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Barıs Seven, Gamze Cobanoglu, Deran Oskay and Nevin Atalay-Guzel

changeable velocities and can be used for measurement of agonist–antagonist strength. 8 In literature, there are some studies that have used isokinetic dynamometers for wrist strength measurement. 9 – 11 However, the number of the studies regarding test–retest reliability of isokinetic dynamometer is

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Alexander H.K. Montoye, Scott A. Conger, Joe R. Mitrzyk, Colby Beach, Alecia K. Fox and Jeremy A. Steeves

recommended for widespread RT tracking, reliability and validity of the Wristband2 must be evaluated. This study’s primary purpose was to evaluate the test-retest and inter-monitor reliability of the Atlas Wristband2. Methods Participants A total of 62 participants aged 18–52 years took part in this study

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Antonio Dello Iacono, Stephanie Valentin, Mark Sanderson and Israel Halperin

a strain gauge. This test does not depend on a force plate, can be easily administered without a complex setup, and assesses the horizontal forces component. Our aims were to examine the test–retest reliability of the IHPT PF outputs across 2 days and establish criterion validity by comparing the

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Manuel Trinidad-Fernández, Manuel González-Sánchez and Antonio I. Cuesta-Vargas

data over repeated measures between scapula positions using this new method in humans. Methods Study Design A cross-sectional study with a repeated-measures descriptive test–retest design was employed for the evaluation of this new tracking method. Participants Young adults (18–30 y old), who were

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Brendan T. O’Keeffe, Alan E. Donnelly and Ciaran MacDonncha

analyzed on the log-transformed scale ( 7 ). The test–retest reliability of measures taken on both groups was explored using relative and absolute indices, and the results were then compared. Paired samples t tests (Wilcoxon signed-rank tests for nonparametric data) were used to determine systematic bias

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Gemma N. Parry, Lee C. Herrington and Ian G. Horsley

research analyzing upper-limb power production via a plyometric push-up, with only a few studies investigating force plate–derived kinetic data to assess upper-limb power output. 5 – 7 There is evidence of moderate to high reliability with strong test–retest correlations (intraclass correlation

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Byron L. Zamboanga, Nathan T. Kearns, Janine V. Olthuis, Heidemarie Blumenthal and Renee M. Cloutier

key properties, such as test-retest reliability, have yet to be addressed. A preliminary test of the prospective stability of the recently established 7-factors/motives was thus the first aim of the current study. Elevated alcohol consumption is prevalent during emerging adulthood ( Andrews & Westling

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Ann Forsyth, J. Michael Oakes and Kathryn H. Schmitz

Background:

The Twin Cities Walking Study measured the associations of built environment versus socioeconomic and psychosocial variables with total physical activity and walking for 716 adults.

Methods:

This article reports on the test–retest reliability of the survey portion of the study. To test the reliability of the study measures, 158 respondents completed measures twice within 1 to 4 weeks. Agreement between participants’ responses was measured using Pearson r and Spearman rho, and kappa statistics.

Results:

Demographic questions are highly reliable (R > .8). Questions about environmental and social features are typically less reliable (rho range = 0.42– 0.91). Reliability of the International Physical Activity Questionnaire (last 7 days version) was low (rho = 0.15 for total activity).

Conclusions:

Much of the survey has acceptable-to-good reliability. The low test–retest reliability points to potential limitations of using a single administration of the IPAQ to characterize habitual physical activity. Implications for sound inference are accordingly complicated.

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Stephanie K. Gaskell, Rhiannon M.J. Snipe and Ricardo J.S. Costa

, nude body mass = 71.6 ± 10.0 kg, 15.4 ± 6.2% body fat mass, and V ˙ O 2 max  = 56.5 ± 7.9 ml·kg −1 ·min −1 ) volunteered to participate in this test–retest methodological study. All participants provided written informed consent. Each exercise protocol received approval from the local ethics committee

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Jonathan Sinclair, Jack Hebron and Paul J. Taylor

The principal source of measurement error in three-dimensional analyses is the definition of the joint center about which segmental rotations occur. The hip joint has received considerable attention in three-dimensional modeling analyses yet the reliability of the different techniques for the definition of the knee joint center has yet to be established. This study investigated the reliability of five different knee joint center estimation techniques: femoral epicondyle, femoral condyle, tibial ridge, plugin-gait, and functional. Twelve male participants walked at 1.25 m·s−1 and three-dimensional kinetics/kinematics of the knee and ankle were collected. The knee joint center was defined twice using each technique (test-and-retest) and the joint kinetic/kinematic data were applied to both. Wilcoxon rank tests and intraclass correlation coefficients (ICCs) were used to compare test and retest angular parameters and kinematic waveforms. The results show significant differences in coronal and transverse planes angulation using the tibial ridge, plug-in-gait, and functional methods. The strongest test-retest ICCs were observed for the femoral epicondyle and femoral condyle configurations. The findings from the current investigation advocate that the femoral epicondyle and femoral condyle techniques for the estimation of the knee joint center are currently the most reliable techniques.