scholarly journals Reliabilita testování maximální volní kontrakce horních a dolních končetin a trupu na izometrickém dynamometru

2011 ◽  
Vol 5 (1) ◽  
pp. 49-56
Author(s):  
Barbora Strejcová ◽  
Jiří Baláš ◽  
Ladislav Čaba ◽  
Miroslav Kadlec ◽  
Vladimír Sűss
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Knee Flexion ◽  
Intraclass Correlation ◽  
Rest Period ◽  
Elbow Flexion ◽  
Isometric Strength ◽  
Lower Body ◽  
Strength Measurement ◽  
Flexion And Extension

The aim of this study was to assess the reliability of isometric strength measurement in flexion and extension in the chosen joints of upper and lower body extremities using the dynamometer Vishay Tedea-Huntleigh Model 1042. The measurements were undertaken in two days with the rest period of forty-eight hours between sessions. Twenty sport students took part in the study (6 females, 25 ± 2,3 years; 14 males, 24,4 ± 2,7 years). We used the intraclass correlation coefficient (ICC) model (3,k) and Pearson´s r to assess the reliability. ICC of elbow flexion and extension was 0,92–0,96 (r =0,62–0,93), knee flexion and extension 0,91–0,95 (r = 0,87–0,92), trunk abduction and flexion were 0,85 and 0,75.

scholarly journals Validação e reprodutibilidade de plataforma de salto com laser para altura do salto em voleibolistas

Conexões ◽  
2008 ◽  
Vol 6 ◽  
pp. 111-121
Author(s):  
Leonardo dos Santos Oliveira ◽  
Solon José Gonçalves de Sousa ◽  
Richard Valadares Silva ◽  
Pedro Ianaí Pordeus Uchoa ◽  
Péricles Paes Barreto Correia ◽  
...  
Keyword(s):  
Key Words ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Vertical Jump ◽  
Intraclass Correlation ◽  
Rest Period ◽  
Variation Coefficient ◽  
Validation Process ◽  
Volleyball Players

A proposta deste estudo é analisar a validade e a reprodutibilidade de uma plataforma de salto com laser para medir a altura do salto em voleibolistas. A amostra foi formada por 18 praticantes de voleibol da cidade de Campina Grande/PB. Os indivíduos realizaram uma seqüência de 5 bloqueios com 15 segundos de intervalo na zona de salto ao centro da rede. Utilizou-se médias e coeficiente de variação, medida Alpha de Cronbach, correlação de Pearson e coeficiente de correlação intraclasse (CCI) para repetibilidade e reprodutibilidade. Todas as correlações encontradas foram acima de 0,60 e os CCI de 0,90, indicando que o processo de validação é pertinente. Neste estudo a proposta de validação é aceitável e satisfatória com base e de conformidade com os índices da literatura. Palavras-Chave: Testes; Voleibol; Medidas e avaliação; Salto vertical. VALIDAÇÃO E REPRODUTIBILIDADE DE PLATAFORMA DE SALTO COM LASER PARA ALTURA DO SALTO EM VOLEIBOLISTAS Leonardo dos Santos Oliveira Solon José Gonçalves de Sousa Richard Valadares Silva Pedro Ianaí Pordeus Uchôa Péricles Paes Barreto Correia Idico Luiz Pellegrinotti Gilmário Ricarte Batista Abstract The purpose of this study is to analyze the validity and reproducibility of a jump platform with laser to measure the height of the jump in volleyball players. The sample was formed by 18 apprentices of volleyball of Campina Grande/PB. The individuals accomplished a sequence of 5 blocks with 15 seconds of rest period in the jump zone to the center of the net. Used averages and variation coefficient, measured Alpha of Cronbach, Pearson's Product Momentand, Intraclass correlation coefficient (ICC) for repeatibility and reproducibility. All the found correlations were above 0,60 and ICC 0,90, indicating that the validation process is pertinent. In this study the validation purpose is acceptable and satisfactory with base and of conformity with the indexes of the literature. Key-Words: Tests; Volleyball; Measurement and assessment; Vertical jump.

Variability and Impact of Self-Selected Interset Rest Periods During Experienced Strength Training

2019 ◽  
Vol 126 (3) ◽  
pp. 546-558
Author(s):  
P. Ibbott ◽  
N. Ball ◽  
M. Welvaert ◽  
K. G. Thompson
Keyword(s):  
Strength Training ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Power Output ◽  
Intraclass Correlation ◽  
Rest Period ◽  
Subjective Ratings ◽  
Rest Periods ◽  
Significant Difference ◽  
Rest Time

We investigated the variability of strength trained athletes' self-selected rest periods between sets of heavy squat training. Sixteen strength-trained male athletes (Mage = 23, SD = 3 years) completed two squat training sessions 48 hours apart. Each training session consisted of five sets of 5RM squats, interspersed with self-selected interset rest periods. A Gymaware linear optical encoder collected kinetic data for each squat and temporal data for each interset rest period. The participants' subjective ratings of the experience were taken before (Readiness to Lift [RTL]) and after (Rating of Perceived Effort [RPE]) each set. Mean total rest time and mean power output differed significantly between sessions. For both sessions, interset rest period increased, and power output decreased between Sets 3, 4, and 5 (95% CI range [−101, −17]) compared with Set 1. In both sessions, RPE increased significantly in Set 3 compared with Set 1 (95% CI range = [0.68, 2.19]), while RTL decreased significantly from Set 3 (95% CI range [−2.99, −0.58]) compared to Set 1. Interset rest period and power output demonstrated fair reliability between sessions (mean intraclass correlation coefficient = 0.55), while RPE and RTL demonstrated good and excellent reliability, respectively (mean intraclass correlation coefficient = 0.63 and 0.80). In conclusion, highly trained strength athletes demonstrated a significant difference in their between session power output and total rest time when using self-selected interset rest periods, despite stability in their subjective ratings of fatigue and effort. Interset rest periods can be self-selected reliably to complete strength training in heavy squat protocol; however, power output may decline during the set.

The Effect of the Duration of Intertrial Rest Periods on Isometric Grip Strength Performance in Young Adults

1989 ◽  
Vol 9 (6) ◽  
pp. 362-378 ◽  
Author(s):  
Patricia B. Trossman ◽  
Ping-Wu Li
Keyword(s):  
Young Adults ◽  
Grip Strength ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Rest Period ◽  
Power Grip ◽  
Male And Female ◽  
Strength Performance ◽  
Rest Periods

This study examined the effect of the duration of intertrial rest periods on isometric grip strength scores in successive trials with the use of the power grip attachment of the Baltimore Therapeutic Equipment work simulator. Male and female subjects, 19 to 41 years of age, were randomly assigned to one of three groups, categorized by 15-, 30-, or 60-sec rest periods between five consecutive isometric grip tests. No significant differences were found between the groups in the pattern of decline in torque across trials. However, the group with the longest intertrial rest period had a significantly smaller percentage of decline in torque from the first to the last trial and the highest intraclass correlation coefficient between the five trials for both hands. In addition, the same group of subjects demonstrated significantly smaller differences in torque from the first to the second pretrial, which had a 2-min rest period, than from the first to the second experimental trial, which had shorter intertrial rest periods of 15, 30, or 60 sec.

scholarly journals Biomechanical Measurement of Rabbit Cornea by a Modified Scheimpflug Device

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Bo Zhang ◽  
Jianjun Gu ◽  
Xiaoxiao Zhang ◽  
Bin Yang ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Anterior Segment ◽  
Intraobserver Reliability ◽  
Rabbit Cornea ◽  
Deformation Response ◽  
Biomechanical Measurements ◽  
Biomechanical Measurement

Purpose. To explore the probability and variation in biomechanical measurements of rabbit cornea by a modified Scheimpflug device.Methods. A modified Scheimpflug device was developed by imaging anterior segment of the model imitating the intact eye at various posterior pressures. The eight isolated rabbit corneas were mounted on the Barron artificial chamber and images of the anterior segment were taken at posterior pressures of 15, 30, 45, 60, and 75 mmHg by the device. The repeatability and reliability of the parameters including CCT, ACD, ACV, and CV were evaluated at each posterior pressure. All the variations of the parameters at the different posterior pressures were calculated.Results. All parameters showed good intraobserver reliability (Cronbach’s alpha; intraclass correlation coefficient,α, ICC > 0.96) and repeatability in the modified Scheimpflug device. With the increase of posterior pressures, the ratio of CCT decreased linearly and the bulk modulus gradually reduced to a platform. The increase of ACD was almost linear with the posterior pressures elevated.Conclusions. The modified Scheimpflug device was a valuable tool to investigate the biomechanics of the cornea. The posterior pressure 15–75 mmHg range produced small viscoelastic deformations and nearly linear pressure-deformation response in the rabbit cornea.

scholarly journals A preliminary study of intensivist-performed DVT ultrasound screening in trauma ICU patients (APSIT Study)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Lloyd Roberts ◽  
Tom Rozen ◽  
Deirdre Murphy ◽  
Adam Lawler ◽  
Mark Fitzgerald ◽  
...  
Keyword(s):  
Intensive Care ◽  
Deep Vein Thrombosis ◽  
High Risk ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Major Trauma ◽  
Intraclass Correlation ◽  
Trauma Patients ◽  
Vein Thrombosis ◽  
Deep Vein

Abstract Background Multiple screening Duplex ultrasound scans (DUS) are performed in trauma patients at high risk of deep vein thrombosis (DVT) in the intensive care unit (ICU). Intensive care physician performed compression ultrasound (IP-CUS) has shown promise as a diagnostic test for DVT in a non-trauma setting. Whether IP-CUS can be used as a screening test in trauma patients is unknown. Our study aimed to assess the agreement between IP-CUS and vascular sonographer performed DUS for proximal lower extremity deep vein thrombosis (PLEDVT) screening in high-risk trauma patients in ICU. Methods A prospective observational study was conducted at the ICU of Alfred Hospital, a major trauma center in Melbourne, Australia, between Feb and Nov 2015. All adult major trauma patients admitted with high risk for DVT were eligible for inclusion. IP-CUS was performed immediately before or after DUS for PLEDVT screening. The paired studies were repeated twice weekly until the DVT diagnosis, death or ICU discharge. Written informed consent from the patient, or person responsible, or procedural authorisation, was obtained. The individuals performing the scans were blinded to the others’ results. The agreement analysis was performed using Cohen’s Kappa statistics and intraclass correlation coefficient for repeated binary measurements. Results During the study period, 117 patients had 193 pairs of scans, and 45 (39%) patients had more than one pair of scans. The median age (IQR) was 47 (28–68) years with 77% males, mean (SD) injury severity score 27.5 (9.53), and a median (IQR) ICU length of stay 7 (3.2–11.6) days. There were 16 cases (13.6%) of PLEDVT with an incidence rate of 2.6 (1.6–4.2) cases per 100 patient-days in ICU. The overall agreement was 96.7% (95% CI 94.15–99.33). The Cohen’s Kappa between the IP-CUS and DUS was 0.77 (95% CI 0.59–0.95), and the intraclass correlation coefficient for repeated binary measures was 0.75 (95% CI 0.67–0.81). Conclusions There is a substantial agreement between IP-CUS and DUS for PLEDVT screening in trauma patients in ICU with high risk for DVT. Large multicentre studies are needed to confirm this finding.

Test-Retest-Reliability of Computer-Based Metamorphopsia Measurement in Macular Diseases

2020 ◽  
Author(s):  
Daniela Claessens ◽  
Alexander K. Schuster ◽  
Ronald V. Krüger ◽  
Marian Liegl ◽  
Laila Singh ◽  
...  
Keyword(s):  
Macular Edema ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Measuring Method ◽  
Repeated Measurements ◽  
Retest Reliability ◽  
Macular Diseases ◽  
Computer Based ◽  
Test Retest Reliability

AbstractIn this study, the test-retest-reliability as one aspect of reliability of metamorphopsia measurements using a computer-based measuring method was determined in patients with macular diseases. Metamorphopsia amplitude, position, and area were quantified using AMD – A Metamorphopsia Detector software (app4eyes GmbH & Co. KG, Germany) in patients with diabetic, myopic, or uveitic macular edema, intermediate or neovascular age-associated macular degeneration, epiretinal membrane, vitelliform maculopathy, Irvine-Gass syndrome, or macular edema due to venous retinal occlusion. The intraclass correlation coefficient (ICC) was calculated in order to determine the repeatability of two repeated measurements and was used as an indicator of the reliability of the measurements. In this study, metamorphopsia measurements were conducted on 36 eyes with macular diseases. Metamorphopsia measurements made using AMD – A Metamorphopsia Detector software were highly reliable and repeatable in patients with maculopathies. The intraclass correlation coefficient of all indices was excellent (0.95 – 0.97). For diseases of the vitreoretinal interface or macular diseases with intra- or subretinal edema, this metamorphopsia measurement represents a supplement for visual function testing in the clinic, as well as in clinical studies.

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