scholarly journals A PILOT ANALYSIS: CAN THE BULGARIAN SPLIT-SQUAT POTENTIATE SPRINT ACCELERATION IN STRENGTH-TRAINED MEN?

2018 ◽  
Vol 15 (3) ◽  
pp. 453 ◽  
Author(s):  
Robert George Lockie ◽  
Ashley Orjalo ◽  
Matthew Moreno
Keyword(s):  
Individual Variation ◽  
Repeated Measures ◽  
Peak Power ◽  
Relative Strength ◽  
Sprint Performance ◽  
The Other ◽  
Repeated Measures Anova ◽  
Repetition Maximum ◽  
Position Transducer

This study determined whether a five repetition-maximum Bulgarian split-squat (5RM BSS) could potentiate a 0-5, 0-10, and 0-20 m (meter) sprint performance. Seven men were assessed in the 5RM BSS (a linear position transducer measured peak power [PP] and force [PF] for each leg), and completed two post activation potentiation (PAP) sessions. One session involved a control condition (CC) of 4 minutes (min) rest; the other the 5RM BSS. Participants were assessed in baseline sprints, and sprints of 15 seconds, 2, 4, 8, 12, and 16 min post-PAP intervention. A repeated measures ANOVA (p < 0.05) calculated significant changes in sprint times. The best potentiated time for each interval was also compared to the baseline. Spearman’s correlations (r; p < 0.05) calculated relationships between absolute and relative strength, PP and PF, with percent potentiation in sprint times. The BSS did not potentiate speed at any time, although there was great individual variation. The best 0-5 m time was significantly different from the baseline (p = 0.022), with no differences between PAP conditions. Significant correlations were found between strength and sprint potentiation at 16 min for the 0-5 m interval, and at 8 min and the best times for the 0-20 m interval (r = -0.786 to -0.893). There were correlations between PP and PF for each leg with sprint potentiation from 2-12 min across all intervals (r = -0.786 to -0.964). Stronger individuals who generate greater PP and PF in a 5RM BSS will be more likely to potentiate 20-m sprint performance.

Sight-Singing Scores of High School Choristers with Extensive Training in Movable Solfège Syllables and Curwen Hand Signs

2008 ◽  
Vol 56 (3) ◽  
pp. 255-266 ◽  
Author(s):  
Alan C. McClung
Keyword(s):  
High School ◽  
Knowledge Base ◽  
Repeated Measures ◽  
The Other ◽  
Sight Singing ◽  
Repeated Measures Anova ◽  
Pedagogical Strategy ◽  
Extensive Training ◽  
Significant Difference ◽  
The Mean

Randomly chosen high school choristers with extensive training in solfège syllables and Curwen hand signs ( N = 38) are asked to sight-sing two melodies, one while using Curwen hand signs and the other without. Out of a perfect score of 16, the mean score with hand signs was 10.37 ( SD = 4.23), and without hand signs, 10.84 ( SD = 3.96). A repeated-measures ANOVA revealed no statistically significant difference, F(1, 37) = .573, p = .454. These findings support the results of five earlier studies; however, because earlier studies were limited to students who were minimally trained in movable solfège syllables and Curwen hand signs, this study expands the knowledge base. Relationships between performance scores and instrumental experience, class grade, sight-singing experience, and hand sign experience were also examined. A pedagogical strategy for linking Curwen hand signs with students' preferred modes of learning (especially the kinesthetic mode) is recommended.

scholarly journals A Preliminary Analysis of Relationships between a 1RM Hexagonal Bar Load and Peak Power with the Tactical Task of a Body Drag

2019 ◽  
Vol 68 (1) ◽  
pp. 157-166 ◽  
Author(s):  
Robert G. Lockie ◽  
Katherine Balfany ◽  
Jenna K. Denamur ◽  
Matthew R. Moreno
Keyword(s):  
Law Enforcement ◽  
Linear Regression ◽  
Preliminary Analysis ◽  
Peak Power ◽  
Law Enforcement Officers ◽  
Relative Strength ◽  
The Body ◽  
Repetition Maximum ◽  
Body Drag ◽  
Partial Correlations

AbstractA critical job task for law enforcement officers that should be influenced by strength is the body drag. This study analyzed relationships between absolute and relative strength measured by a one-repetition maximum hexagonal bar deadlift (1RM HBD), with body drags completed with 74.84 kg and 90.72 kg dummies. Twenty recreationally-trained individuals completed the 1RM HBD in one session, with peak power measured via a linear position transducer. Over two subsequent sessions, participants dragged the 74.84 kg and 90.72 kg dummies with two techniques. The first technique followed Californian standards, where participants wrapped their arms around the dummy and lifted it to standing before timing commenced. In the adapted technique, timing included the initial manipulation of the dummy. Participants dragged the dummy as quickly as possible over a 9.75 m distance. Partial correlations and linear regression (controlling for sex; p < 0.05) analyzed relationships between the HBD and body drags. The standard 74.84 kg body drag correlated with every HBD variable (r = -0.477 to -0.666), and was predicted by the absolute 1RM HBD (r2 = 0.467). The adapted 74.84 kg drag correlated with all HBD variables (r = -0.535 to - 0.754), and was predicted by peak power and the 1RM HBD (r2 = 0.758). Both 90.72 kg drags correlated with absolute and relative 1RM HBD (r = -0.517 to -0.670). Strength related to all body drags; peak power may be more important for drags with lighter loads. Strength training should be a focus in law enforcement to enhance drag performance.

The effect of serrating abutment-implant mating surface on torque stability of implant-abutment connection, before and after cyclic loading.

2020 ◽  
Author(s):  
Vida Rezayani ◽  
Marzieh Alikhasi ◽  
Abbas Monzavi
Keyword(s):  
Cyclic Loading ◽  
Repeated Measures ◽  
Peak Load ◽  
T Test ◽  
The Other ◽  
Repeated Measures Anova ◽  
Implant Abutment ◽  
Before And After ◽  
Torque Loss ◽  
Connection Design

This study evaluated the effect of adding serration to the abutment-implant connection on torque maintenance before and after loading. Two implant systems with the same dimensions and connection design (internal 8˚morse taper octagon) were selected: one with non-serrated abutments (Simple line II) and the other one with serrated abutments (F & B). The removal torque value (RTV) was measured in two groups for each system: one group with one-piece abutments and the other group with two-piece abutments, before and after cyclic loading (n=10 in each group). The initial RTV of the abutment screw was measured with a digital torque meter. Each abutment received a cement-retained metal crown with 30° occlusal surface. Cyclic axial peak load of 75±5 N was applied to the implants for 500,000 cycles at 1 Hz. The post-load RTV was then measured. Two-way and repeated measures ANOVA, and independent t-test were applied to assess the effects of cyclic loading, connection design, abutment type, and their interaction on the percentage of torque loss (α=.05). Two-way ANOVA showed that serration of mating surfaces had a significant effect on torque maintenance before (P&lt;0.001) and after (P=0.004) cyclic loading. Repeated measures ANOVA also showed that loading had a significant effect on the torque loss percentage (P&lt; 0.01). Comparison of the groups with t-test showed that the torque loss of the serrated groups was lower than that of non- serrated groups. Despite the limitations of this study, the stability of the implant-abutment connection in the serrated design was higher than that of non-serrated group.

scholarly journals Comparison of the Efficacy of Intravenous, Subcutaneous, and Suppository Morphine in Reducing Post Hysterectomy Pain

2020 ◽  
Vol 22 (4) ◽  
pp. 195-199
Author(s):  
Sheida Shabanian ◽  
Ali Ahmadi ◽  
Razieh Mohammadi ◽  
Gholamreza Shabanian
Keyword(s):  
Repeated Measures ◽  
Relative Frequency ◽  
The Other ◽  
Pain Severity ◽  
Morphine Group ◽  
Repeated Measures Anova ◽  
Significant Difference ◽  
Intravenous Morphine ◽  
Recorded Data ◽  
The Difference

Background and aims: Postoperative pain has always been considered by surgeons because of its various complications. The aim of this study was to compare the effect of intravenous, subcutaneous and suppository morphine in reducing post-hysterectomy pain. Materials and Methods: In this clinical trial, 90 patients undergoing hysterectomy were randomized into three groups of 30 each using simple randomization, namely, intravenous, subcutaneous, and suppository morphine (10 mg). Before intervention and 4, 8, 12, and 16 hours after intervention, pain intensity was measured using visual analogue scale (VAS). Relative frequency of nausea, vomiting, itching, bradypnea, and apnea in all groups was recorded. Data were analyzed by SPSS version16.0. Results: Mean pain severity at 0 hour postoperatively (P=0.004), 4 hours postoperatively (P=0.009), 8 hours postoperatively (P=0.009), and 12 hours postoperatively (P=0.001) was significantly higher in the suppository morphine group than in the other two groups. There was no significant difference in pain severity at 16 hours postoperatively among the three groups (P=0.446). According to the results of repeated measures ANOVA, changes in pain severity at the five intervals were statistically significant in all three groups (subcutaneous, intravenous, and suppository morphine groups) (P<0.001). There was also a statistically significant difference in pain severity at the studied intervals among the three groups (P<0.001). The frequency of nausea (P=0.05) and vomiting (P=0.84) was higher in the suppository group than in the other two groups, although the difference was not statistically significant (P=0.05). Conclusion: The results of this study indicated better efficacy of subcutaneous and intravenous morphine in reducing post-hysterectomy pain compared with suppository morphine.

scholarly journals analysis of the multivariate-repeated-measures-experiment evaluating the influence of gibberellic acid on cherry fruit quality

2004 ◽  
Vol 1 (1) ◽  
pp. 235-248
Author(s):  
Damijana Kastelec ◽  
Valentina Usenik
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Repeated Measures ◽  
Pure Water ◽  
The Other ◽  
Experimental Unit ◽  
Fruit Firmness ◽  
Repeated Measures Anova ◽  
Time Points ◽  
Unit Factor

A repeated-measures experiment design including two between-unit factors and one within-unit factor was performed in order to examine the influence of gibberellic acid on cherry fruit quality. One of the two between-unit factors had two levels represented by two cherry cultivars ('Van', 'Sunburst') and the other consisted of two treatments: spraying with gibberellic acid and spraying with pure water as a control. An experimental unit was a cherry branch on which 20 cherries were sampled randomly and marked. The three variables which describe ripeness of cherries were measured over 6 time points at three or four day intervals during maturation. After picking the cherries, measurements of fruit firmness were made on 3 different sides of each marked cherry. The univariate and multivariate repeated measures ANOVA was used for the analysis of two sets of data.

Evaluating precision and repeatability of hand calipers

2016 ◽  
Vol 38 (2) ◽  
pp. 162-182 ◽  
Author(s):  
Steven G H Dorland
Keyword(s):  
Individual Variation ◽  
Coefficient Of Variation ◽  
Repeated Measures ◽  
Statistical Difference ◽  
Thought Processes ◽  
Variation Analysis ◽  
Repeated Measures Anova ◽  
Observer Error ◽  
Micro Scale ◽  
Effective Metric

Often, statistical evaluations of metric data are overlooked in ceramic studies. This paper evaluates degrees of precision and repeatability through the application of a coefficient of variation analysis and a repeated measures ANOVA. First, the author assessed the use of calipers for measuring metric data that pertains to decorative elements. Second, the author assessed the degree of statistical difference between measurements taken and measurements that have been rounded, a technique used to account for intra-observer error. The results demonstrate that the precision and repeatability of calipers is suitable for effectively measuring metric data values, and the precision of non-rounded values does not differ greatly from rounded values. The author argues that calipers are an effective metric measuring aid that further contribute to studies of personal actions and thought processes of potters. As a result, archaeological focus can integrate a micro-scale understanding of potting communities to consider finding individual variation and the learning landscapes of inexperienced potters.

scholarly journals Loading Range for the Development of Peak Power in the Close-Grip Bench Press versus the Traditional Bench Press

Sports ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 97 ◽  
Author(s):  
Robert Lockie ◽  
Samuel Callaghan ◽  
Ashley Orjalo ◽  
Matthew Moreno
Keyword(s):  
Peak Power ◽  
Bench Press ◽  
Relative Strength ◽  
Repetition Maximum ◽  
Factorial Anova ◽  
Significant Relationships ◽  
Power Load ◽  
Power Loading ◽  
Partial Correlations ◽  
Load Peak

The close-grip bench press (CGBP) is a variation of the traditional bench press (TBP) that uses a narrower grip (~95% biacromial distance) and has application for athletes performing explosive arm actions where the hands are positioned close to the torso. Limited research has investigated CGBP peak power. Twenty-six strength-trained individuals completed a one-repetition maximum TBP and CGBP. During two other sessions, subjects completed two repetitions as explosively as possible with loads from 20% to 90% for each exercise, with peak power measured by a linear position transducer. A factorial ANOVA calculated between- and within-exercise differences in peak power. Partial correlations controlling for sex determined relationships between absolute and relative strength and peak power load. Peak power for the TBP occurred at 50% 1RM, and 30% 1RM for the CGBP. There were no significant (p = 0.680) differences between peak power at each load when comparing the TBP and CGBP. For the within-exercise analysis, there were generally no significant differences in TBP and CGBP peak power for the 20–50% 1RM loads. There were no significant relationships between strength and peak power load (p = 0.100–0.587). A peak power loading range of 20–50% 1RM for the TBP and CGBP is suggested for strength-trained individuals.

Effect of Exercise Intensity on Active and Passive Glucose Absorption

2006 ◽  
Vol 16 (5) ◽  
pp. 485-493 ◽  
Author(s):  
James A. Lang ◽  
Carl V. Gisolfi ◽  
G. Patrick Lambert
Keyword(s):  
Urinary Excretion ◽  
Intestinal Absorption ◽  
Exercise Intensity ◽  
Repeated Measures ◽  
Glucose Absorption ◽  
The Other ◽  
Repeated Measures Anova ◽  
Intestinal Glucose Absorption ◽  
Trained Runners

The purpose of this study was to determine the effects of exercise intensity on active and passive intestinal glucose absorption. Eight trained runners (age = 23 ± 2 y; VO2max = 62.1 ± 5.8 mL · kg−1 · min−1) performed a 1 h resting experiment and three 1 h treadmill experiments at 30, 50, or 70% VO2max in a thermoneutral environment. Immediately prior to each experiment, euhydrated subjects ingested a solution containing two non-metabolizable glucose analogs, 3-O-methyl-D-glucose (3MG; actively absorbed; 5 g) and D-xylose (passively absorbed; 5 g). During the following 5 h, all urine was collected and the amount of 3MG and D-xylose in the urine was determined. Using repeated measures ANOVA, a significant (P < 0.05) reduction in urinary excretion of each carbohydrate was observed at 70% VO2max compared to the other intensities suggesting that both active and passive intestinal absorption of glucose may be reduced during prolonged running at this intensity.

13 EFFECT OF 6 TIMES REUSING OF CONTROLLED INTERNAL DRUG RELEASE (CIDR) FOR SHORT TERM (6 DAYS) ON PROGESTERONE LEVEL AND REPRODUCTIVE PERFORMANCE OF AWASSI EWES

2016 ◽  
Vol 28 (2) ◽  
pp. 136 ◽  
Author(s):  
A. Swelum ◽  
A. Mouamen ◽  
A. Alowaimer
Keyword(s):  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Repeated Measures ◽  
The Other ◽  
Serum Concentrations ◽  
Short Term ◽  
Chi Square ◽  
Withdrawal Time ◽  
Repeated Measures Anova ◽  
Significant Difference

This study was carried out using 120 multiparous Awassi ewes during breeding season to compare the effect of 6 times reusing of CIDR short term (6 days) on hormonal and reproductive performance. Ewes were equally and randomly allotted into 6 consecutive oestrus synchronization treatments. For group CIDR6×1, the ewes (n = 20) received new CIDR for 6 days with 300 IU of eCG at withdrawal time. For the other 5 groups, the same protocol was used, differing only by the use of the same CIDR for a second time in CIDR6×2, for a third time in CIDR6×3, for a fourth time in CIDR6×4, for a fifth time in CIDR6×5, and for a sixth time in CIDR6×6. Oestrus was detected using a vasectomized ram starting 12 h after progestagen withdrawal and repeated every 12 h up to 84 h. Blood samples were collected at withdrawal time (Day 6). Progesterone serum concentrations were measured using commercial ELISA kits and micro-titrimetric plates. Timed insemination was performed 48 h after CIDR withdrawal. Pregnancy and number of fetuses were diagnosed by ultrasonography at Day 23 after insemination and confirmed at Day 35 and 60. Comparisons among groups was evaluated using chi-square (χ2) test in all parameters except hormones levels, which was analysed by repeated-measures ANOVA, using SAS (SAS Institute Inc., Cary, NC, USA, 2000). The results revealed that there is no significant difference between the percentages of ewes detected in heat in groups CIDR6×1, CIDR6×2, and CIDR6×3 (55, 70, and 55%, respectively). While, the percentages of ewes detected in heat in group CIDR6×2 was significantly (P ≤ 0.05) higher than in groups CIDR6×4, CIDR6×5, and CIDR6×6 (35, 35, 31.58%, respectively). On the other hand, pregnancy rate was significantly (P ≤ 0.05) higher in CIDR6×2 (65%; 13/20) than CIDR6×3, CIDR6×4, CIDR6×5, and CIDR6×6 (30, 30, 30, and 15.79, respectively). No significant difference was detected in pregnancy rate between CIDR6×1 and CIDR6×2. No significant differences were detected in progesterone between CIDR6×1 and CIDR6×2, CIDR6×3, CIDR6×4, CIDR6×5, and CIDR6×6 (1.73, 1.67, 1.87, 1.57, 1.60, and 1.36 ng mL–1, respectively). These results indicated that reusing of CIDR devices for short term are efficient in synchronizing oestrus in ewes.

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.

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