scholarly journals The Effects of Lateral Bounds on Post-Activation Potentiation of Change-of-Direction Speed Measured by the 505 Test in College-Aged Men and Women

Sports ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 71 ◽  
Author(s):  
Ashley J. Orjalo ◽  
Robert G. Lockie ◽  
Katherine Balfany ◽  
Samuel J. Callaghan
Keyword(s):  
Test Performance ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Test Session ◽  
Repeated Measures Anova ◽  
Change Of Direction ◽  
Speed Test ◽  
Repeated Measures Analysis ◽  
Partial Correlations ◽  
Weighted Vest

Forty recreationally-trained individuals completed four testing sessions to determine whether lateral bounds (LB) or weighted lateral bounds enhanced change-of-direction (COD) speed measured by the 505 COD speed test. Session 1 included vertical jump and lateral bound (LB) testing to measure power. Sessions 2–4 involved three randomized conditioning activities (CA): 3 × 5 LB; 3 × 5 weighted LB (10% body mass provided by a weighted vest); and a control condition (4-min rest). The 505 COD speed test was performed 5- and 2.5-min pre-CA, and ~15 s, 4, 8, 12, and 16 min post-CA. A 3 × 6 repeated measures analysis of variance (ANOVA) calculated performance changes across time points post-CA. A 3 × 2 repeated measures ANOVA analyzed best potentiated performance. Smallest worthwhile change (SWC) measured within-subject 505 COD speed test performance. Partial correlations controlling for sex calculated relationships between the vertical jump, LB, and percent potentiation. There were no differences (p = 0.919) in 505 time relative to baseline for any CA, nor was the SWC exceeded. The best potentiated 505 time was faster (p < 0.001) than baseline for all CA, with no between-CA differences. There were no significant (p = 0.056–0.993) correlations between power and potentiation. LB and weighted LB did not potentiate the 505 COD speed test, although performance was not hindered.

scholarly journals The Effects of the Barbell Hip Thrust on Post-Activation Performance Enhancement of Change of Direction Speed in College-Aged Men and Women

Sports ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 151
Author(s):  
Ashley J. Orjalo ◽  
Samuel J. Callaghan ◽  
Robert G. Lockie
Keyword(s):  
Repeated Measures ◽  
Performance Enhancement ◽  
Relative Strength ◽  
Men And Women ◽  
Repeated Measures Anova ◽  
Change Of Direction ◽  
Speed Test ◽  
Main Effect ◽  
Partial Correlations ◽  
And Performance

This study investigated whether the barbell hip thrust (BHT) enhanced change-of-direction (COD) speed measured by the 505 COD speed test. Forty recreationally trained individuals completed three sessions. Session 1 included one-repetition maximum (1RM) BHT testing to measure absolute and relative strength. Sessions 2 and 3 involved two counter-balanced conditioning activities (CAs): 3 sets × 5 repetitions of the BHT at 85% 1RM and a control condition (CC; 6 min rest). The 505 COD speed test was performed 5 and 2.5 min pre-CA, and 4, 8, 12, and 16 min post-CA in each session. A 2 × 5 repeated-measures ANOVA (p < 0.05) calculated performance changes across time post-CA. A 2 × 2 repeated-measures ANOVA analyzed best potentiated performance. Partial correlations controlling for sex calculated relationships between the 1RM BHT and 505 COD speed test percent potentiation. There was a significant main effect for time (p < 0.001), but not for condition (p = 0.271) or condition × time (p = 0.295). There were no significant correlations between 1RM BHT and potentiation. The 85% 1RM BHT did potentiate the 505 4–16 min post-CA but no more than the CC. Nonetheless, a heavy BHT could be programmed prior to COD drills as COD speed could be potentiated and performance improved in men and women.

scholarly journals Computerized Symbol Digit Modalities Test in a Swiss Pediatric Cohort – Part 2: Clinical Implementation

2021 ◽  
Vol 12 ◽  
Author(s):  
Marie-Noëlle Klein ◽  
Ursina Jufer-Riedi ◽  
Sarah Rieder ◽  
Céline Hochstrasser ◽  
Michelle Steiner ◽  
...  
Keyword(s):  
Test Performance ◽  
Repeated Measures ◽  
Analysis Of Covariance ◽  
Fine Motor ◽  
Clinical Implementation ◽  
Information Processing Speed ◽  
Repeated Measures Anova ◽  
Repeated Measures Analysis ◽  
Significant Difference ◽  
Motor Dexterity

BackgroundInformation processing speed (IPS) is a marker for cognitive function. It is associated with neural maturation and increases during development. Traditionally, IPS is measured using paper and pencil tasks requiring fine motor skills. Such skills are often impaired in patients with neurological conditions. Therefore, an alternative that does not need motor dexterity is desirable. One option is the computerized symbol digit modalities test (c-SDMT), which requires the patient to verbally associate numbers with symbols.MethodsEighty-six participants (8–16 years old; 45 male; 48 inpatients) were examined, 38 healthy and 48 hospitalized for a non-neurological disease. All participants performed the written SDMT, c-SDMT, and the Test of Non-verbal Intelligence Fourth Edition (TONI-4). Statistical analyses included a multivariate analysis of covariance (MANCOVA) for the effects of intelligence (IQ) and hospitalization on the performance of the SDMT and c-SDMT. A repeated measures analysis of variance (repeated measures ANOVA) was used to compare performance across c-SDMT trials between inpatients and outpatients.ResultsThe MANCOVA showed that hospitalization had a significant effect on IPS when measured with the SDMT (p = 0.04) but not with the c-SDMT (p = 0.68), while IQ (p = 0.92) had no effect on IPS. Age (p &lt; 0.001) was the best predictor of performance of both tests. The repeated measures ANOVA revealed no significant difference in within-test performance (p = 0.06) between outpatient and inpatient participants in the c-SDMT.ConclusionPerformance of the c-SDMT is not confounded by hospitalization and gives within-test information. As a valid and reliable measure of IPS for children and adolescents, it is suitable for use in both inpatient and outpatient populations.

scholarly journals Effects of Different Intensities of Weighted Vest Warming up Session on Physical Performances of Power Sports Athletes

2018 ◽  
Vol 7 (2.15) ◽  
pp. 161
Author(s):  
Zulezwan Ab Malik ◽  
Asmadi Ishak ◽  
Noor Aiwa Rosman ◽  
Noorzaliza Osman ◽  
Abdul Kadir Mahmod ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Mass ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Additional Weight ◽  
Jump Test ◽  
Repeated Measures Analysis ◽  
Vital Component ◽  
Physical Performances ◽  
Weighted Vest

Optimum physical performance is vital component for athletes to excellent in their sports. Weighted vest warming up is one of the ways to manipulate intensities of warming. The purpose of this was to investigate the effect of different intensities weighted vest warming up session on physical performances. Twenty participants from power sports athletes was did all weighted vest warming up protocol (a) wore weighted vest 6% of body mass,(W6),(b) wore weighted vest 12% of body mass (W12)  (c) with body weight only or 0% of additional weight in intensities of warming up session (W0). All participants undergo cross over design and evaluated using vertical jump test, standing broad jump test, seated medicine ball toss test and 20m sprint test after finish each warming up sessions. 1-way, repeated-measures analysis of variance on the test result showed significant different of the effect different intensities of weighted vest warming up session on all physical performances test. In conclusion, usage of 6% and 12 % from body weight of additional weight on weighted vest warming up session can promote to improving physical performances.  

scholarly journals Physical Qualities Pertaining to Shorter and Longer Change-of-Direction Speed Test Performance in Men and Women

Sports ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 45 ◽  
Author(s):  
Robert Lockie ◽  
Brett Post ◽  
J. Dawes
Keyword(s):  
Test Performance ◽  
Vertical Jump ◽  
Anaerobic Power ◽  
Regression Equations ◽  
Lower Body ◽  
Training Time ◽  
Linear Speed ◽  
Change Of Direction ◽  
Explained Variance ◽  
Lower Body Power

This study investigated relationships between shorter (505, change-of-direction (COD) deficit as a derived physical quality) and longer (Illinois agility test; IAT) COD tests with linear speed, lower-body power (multidirectional jumping), and strength in recreationally-trained individuals. Twenty-one males and 22 females (similar to collegiate club-sport and tactical athletes) were assessed in: 505 and COD deficit from each leg; IAT; 20 m sprint; vertical jump (VJ height, peak anaerobic power measured in watts (PAPw), power-to-body mass ratio); standing broad jump; lateral jump (LJ) from each leg; and absolute and relative isometric midthigh pull (IMTP) strength. Partial correlations calculated sex-determined relationships between the COD and performance tests, with regression equations calculated (p < 0.05). The 505 and IAT correlated with all tests except PAPw and absolute IMTP (r = ±0.43–0.71). COD deficit correlated with the LJ (r = −0.34–0.60). Left- and right-leg 505 was predicted by sex, 20 m sprint, and left-leg LJ (70–77% explained variance). Right-leg COD deficit was predicted by sex and left-leg LJ (27% explained variance). IAT was predicted by sex, 20 m sprint, right-leg LJ, and relative IMTP (84% explained variance). For individuals with limited training time, improving linear speed, and relative lower-body power and strength, could enhance shorter and longer COD performance.

scholarly journals A 1-Year Study of Endurance Runners: Training, Laboratory Tests, and Field Tests

2014 ◽  
Vol 9 (6) ◽  
pp. 1019-1025 ◽  
Author(s):  
Andy Galbraith ◽  
James Hopker ◽  
Marco Cardinale ◽  
Brian Cunniffe ◽  
Louis Passfield
Keyword(s):  
Field Test ◽  
Test Performance ◽  
Repeated Measures ◽  
Lactate Threshold ◽  
Laboratory Tests ◽  
Field Tests ◽  
Running Economy ◽  
Training Time ◽  
Repeated Measures Anova ◽  
Endurance Runners

Purpose:To examine the training and concomitant changes in laboratory- and field-test performance of highly trained endurance runners.Methods:Fourteen highly trained male endurance runners (mean ± SD maximal oxygen uptake [VO2max] 69.8 ± 6.3 mL · kg−1 · min−1) completed this 1-y training study commencing in April. During the study the runners undertook 5 laboratory tests of VO2max, lactate threshold (LT), and running economy and 9 field tests to determine critical speed (CS) and the modeled maximum distance performed above CS (D′). The data for different periods of the year were compared using repeated-measures ANOVA. The influence of training on laboratory- and field-test changes was analyzed by multiple regression.Results:Total training distance varied during the year and was lower in May–July (333 ± 206 km, P = .01) and July–August (339 ± 206 km, P = .02) than in the subsequent January–February period (474 ± 188 km). VO2max increased from the April baseline (4.7 ± 0.4 L/min) in October and January periods (5.0 ± 0.4 L/min, P ≤ .01). Other laboratory measures did not change. Runners’ CS was lowest in August (4.90 ± 0.32 m/s) and highest in February (4.99 ± 0.30 m/s, P = .02). Total training distance and the percentage of training time spent above LT velocity explained 33% of the variation in CS.Conclusion:Highly trained endurance runners achieve small but significant changes in VO2max and CS in a year. Increases in training distance and time above LT velocity were related to increases in CS.

scholarly journals An introductory analysis as to the influence of lower-body power on multidirectional speed in collegiate female rugby players

2016 ◽  
Vol 25 (1-2) ◽  
pp. 113-134 ◽  
Author(s):  
Robert G. Lockie ◽  
Ashley J. Orjalo ◽  
Victoria L. Amran ◽  
Deshaun L. Davis ◽  
Fabrice G. Risso ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Team Sport ◽  
Rugby Player ◽  
Lower Body ◽  
Change Of Direction ◽  
Speed Test ◽  
Speed Performance ◽  
Left And Right ◽  
Rugby Players ◽  
Lower Body Power

AbstractThis study investigated relationships between lower-body power, measured by a vertical jump (VJ) and standing broad jump (SBJ), with multidirectional speed in collegiate female rugby players. The rugby player data was compared to that of general team sport athletes to ascertain whether there were characteristics specific to collegiate rugby players. Multi-directional speed was measured by a 20-meter (m) sprint (0-5, 0-10, 0-20 m intervals) and 505 change-of-direction speed test. Eight rugby players and eight team sport athletes completed all tests. Spearman’s correlations calculated relationships between the VJ and SBJ with the speed tests, and stepwise multiple regressions determined whether the jump tests predicted speed performance (p≤ 0.05). For the rugby players, the VJ correlated with the 0-20 m interval (r = −0.73). The SBJ correlated with the 0-5 and 0-10 m intervals, and the left-leg 505 (r = −0.71 to −0.88), and predicted 0-5 m and left-leg 505 time (r2= 0.50-0.58). For the team sport athletes, only the VJ correlated with left-leg 505 (r = −0.80), and predicted left- and right-leg 505 times (r2= 0.61-0.69). The results suggest that horizontal power measured by a SBJ has a greater contribution to multidirectional speed in collegiate female rugby players.

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&rsquo;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 &plusmn; 0.08 s pre vs 1.851 &plusmn; 0.06 s post) (ES = &minus;0.44) (P = &lt;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.

Acute Effects of a Loaded Warm-Up Protocol on Change of Direction Speed in Professional Badminton Players

2014 ◽  
Vol 30 (5) ◽  
pp. 637-642 ◽  
Author(s):  
Sean J. Maloney ◽  
Anthony N. Turner ◽  
Stuart Miller
Keyword(s):  
Body Mass ◽  
Recovery Time ◽  
Vertical Jump ◽  
Acute Effects ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Warm Up ◽  
Change Of Direction ◽  
Before And After ◽  
Weighted Vest

It has previously been shown that a loaded warm-up may improve power performances. We examined the acute effects of loaded dynamic warm-up on change of direction speed (CODS), which had not been previously investigated. Eight elite badminton players participated in three sessions during which they performed vertical countermovement jump and CODS tests before and after undertaking the dynamic warm-up. The three warm-up conditions involved wearing a weighted vest (a) equivalent to 5% body mass, (b) equivalent to 10% body mass, and (c) a control where a weighted vest was not worn. Vertical jump and CODS performances were then tested at 15 seconds and 2, 4, and 6 minutes post warm-up. Vertical jump and CODS significantly improved following all warm-up conditions (P< .05). Post warm-up vertical jump performance was not different between conditions (P= .430). Post warm-up CODS was significantly faster following the 5% (P= .02) and 10% (P< .001) loaded conditions compared with the control condition. In addition, peak CODS test performances, independent of recovery time, were faster than the control condition following the 10% loaded condition (P= .012). In conclusion, the current study demonstrates that a loaded warm-up augmented CODS, but not vertical jump performance, in elite badminton players.

scholarly journals Reliability of the 505 Change-of-Direction Test in Netball Players

2016 ◽  
Vol 11 (3) ◽  
pp. 377-380 ◽  
Author(s):  
Olivia R. Barber ◽  
Christopher Thomas ◽  
Paul A. Jones ◽  
John J. McMahon ◽  
Paul Comfort
Keyword(s):  
Body Mass ◽  
Analysis Of Variance ◽  
Repeated Measures ◽  
Measurement Errors ◽  
High Reliability ◽  
Learning Effects ◽  
Reliable Test ◽  
Change Of Direction ◽  
Repeated Measures Analysis

Purpose:To determine the reliability of the 505 change-of-direction (COD) test performed with both a stationary and a flying start.Methods:Fifty-two female netball players (age 23.9 ± 5.4 y, height 169.9 ± 3.3 cm, body mass 65.2 ± 4.6 kg) performed 6 trials of the 505 COD test, 3 with a flying start and 3 with a stationary start, once per week over a 4-wk period to determine within- and between-sessions reliability.Results:Testing revealed high within-session reliability for the stationary start (ICC = .96–.97) and for the flying start (ICC = .90–.97). Similarly, both the stationary start (ICC = .965) and the flying start (ICC = .951) demonstrated high reliability between sessions, although repeated-measures analysis of variance (P < .001) revealed learning effects between sessions for both tests. Performances stabilized on day 2 for the static start and on day 3 for the flying start.Conclusions:The 505 COD test is a reliable test in female netball players, with either a stationary or flying start. Smallest detectable differences of 3.91% and 3.97% for the stationary start and the flying start, respectively, allow practitioners to interpret whether changes in time taken to complete the 505 COD test reflect genuine improvements in performance or are measurement errors. It is suggested that 1 d of familiarization testing be performed for the stationary start and 2 d of familiarization for the flying start, to minimize learning effects.

Subjective Judging and the Home Advantage in Female Collegiate Division I Gymnastics

2008 ◽  
Vol 17 (2) ◽  
pp. 3-7 ◽  
Author(s):  
Timothy Baghurst ◽  
Inza Fort
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Division I ◽  
Performance Effect ◽  
Repeated Measures Anova ◽  
Repeated Measures Analysis ◽  
Home Advantage ◽  
At Home

The purpose of this study was to investigate the home advantage in female collegiate Division I gymnastics by apparatus and determine the performance effect of the Judges’ Assignor System (JAS) introduced in 2005 on each apparatus. Participant teams (N = 15) were selected based on their ranking in the top 25 nationally at the end of each regular season from 2003 to 2007. A repeated measures analysis of variance (ANOVA) revealed home scores for each apparatus were significantly higher than their respective away scores, with the largest differences occurring in the uneven bars and floor exercise. Additionally, a repeated measures ANOVA to assess the JAS impact on scores revealed that home performances yielded higher scores than away for all apparatus, and scores for all apparatus were lower both at home and away since the introduction of JAS. Results are assessed based on current research, and application for judges and coaches is discussed.

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