption of the first maxillary molars. The late group (LG, n = 34) was treated between T1 and T2 (24 months). The children were treated with CH until normal Class I occlusion on first molars was achieved. Impressions for dental casts were taken from all participants at T0, T1, and T2. Blinding was applicable for outcome assessors. Changes in dental cast measurements were compared between the groups and genders using t-test, Mann-Whitney U-test, and repeated measures analysis of variance. Results Of the children, 56 completed the study. The maxillary arch length and the transversal changes between the upper canines and upper first molars were significantly increased in EG at T0−T1 (P < 0.001). At T2, the transversal dimension between the upper first molars was larger (P < 0.05), and in the lower arch the mandibular arch length (P < 0.05) and the transversal dimension between the lower first molars (P < 0.01) were increased in EG males compared to LG males. No harms were encountered. Conclusions The male gender benefits most from early timing of the CH treatment, showing larger dimensions at the end of the follow-up. The results clearly indicated a wider and longer upper dental arch and spontaneous expansion of the lower dental arch after treatment. Clinical Registration NCT02010346.

scholarly journals Tinospora cordifolia Enhances Vyadhikshamatwa (immunity) in Children

2015 ◽  
Vol 4 (4) ◽  
pp. 227-230
Author(s):  
Devasya Narayana Sharma ◽  
◽  
Ajitha Sharma ◽  
◽  
Keyword(s):  
Repeated Measures ◽  
Controlled Trial ◽  
Study Drug ◽  
Absolute Lymphocyte Count ◽  
Tinospora Cordifolia ◽  
Total Leucocyte Count ◽  
Traditional Medicines ◽  
Repeated Measures Analysis ◽  
Increased Risk

Background: The immune system in children is constantly developing and they are at an increased risk of infections. It is vital to help enhance immunity by vaccination but more people are turning towards traditional medicines today. The vast flora of the world offers newer options to this effect and is worth exploring. Tinospora cordifolia (Guduchi) is one such plant which has been traditionally used for various health conditions and is also proven to be an immunomodulator. Objective: To evaluate the role of Tinospora cordifolia in status of Vyadhikshamatwa (immunity) in children. Materials and Methods: An open-labelled, placebo-controlled, randomized controlled trial was conducted in 400 children aged 1-15 years, with 200 each in control and test groups. Study drug and placebo were administered orally at a dose of 100 mg/kg body weight twice daily with honey for 2 months. Response was assessed by total leucocyte count (TLC), lymphocyte percentage and absolute lymphocyte count (ALC). Results were analysed statistically using repeated measures Analysis of Variance (ANOVA) for intra-group comparisons and unpaired t-test for intergroup comparisons using Statistical Packages for Social Sciences (SPSS) software version 20.0. Results: The test drug showed statistically significant increase in TLC (P<0.001), ALC (P<0.001) and lymphocyte percentage (P<0.001) as compared to placebo. Also the rate of infections in the trial group were significantly lesser during the study period (P<0.001). Conclusion: Tinospora cordifolia significantly improves immunity in children and can be used as an adjuvant to vaccination.

Progress of negative symptoms over the initial 5 years of a first episode of psychosis

2018 ◽  
Vol 49 (1) ◽  
pp. 66-74 ◽  
Author(s):  
Danyael Lutgens ◽  
Ridha Joober ◽  
Srividya Iyer ◽  
Martin Lepage ◽  
Ross Norman ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Negative Symptoms ◽  
Controlled Trial ◽  
Additional Benefit ◽  
First Episode ◽  
Systematic Assessment ◽  
Randomized Controlled ◽  
Regular Care ◽  
Repeated Measures Analysis ◽  
Extension Period

AbstractBackgroundSpecialized early intervention (EI) following a first episode of psychosis (FEP) are effective at reducing negative symptoms, although its trajectory warrants systematic assessment. However, findings are equivocal as to whether extended gains are made post 2 years of EI and whether there is additional benefit of extending EI for an additional 3 years.MethodsData on 178 FEP patients, from a randomized controlled trial of a 3-year extension of EI service v. transfer to regular care following 2 years of EI service, were used for this report. Repeated measures analysis of variance were conducted separately for the initial 2 years of treatment in an EI service, and for the 3-year post-randomization to examine trajectories of negative symptoms over the two periods in the two arms of the study.ResultsThere were significant improvements in total negative symptoms over the first 2 years of EI F(4.612, 797.905) = 25.263, p < 0.001 and in domains of ‘expressivity’ and ‘motivation’. In the following 3 years, there were further significant improvements in negative symptoms F(4.318, 759.908) = 4.182, p = 0.002 with no difference between groups F(4.318, 759.908) = 1.073, p = 0.371. Changes in negative symptoms over the extension period were driven by expressivity F(4.01, 674.73) = 7.19, p < 0.01, but not motivation F(6.58, 1112.18) = 0.95, p = 0.46.ConclusionNegative symptoms improve significantly over the first 2 years of EI. Subsequent amelioration was largely the result of expressivity. Motivation deficits remained stable. Extended EI offered no advantage over regular care post-randomization.

scholarly journals Pain control in orthodontics using a micropulse vibration device: A randomized clinical trial

2015 ◽  
Vol 86 (4) ◽  
pp. 625-630 ◽  
Author(s):  
Wendy D. Lobre ◽  
Brent J. Callegari ◽  
Gary Gardner ◽  
Curtis M. Marsh ◽  
Anneke C. Bush ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Repeated Measures ◽  
Pain Perception ◽  
Control Group ◽  
Eligibility Criteria ◽  
Pain Scores ◽  
Parallel Group ◽  
Repeated Measures Analysis ◽  
The Relationship

ABSTRACT Objective:  To investigate the relationship between a micropulse vibration device and pain perception during orthodontic treatment. Materials and Methods:  This study was a parallel group, randomized clinical trial. A total of 58 patients meeting eligibility criteria were assigned using block allocation to one of two groups: an experimental group using the vibration device or a control group (n  =  29 for each group). Patients used the device for 20 minutes daily. Patients rated pain intensity on a visual analog scale at appropriate intervals during the weeks after the separator or archwire appointment. Data were analyzed using repeated measures analysis of variance at α  =  .05. Results:  During the 4-month test period, significant differences between the micropulse vibration device group and the control group for overall pain (P  =  .002) and biting pain (P  =  .003) were identified. The authors observed that perceived pain was highest at the beginning of the month, following archwire adjustment. Conclusion:  The micropulse vibration device significantly lowered the pain scores for overall pain and biting pain during the 4-month study period.

scholarly journals The Effects of Frontal- and Sagittal-Plane Plyometrics on Change-of-Direction Speed and Power in Adolescent Female Basketball Players

2016 ◽  
Vol 11 (1) ◽  
pp. 102-107 ◽  
Author(s):  
Brian T. McCormick ◽  
James C. Hannon ◽  
Maria Newton ◽  
Barry Shultz ◽  
Nicole Detling ◽  
...  
Keyword(s):  
Training Program ◽  
Interaction Effect ◽  
Repeated Measures ◽  
Sagittal Plane ◽  
Plyometric Training ◽  
Basketball Players ◽  
Significant Interaction Effect ◽  
Significant Group ◽  
Change Of Direction ◽  
Improved Performance

Plyometrics is a popular training modality for basketball players to improve power and change-of-direction speed. Most plyometric training has used sagittal-plane exercises, but improvements in change-of-direction speed have been greater in multidirection programs.Purpose:To determine the benefits of a 6-wk frontal-plane plyometric (FPP) training program compared with a 6-wk sagittal-plane plyometric (SPP) training program with regard to power and change-of-direction speed.Methods:Fourteen female varsity high school basketball players participated in the study. Multiple 2 × 2 repeated-measures ANOVAs were used to determine differences for the FPP and SPP groups from preintervention to postintervention on 4 tests of power and 2 tests of change-of-direction speed.Results:There was a group main effect for time in all 6 tests. There was a significant group × time interaction effect in 3 of the 6 tests. The SPP improved performance of the countermovement vertical jump more than the FPP, whereas the FPP improved performance of the lateral hop (left) and lateral-shuffle test (left) more than the SPP. The standing long jump, lateral hop (right), and lateral-shuffle test (right) did not show a significant interaction effect.Conclusions:These results suggest that basketball players should incorporate plyometric training in all planes to improve power and change-of-direction speed.

scholarly journals Probiotics and the Microbiome in Celiac Disease: A Randomised Controlled Trial

2016 ◽  
Vol 2016 ◽  
pp. 1-16 ◽  
Author(s):  
Joanna Harnett ◽  
Stephen P. Myers ◽  
Margaret Rolfe
Keyword(s):  
Celiac Disease ◽  
Repeated Measures ◽  
Controlled Trial ◽  
Symptom Improvement ◽  
Gluten Free ◽  
Faecal Microbiota ◽  
Gastrointestinal Microbiota ◽  
Safety Measures ◽  
Repeated Measures Analysis ◽  
Randomised Controlled

Background. There is limited research investigating the composition of the gastrointestinal microbiota in individuals with celiac disease (CoeD) reporting only partial symptom improvement despite adherence to a strict gluten-free diet (GFD). The aim of this research was to determine if the gastrointestinal microbiota could be altered by probiotic bacteria and provide a potential new therapy for this subgroup.Methods. A multicentre RCT was conducted between January and August 2011 in Australia. Participants included 45 people with CoeD reporting only partial symptom improvement despite adherence to a strict GFD for a minimum of 12 months. Participants took 5 g of VSL#™probiotic formulation (n=23) or 5 g placebo (n=22) orally twice daily for 12 weeks. The main outcome measured was the efficacy of the probiotic formula in altering faecal microbiota counts between baseline and week 12. Safety was determined by safety blood and monitoring adverse events.Results. SPSS™multivariate repeated measures analysis (95th confidence level) revealed no statistically significant changes between the groups in the faecal microbiota counts or blood safety measures over the course of the study.Conclusion. The probiotic formula when taken orally over the 12-week period did not significantly alter the microbiota measured in this population. The trial was registered with Australian and New Zealand Clinical Trials RegisterACTRN12610000630011.

Effects of gastrocnemius stretching with talus-stabilizing taping on ankle dorsiflexion and balance in individuals with limited ankle dorsiflexion: A randomized controlled trial

2021 ◽  
pp. 1-9
Author(s):  
Jong-Chul Jung ◽  
Yong-Il Shin ◽  
Da-In An ◽  
Won-Young Park ◽  
Soo-Yong Kim
Keyword(s):  
Repeated Measures ◽  
Controlled Trial ◽  
Ankle Dorsiflexion ◽  
Long Term Effects ◽  
Post Intervention ◽  
Balance Test ◽  
Randomized Controlled ◽  
Repeated Measures Analysis ◽  
Significant Difference

BACKGROUND: Various interventions have been recommended to increase ankle dorsiflexion range of motion (DFROM); however, few studies have investigated the long-term effects of applying gastrocnemius stretching with talus-stabilizing taping (GSTST). OBJECTIVE: To compare the effects of gastrocnemius stretching (GS) and GSTST on DFROM and balance in subjects with limited DFROM. METHODS: Twenty-six subjects with limited DFROM were randomly allocated to either the GS group (n= 13) or GSTST group (n= 13) for 6 weeks. Maximum DFROM before heel-off during gait, passive DFROM, posterior talar glide, flexibility of the gastrocnemius, and the lower-quarter Y-balance test (YBT-LQ) were assessed pre-intervention and post-intervention. Two-way repeated-measures analysis of variance was used to compare the changes in variables. RESULTS: The GSTST group had greater maximum DFROM before heel-off, passive DFROM, and posterior talar glide than the GS group. Gastrocnemius flexibility and YBT-LQ scores increased significantly post-intervention in both groups; however, there was no significant difference between the groups. CONCLUSIONS: GSTST is recommend for improving ankle DFROM and balance in subjects with limited DFROM.

scholarly journals Effects of Plyometric Training and Beta-Alanine Supplementation on Maximal-Intensity Exercise and Endurance in Female Soccer Players

2017 ◽  
Vol 58 (1) ◽  
pp. 99-109 ◽  
Author(s):  
Fabián Rosas ◽  
Rodrigo Ramírez-Campillo ◽  
Cristian Martínez ◽  
Alexis Caniuqueo ◽  
Rodrigo Cañas-Jamet ◽  
...  
Keyword(s):  
Training Program ◽  
Controlled Trial ◽  
Training Group ◽  
Soccer Players ◽  
Control Group ◽  
Plyometric Training ◽  
Change Of Direction ◽  
Maximal Intensity ◽  
Beta Alanine ◽  
Speed Performance

AbstractPlyometric training and beta-alanine supplementation are common among soccer players, although its combined use had never been tested. Therefore, a randomized, double-blind, placebo-controlled trial was conducted to compare the effects of a plyometric training program, with or without beta-alanine supplementation, on maximal-intensity and endurance performance in female soccer players during an in-season training period. Athletes (23.7 ± 2.4 years) were assigned to either a plyometric training group receiving a placebo (PLACEBO, n = 8), a plyometric training group receiving beta-alanine supplementation (BA, n = 8), or a control group receiving placebo without following a plyometric training program (CONTROL, n = 9). Athletes were evaluated for single and repeated jumps and sprints, endurance, and change-of-direction speed performance before and after the intervention. Both plyometric training groups improved in explosive jumping (ES = 0.27 to 1.0), sprinting (ES = 0.31 to 0.78), repeated sprinting (ES = 0.39 to 0.91), 60 s repeated jumping (ES = 0.32 to 0.45), endurance (ES = 0.35 to 0.37), and change-of-direction speed performance (ES = 0.36 to 0.58), whereas no significant changes were observed for the CONTROL group. Nevertheless, compared to the CONTROL group, only the BA group showed greater improvements in endurance, repeated sprinting and repeated jumping performances. It was concluded that beta-alanine supplementation during plyometric training may add further adaptive changes related to endurance, repeated sprinting and jumping ability.

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